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.NET Forum / ASP.NET / Building Controls / August 2005explanation of when need to repopulate control
I have a quesiton: if i have a composite control and on its intial page loading, i fill my (sub control) drop down list's items collection from the database and return. When the user hits a button to cause postback, the control is going to get initialized, then does its items collection that i filled on the initial page request get repopulated from viewstate? And on top of that, if so, does the list item that person selected in the drop down list again set itself as the selected item in the list? OR do i have to re-load the items on every page request and then populate its value some other way??? thanks a bunch My control's sub control (dropdownlist) doesn't have its items collection re-populated from viewstate. I also have a textbox that doesn't have its value persisted either (Well sort of. In the load event, i access the textbox and its value is blank, but when the control comes back to the user, the value i entered in that textbox is there!!!???) sorry for the large amount of code, but here it goes, again. using System; using System.Collections.Specialized; using System.Web.UI; using System.Web.UI.WebControls; using System.Text; using Operations.Teams.Business; using Operations.Teams.Data; using Operations.Teams.Reporting; using Operations.Teams.Reporting.WebControls; namespace Operations.Teams.Web.ReportControls { /// <summary> /// Summary description for FiscalAgentHierarchy. /// </summary> public class FiscalAgentHierarchy : Control, IReportParameterControl, INamingContainer { public FiscalAgentHierarchy() { Parameters.Add(new Parameter("@SchoolYear")); Parameters.Add(new Parameter("@ReportingGroup")); Parameters.Add(new Parameter("@FiscalAgentID")); Parameters.Add(new Parameter("@FundingSourceID")); Parameters.Add(new Parameter("@ProviderID")); Parameters.Add(new Parameter("@SiteID")); Parameters.Add(new Parameter("@ClassID")); Parameters["@SchoolYear"].Value = 2006; } #region Events protected override void OnInit(EventArgs e) { EnsureChildControls(); if(this.fasFiscalAgent.SelectedFiscalAgentName != string.Empty) { if(!Page.IsPostBack) { LoadFundingSource(); LoadProviders(); } } base.OnInit (e); } protected override void OnLoad(EventArgs e) { // The controls should now be in the control tree and its client values should be in it??? base.OnLoad (e); } private void rysReportingYearSelector_ReportingYearChanged(object sender, EventArgs e) { this.SchoolYear = rysReportingYearSelector.SchoolYear; this.ReportingYearGroupID = rysReportingYearSelector.ReportYearGroupId; this.LoadFundingSource(); this.LoadProviders(); } private void fasFiscalAgent_FiscalAgentChanged(object sender, EventArgs e) { this.FiscalAgentID = fasFiscalAgent.SelectedFiscalAgentId; this.LoadFundingSource(); this.LoadProviders(); } private void ddlProviders_SelectedIndexChanged(object sender, EventArgs e) { if(ddlProviders.SelectedValue != string.Empty) this.ProviderID = Convert.ToInt32(ddlProviders.SelectedValue); LoadSites(); } private void ddlSites_SelectedIndexChanged(object sender, EventArgs e) { if(ddlSites.SelectedValue != string.Empty) this.SiteID = Convert.ToInt32(ddlSites.SelectedValue); LoadClasses(); } #endregion TextBox box = new TextBox(); protected override void CreateChildControls() { box.ID = "box"; if(!Page.IsPostBack) box.Text = "hello"; Controls.Add(box); rysReportingYearSelector = new ReportingYearReportSelector(); fasFiscalAgent = new FiscalAgentReportSelector(); this.ddlFundingSource = new DropDownList(); this.ddlProviders = new DropDownList(); this.ddlSites = new DropDownList(); this.ddlClasses = new DropDownList(); rysReportingYearSelector.ID = ReportingYearSelectorControlId; fasFiscalAgent.ID = FiscalAgentSelectorControlId; ddlFundingSource.ID = FundingSourceControlId; ddlProviders.ID = ProvidersControlId; ddlSites.ID = SitesControlId; ddlClasses.ID = ClassesControlId; // Assign these controls' Page property because when they try to access Page they get null reference - apparently they aren't in the control tree at that point rysReportingYearSelector.Page = this.Page; fasFiscalAgent.Page = this.Page; rysReportingYearSelector.ReportingYearChanged += new EventHandler(rysReportingYearSelector_ReportingYearChanged); // fasFiscalAgent.FiscalAgentChanged += new EventHandler(fasFiscalAgent_FiscalAgentChanged); ddlProviders.SelectedIndexChanged += new EventHandler(ddlProviders_SelectedIndexChanged); ddlSites.SelectedIndexChanged += new EventHandler(ddlSites_SelectedIndexChanged); fasFiscalAgent.IsSubmitOnChange = true; ddlProviders.AutoPostBack = true; ddlSites.AutoPostBack = true; this.SchoolYear = rysReportingYearSelector.SchoolYear; // check if can populate funding sources and providers (because fiscalAgent has been saved in session) // if(this.fasFiscalAgent.SelectedFiscalAgentName != string.Empty) // { // if(!Page.IsPostBack) // { // LoadFundingSource(); // LoadProviders(); // } // } // else // { // ddlFundingSource.Visible = false; // ddlProviders.Visible = false; // } // Initially set to false until their direct parent's selection has been made (all other controls will have data on page load) ddlSites.Visible = false; ddlClasses.Visible = false; // start containing table this.Controls.Add(WebHelper.MakeLiteral("<table cellpadding=0 cellspacing=0><tr><td>")); this.Controls.Add(WebHelper.MakeLiteral("<table><tr><td>")); this.Controls.Add(rysReportingYearSelector); this.Controls.Add(WebHelper.MakeLiteral("</td></tr></table>")); this.Controls.Add(WebHelper.MakeLiteral("</td></tr><tr><td>")); this.Controls.Add(WebHelper.MakeLiteral("<table><tr><td>")); this.Controls.Add(fasFiscalAgent); this.Controls.Add(WebHelper.MakeLiteral("</td></tr></table>")); this.Controls.Add(WebHelper.MakeLiteral("</td></tr><tr><td>")); this.Controls.Add(WebHelper.MakeLiteral("<table><tr><td>Funding Source</td><td>")); this.Controls.Add(ddlFundingSource); this.Controls.Add(WebHelper.MakeLiteral("</td></tr></table>")); this.Controls.Add(WebHelper.MakeLiteral("</td></tr><tr><td>")); this.Controls.Add(WebHelper.MakeLiteral("<table><tr><td>Providers</td><td>") ); this.Controls.Add(ddlProviders); this.Controls.Add(WebHelper.MakeLiteral("</td></tr></table>")); this.Controls.Add(WebHelper.MakeLiteral("</td></tr><tr><td>")); this.Controls.Add(WebHelper.MakeLiteral("<table><tr><td>Sites</td><td>")); this.Controls.Add(ddlSites); this.Controls.Add(WebHelper.MakeLiteral("</td></tr></table>")); this.Controls.Add(WebHelper.MakeLiteral("</td></tr><tr><td>")); this.Controls.Add(WebHelper.MakeLiteral("<table><tr><td>Classes</td><td>")); this.Controls.Add(ddlClasses); this.Controls.Add(WebHelper.MakeLiteral("</td></tr></table>")); // end containing table this.Controls.Add(WebHelper.MakeLiteral("</td></tr></table>")); } private void LoadFundingSource() { int fiscalAgentId = this.fasFiscalAgent.SelectedFiscalAgentId; if(fiscalAgentId != int.MinValue) { this.ddlFundingSource.Visible = true; this.ddlFundingSource.DataSource = FiscalAgentFunding.Find(fiscalAgentId); this.ddlFundingSource.DataTextField = "ShortDescription"; this.ddlFundingSource.DataValueField = "CodeId"; this.ddlFundingSource.DataBind(); if(this.ddlFundingSource.Items.Count > 1) this.ddlFundingSource.Items.Insert(0, new ListItem(string.Empty, string.Empty)); } else { this.ddlFundingSource.Visible = false; } } private void LoadProviders() { ddlProviders.Items.Add(new ListItem("test","2")); ddlProviders.Items.Add(new ListItem("22","3")); ddlProviders.SelectedIndex = 0; int fiscalAgentId = fasFiscalAgent.SelectedFiscalAgentId; if(fiscalAgentId != int.MinValue) { ddlProviders.Visible = true; // are these dates correct??????????????????????????? ddlProviders.DataSource = FiscalAgentProvider.Find(fiscalAgentId, rysReportingYearSelector.ReportingYearStartDate, rysReportingYearSelector.ReportingYearEndDate); ddlProviders.DataTextField = "ProviderName"; ddlProviders.DataValueField = "ProviderId"; ddlProviders.DataBind(); ddlProviders.Items.Insert(0, new ListItem(string.Empty, string.Empty)); } else { this.ddlProviders.Items.Clear(); this.ddlProviders.Visible = false; } LoadSites(); } private void LoadSites() { if(ddlProviders.SelectedValue != string.Empty) { // Load the Site search parameters. SiteFindArgs siteFindArgs=new SiteFindArgs(); siteFindArgs.FiscalAgentId=Convert.ToInt32(fasFiscalAgent.SelectedFiscalAgen tId); ddlSites.Visible = true; ddlSites.DataSource = Business.Site.Find(siteFindArgs); ddlSites.DataTextField = "Name"; ddlSites.DataValueField = "SiteId"; ddlSites.DataBind(); ddlSites.Items.Insert(0, new ListItem(string.Empty, string.Empty)); } else { ddlSites.Items.Clear(); ddlSites.Visible = false; } LoadClasses(); } private void LoadClasses() { if(ddlSites.SelectedValue != string.Empty) { OperationsClassFindArgs OperationsClassFindArgs = new OperationsClassFindArgs(); OperationsClassFindArgs.FiscalAgentId = Convert.ToInt32(fasFiscalAgent.SelectedFiscalAgentId); OperationsClassFindArgs.ReportingYearStartDate = rysReportingYearSelector.ReportingYearStartDate; OperationsClassFindArgs.ReportingYearEndDate = rysReportingYearSelector.ReportingYearEndDate; OperationsClassFindArgs.ProviderName = ddlProviders.SelectedValue; OperationsClassFindArgs.SiteName = ddlSites.SelectedValue; ddlClasses.Visible = true; ddlClasses.DataSource = OperationsClass.Find(OperationsClassFindArgs); ddlClasses.DataTextField = "Name"; ddlClasses.DataValueField = "ClassId"; ddlClasses.DataBind(); ddlClasses.Items.Insert(0, new ListItem(string.Empty, string.Empty)); } else { ddlClasses.Items.Clear(); ddlClasses.Visible = false; } } #region Public Properties #region IReportParameterControl Members public object ParameterValue { get{ return null; } set{ /*do nothing */ } } public ParameterCollection Parameters { get{ return parameters; } set{ parameters = value;} } #endregion public int SchoolYear { get{ return (int) ViewState["SchoolYear"]; } set{ ViewState["SchoolYear"] = value; } } public int ReportingYearGroupID { get{ return (int) ViewState["ReportingYearGroupID"]; } set{ ViewState["ReportingYearGroupID"] = value; } } public int FiscalAgentID { get{ return (int) ViewState["FiscalAgentID"]; } set{ ViewState["FiscalAgentID"] = value; } } public int FundingSourceID { get{ return (int) ViewState["FundingSourceID"]; } set{ ViewState["FundingSourceID"] = value; } } public int ProviderID { get{ return (int) ViewState["ProviderID"]; } set{ ViewState["ProviderID"] = value; } } public int SiteID { get{ return (int) ViewState["SiteID"]; } set{ ViewState["SiteID"] = value; } } #endregion #region Private Member Variables private ReportingYearReportSelector rysReportingYearSelector; private FiscalAgentReportSelector fasFiscalAgent; private DropDownList ddlFundingSource; private DropDownList ddlProviders; private DropDownList ddlSites; private DropDownList ddlClasses; private ParameterCollection parameters = new ParameterCollection(); #endregion #region Private Constants private const string ReportingYearSelectorControlId = "rysReportingYearSelector"; private const string FiscalAgentSelectorControlId = "fasFiscalAgentSelector"; private const string FundingSourceControlId = "ddlFundingSource"; private const string FundingSourceLabelControlId = "lblFundingSource"; private const string ProvidersControlId = "ddlProviders"; private const string ProvidersLabelControlId = "lblProviders"; private const string SitesControlId = "ddlSites"; private const string SitesLabelControlId = "lblSites"; private const string ClassesControlId = "ddlClasses"; private const string ClassesLabelControlId = "lblClasses"; #endregion } } > I have a quesiton: > if i have a composite control and on its intial page loading, i fill my (sub [quoted text clipped - 9 lines] > > thanks a bunch sorry, heres the scenario i'm trying to accomplish: I have a composite control that contains 4 drop down lists. When the page loads initially, i want the first drop down filled and the rest invisible. When you select an item in this ddl, it posts back to the server and based on its value, it populates its immediate child's drop down list. So now the top ddl has a value selected and the 2nd one just has its items populated. Then when the 2nd drop down list gets selected, it posts to the server and its value is used to populate(filter) the items for the 3rd drop down list...and so on for each drop down list. Please tell me what i need to do to handle post back data and maintain state from one postback to another while keeping the drop downlists filled and their values persisted. thank you again! > I have a quesiton: > if i have a composite control and on its intial page loading, i fill my (sub [quoted text clipped - 9 lines] > > thanks a bunch Hi TS, See you again :-), seems you're rushing in a asp.net project these days? For the question you mentioned in this post, here are some of my understanding and suggestions: 1. ASP.NET controls derived from Control will automatically maintain its ViewStates according to the asp.net web page's events sequence. So for composite control, those nested sub Controls' status (properties which be persistd in Viewsstate ) will be store and retrieve automatically. 2. However, there're some thing we need to care when building composite control: #remember to implement INamingContainer for controls which will have nested sub controls. Otherwise, even handler mapping, ViewState loading will occur unexpectedly. #Do remember to assign a explicit ID for each sub controls(same reason as #1). Also, please always try best to add subcontrols in the "CreateChildControls" method(just create control hierarchy) and put manipulating code in postback event or PreRender event. In addition, for your detaile scenario, I've just built a very simple demo control which have three dropdownlists and The "Top" one will display first(other twos invisible) and according to the top one's selection, the "Mid" dropdownlist will be pouplated and the same when the "mid"'s selection changed...... Here's the control's code for your reference: ========================= [DefaultProperty("Text"), ToolboxData("<{0}:MultiListControl runat=server></{0}:MultiListControl>")] public class MultiListControl : System.Web.UI.WebControls.WebControl, INamingContainer { private string text; private DropDownList lstTop; private DropDownList lstMid; private DropDownList lstBot; protected bool MidVisible { get{ if(ViewState["MID_VISIBLE"] == null) { return false; } return (bool)ViewState["MID_VISIBLE"]; } set{ TrackViewState(); ViewState["MID_VISIBLE"] = value; } } protected bool BotVisible { get { if(ViewState["BOT_VISIBLE"] == null) { return false; } return (bool)ViewState["BOT_VISIBLE"]; } set { TrackViewState(); ViewState["BOT_VISIBLE"] = value; } } [Bindable(true), Category("Appearance"), DefaultValue("")] public string Text { get { return text; } set { text = value; } } protected override void CreateChildControls() { Controls.Clear(); Controls.Add( new LiteralControl( @" <table width='100%'> <tr><td> ")); lstTop = new DropDownList(); lstTop.ID = "lstTop"; lstTop.Items.Add("----------"); lstTop.Items.Add("Top_Item_1"); lstTop.Items.Add("Top_Item_2"); lstTop.Items.Add("Top_Item_3"); lstTop.Items.Add("Top_Item_4"); Controls.Add(lstTop); Controls.Add( new LiteralControl( @"<br/>" )); lstMid = new DropDownList(); lstMid.ID = "lstMid"; Controls.Add(lstMid); Controls.Add( new LiteralControl( @"<br/>" )); lstBot = new DropDownList(); lstBot.ID = "lstBot"; Controls.Add(lstBot); Controls.Add( new LiteralControl( @" </td></tr> </table> " )); lstTop.SelectedIndexChanged +=new EventHandler(lst_SelectedIndexChanged); lstMid.SelectedIndexChanged +=new EventHandler(lst_SelectedIndexChanged); lstBot.SelectedIndexChanged +=new EventHandler(lst_SelectedIndexChanged); lstTop.AutoPostBack = lstMid.AutoPostBack = lstBot.AutoPostBack = true; } protected override void OnPreRender(EventArgs e) { base.OnPreRender (e); lstMid.Visible = MidVisible; lstBot.Visible = BotVisible; } private void lst_SelectedIndexChanged(object sender, System.EventArgs e) { DropDownList lst = sender as DropDownList; switch(lst.ID) { case "lstTop": if(lst.SelectedIndex != 0) { lstMid.DataSource = GetSubItems(lst.SelectedValue); lstMid.DataTextField = "Text"; lstMid.DataValueField= "Value"; lstMid.DataBind(); MidVisible = true; } else { MidVisible = BotVisible = false; } break; case "lstMid": lstBot.DataSource = GetSubItems(lst.SelectedValue); lstBot.DataTextField = "Text"; lstBot.DataValueField= "Value"; lstBot.DataBind(); MidVisible = BotVisible = true; break; case "lstBot": break; } Page.Response.Write("<br>" + lst.ID + "_selectedindexchanged!" + lst.EnableViewState); } #region --Helper functions--- public ListItemCollection GetSubItems(string parent) { ListItemCollection items = new ListItemCollection(); int count = parent.Length; for(int i=0;i<count;++i) { items.Add(parent + "_Item_" + i); } return items; } #endregion } ======================== Hope helps. Thanks, Steven Cheng Microsoft Online Support  SignatureGet Secure! www.microsoft.com/security (This posting is provided "AS IS", with no warranties, and confers no rights.) -------------------- | From: "TS" <manofsteele1@nospam.nospam> | References: <uzUvXf6lFHA.1372@TK2MSFTNGP10.phx.gbl> [quoted text clipped - 7 lines] | Message-ID: <uRDywp7lFHA.3552@TK2MSFTNGP10.phx.gbl> | Newsgroups: microsoft.public.dotnet.framework.aspnet.webcontrols,microsoft.public.dotnet .framework.aspnet.buildingcontrols | NNTP-Posting-Host: 103nat100.tea.state.tx.us 198.214.103.100 | Path: TK2MSFTNGXA01.phx.gbl!TK2MSFTNGP08.phx.gbl!TK2MSFTNGP10.phx.gbl | Xref: TK2MSFTNGXA01.phx.gbl microsoft.public.dotnet.framework.aspnet.buildingcontrols:3979 microsoft.public.dotnet.framework.aspnet.webcontrols:10243 | X-Tomcat-NG: microsoft.public.dotnet.framework.aspnet.buildingcontrols | [quoted text clipped - 30 lines] | > | > thanks a bunch Thanks a bunch Steven I have gotten a lot of progress. I can always count on you. I now have a new problem. The composite controls in my composite control correctly fires their sub drop down lists which gets handled in my main composite control. Then I have 4 drop down lists in my composite control, and none of their selectedIndexChanged events fire. I'm pretty sure i have all my bases covered and don't know what the problem could be. Both sub composite controls use INamingContainter and set their control's Id property. Any other thoughts? thanks My latest code: using System; using System.Collections.Specialized; using System.Web.UI; using System.Web.UI.WebControls; using System.Text; using OperationsTeams.Business; using OperationsTeams.Data; using OperationsTeams.Reporting; using OperationsTeams.Reporting.WebControls; namespace OperationsTeams.Web.ReportControls { /// <summary> /// Summary description for FiscalAgentHierarchy. /// </summary> public class FiscalAgentHierarchy : WebControl, IReportParameterControl, INamingContainer { public FiscalAgentHierarchy() { Parameters.Add(new Parameter("@SchoolYear")); Parameters.Add(new Parameter("@ReportingGroup")); Parameters.Add(new Parameter("@FiscalAgentID")); Parameters.Add(new Parameter("@FundingSourceID")); Parameters.Add(new Parameter("@ProviderID")); Parameters.Add(new Parameter("@SiteID")); Parameters.Add(new Parameter("@ClassID")); Parameters["@SchoolYear"].Value = 2006; } #region Events protected override void OnPreRender(EventArgs e) { base.OnPreRender (e); // The controls now have the client values from the the last postback ddlFundingSource.Visible = FundingSourceVisible; ddlProviders.Visible = ProviderVisible; ddlSites.Visible = SiteVisible; ddlClasses.Visible = ClassVisible; } private void rysReportingYearSelector_ReportingYearChanged(object sender, EventArgs e) { this.LoadFundingSource(); this.LoadProviders(); } private void fasFiscalAgent_FiscalAgentChanged(object sender, EventArgs e) { this.LoadFundingSource(); this.LoadProviders(); } private void ddlFundingSource_SelectedIndexChanged(object sender, EventArgs e) { LoadSites(); } private void ddlProviders_SelectedIndexChanged(object sender, EventArgs e) { LoadSites(); } private void ddlSites_SelectedIndexChanged(object sender, EventArgs e) { LoadClasses(); } #endregion protected override void CreateChildControls() { rysReportingYearSelector = new ReportingYearReportSelector(); fasFiscalAgent = new FiscalAgentReportSelector(); this.ddlFundingSource = new DropDownList(); this.ddlProviders = new DropDownList(); this.ddlSites = new DropDownList(); this.ddlClasses = new DropDownList(); rysReportingYearSelector.ID = ReportingYearSelectorControlId; fasFiscalAgent.ID = FiscalAgentSelectorControlId; ddlFundingSource.ID = FundingSourceControlId; ddlProviders.ID = ProvidersControlId; ddlSites.ID = SitesControlId; ddlClasses.ID = ClassesControlId; // Assign these controls' Page property because when they try to access Page they get null reference - apparently they aren't in the control tree at that point rysReportingYearSelector.Page = this.Page; fasFiscalAgent.Page = this.Page; rysReportingYearSelector.ReportingYearChanged += new EventHandler(rysReportingYearSelector_ReportingYearChanged); fasFiscalAgent.FiscalAgentChanged += new EventHandler(fasFiscalAgent_FiscalAgentChanged); ddlProviders.SelectedIndexChanged += new EventHandler(ddlProviders_SelectedIndexChanged); ddlSites.SelectedIndexChanged += new EventHandler(ddlSites_SelectedIndexChanged); fasFiscalAgent.IsSubmitOnChange = true; ddlProviders.AutoPostBack = true; ddlSites.AutoPostBack = true; // start containing table this.Controls.Add(WebHelper.MakeLiteral("<table cellpadding=0 cellspacing=0><tr><td>")); this.Controls.Add(WebHelper.MakeLiteral("<table><tr><td>")); this.Controls.Add(rysReportingYearSelector); this.Controls.Add(WebHelper.MakeLiteral("</td></tr></table>")); this.Controls.Add(WebHelper.MakeLiteral("</td></tr><tr><td>")); this.Controls.Add(WebHelper.MakeLiteral("<table><tr><td>")); this.Controls.Add(fasFiscalAgent); this.Controls.Add(WebHelper.MakeLiteral("</td></tr></table>")); this.Controls.Add(WebHelper.MakeLiteral("</td></tr><tr><td>")); this.Controls.Add(WebHelper.MakeLiteral("<table><tr><td>Funding Source</td><td>")); this.Controls.Add(ddlFundingSource); this.Controls.Add(WebHelper.MakeLiteral("</td></tr></table>")); this.Controls.Add(WebHelper.MakeLiteral("</td></tr><tr><td>")); this.Controls.Add(WebHelper.MakeLiteral("<table><tr><td>Providers</td><td>") ); this.Controls.Add(ddlProviders); this.Controls.Add(WebHelper.MakeLiteral("</td></tr></table>")); this.Controls.Add(WebHelper.MakeLiteral("</td></tr><tr><td>")); this.Controls.Add(WebHelper.MakeLiteral("<table><tr><td>Sites</td><td>")); this.Controls.Add(ddlSites); this.Controls.Add(WebHelper.MakeLiteral("</td></tr></table>")); this.Controls.Add(WebHelper.MakeLiteral("</td></tr><tr><td>")); this.Controls.Add(WebHelper.MakeLiteral("<table><tr><td>Classes</td><td>")); this.Controls.Add(ddlClasses); this.Controls.Add(WebHelper.MakeLiteral("</td></tr></table>")); // end containing table this.Controls.Add(WebHelper.MakeLiteral("</td></tr></table>")); } private void LoadFundingSource() { int fiscalAgentId = this.fasFiscalAgent.SelectedFiscalAgentId; if(fiscalAgentId != int.MinValue) { FundingSourceVisible = true; this.ddlFundingSource.DataSource = FiscalAgentFunding.Find(fiscalAgentId); this.ddlFundingSource.DataTextField = "ShortDescription"; this.ddlFundingSource.DataValueField = "CodeId"; this.ddlFundingSource.DataBind(); if(this.ddlFundingSource.Items.Count > 1) this.ddlFundingSource.Items.Insert(0, new ListItem(string.Empty, string.Empty)); } else { FundingSourceVisible = false; } } private void LoadProviders() { int fiscalAgentId = fasFiscalAgent.SelectedFiscalAgentId; if(fiscalAgentId != int.MinValue) { ProviderVisible = true; // are these dates correct??????????????????????????? ddlProviders.DataSource = FiscalAgentProvider.Find(fiscalAgentId, rysReportingYearSelector.ReportingYearStartDate, rysReportingYearSelector.ReportingYearEndDate); //new DateTime(2005,7,1), new DateTime(2006,6,30)); ddlProviders.DataTextField = "ProviderName"; ddlProviders.DataValueField = "ProviderId"; ddlProviders.DataBind(); ddlProviders.Items.Insert(0, new ListItem(string.Empty, string.Empty)); } else { this.ddlProviders.Items.Clear(); ProviderVisible = false; } } private void LoadSites() { if(ddlProviders.SelectedValue != string.Empty) { // Load the Site search parameters. SiteFindArgs siteFindArgs=new SiteFindArgs(); siteFindArgs.FiscalAgentId=Convert.ToInt32(fasFiscalAgent.SelectedFiscalAgen tId); SiteVisible = true; ddlSites.DataSource = Business.Site.Find(siteFindArgs); ddlSites.DataTextField = "Name"; ddlSites.DataValueField = "SiteId"; ddlSites.DataBind(); ddlSites.Items.Insert(0, new ListItem(string.Empty, string.Empty)); } else { ddlSites.Items.Clear(); SiteVisible = false; } } private void LoadClasses() { if(ddlSites.SelectedValue != string.Empty) { AdultEdClassFindArgs adultEdClassFindArgs = new AdultEdClassFindArgs(); adultEdClassFindArgs.FiscalAgentId = Convert.ToInt32(fasFiscalAgent.SelectedFiscalAgentId); adultEdClassFindArgs.ReportingYearStartDate = rysReportingYearSelector.ReportingYearStartDate; adultEdClassFindArgs.ReportingYearEndDate = rysReportingYearSelector.ReportingYearEndDate; adultEdClassFindArgs.ProviderName = ddlProviders.SelectedValue; adultEdClassFindArgs.SiteName = ddlSites.SelectedValue; ClassVisible = true; ddlClasses.DataSource = AdultEdClass.Find(adultEdClassFindArgs); ddlClasses.DataTextField = "Name"; ddlClasses.DataValueField = "ClassId"; ddlClasses.DataBind(); ddlClasses.Items.Insert(0, new ListItem(string.Empty, string.Empty)); } else { ddlClasses.Items.Clear(); ClassVisible = false; } } #region Public Properties #region IReportParameterControl Members public object ParameterValue { get{ return null; } set{ /*do nothing */ } } public ParameterCollection Parameters { get{ return parameters; } set{ parameters = value;} } #endregion protected bool FundingSourceVisible { get { if(ViewState["FundingSourceVisible"] == null) { return false; } return (bool)ViewState["FundingSourceVisible"]; } set { TrackViewState(); ViewState["FundingSourceVisible"] = value; } } protected bool ProviderVisible { get { if(ViewState["ProviderVisible"] == null) { return false; } return (bool)ViewState["ProviderVisible"]; } set { TrackViewState(); ViewState["ProviderVisible"] = value; } } protected bool SiteVisible { get { if(ViewState["SiteVisible"] == null) { return false; } return (bool)ViewState["SiteVisible"]; } set { TrackViewState(); ViewState["SiteVisible"] = value; } } protected bool ClassVisible { get { if(ViewState["ClassVisible"] == null) { return false; } return (bool)ViewState["ClassVisible"]; } set { TrackViewState(); ViewState["ClassVisible"] = value; } } #endregion #region Private Member Variables private ReportingYearReportSelector rysReportingYearSelector; private FiscalAgentReportSelector fasFiscalAgent; private DropDownList ddlFundingSource; private DropDownList ddlProviders; private DropDownList ddlSites; private DropDownList ddlClasses; private ParameterCollection parameters = new ParameterCollection(); #endregion #region Private Constants private const string ReportingYearSelectorControlId = "rysReportingYearSelector"; private const string FiscalAgentSelectorControlId = "fasFiscalAgentSelector"; private const string FundingSourceControlId = "ddlFundingSource"; private const string FundingSourceLabelControlId = "lblFundingSource"; private const string ProvidersControlId = "ddlProviders"; private const string ProvidersLabelControlId = "lblProviders"; private const string SitesControlId = "ddlSites"; private const string SitesLabelControlId = "lblSites"; private const string ClassesControlId = "ddlClasses"; private const string ClassesLabelControlId = "lblClasses"; #endregion } } > Hi TS, > [quoted text clipped - 239 lines] > | Message-ID: <uRDywp7lFHA.3552@TK2MSFTNGP10.phx.gbl> > | Newsgroups: microsoft.public.dotnet.framework.aspnet.webcontrols,microsoft.public.dotnet > framework.aspnet.buildingcontrols > | NNTP-Posting-Host: 103nat100.tea.state.tx.us 198.214.103.100 [quoted text clipped - 41 lines] > | > > | > thanks a bunch Another problem: while i'm waiting on your remark to my last post, i removed the sub composite controls from my composite control so that there is only drop down lists on it. During CreateChildcontrols, i load the main drop down using databind. When the page is sent to browser for the first time, i have my main drop down filled. I then select an item and its SelectedIndexChanged fires and populates the send drop down list. Then when i select an item from it, it posts back, and the event that gets called is the main(first) dropdown list's SelectedIndexChanged event, which then re-populates the second drop down list, then the control returns to the browser (The SelectedIndexChanged event never fired for the 2nd dropdown's changed event.??? thanks again using System; using System.Collections.Specialized; using System.Web.UI; using System.Web.UI.WebControls; using System.Text; using OperationsTeams.Business; using OperationsTeams.Data; using OperationsTeams.Reporting; using OperationsTeams.Reporting.WebControls; namespace OperationsTeams.Web.ReportControls { /// <summary> /// Summary description for FiscalAgentHierarchy. /// </summary> public class FiscalAgentHierarchy : WebControl, IReportParameterControl, INamingContainer { public FiscalAgentHierarchy() { Parameters.Add(new Parameter("@SchoolYear")); Parameters.Add(new Parameter("@ReportingGroup")); Parameters.Add(new Parameter("@FiscalAgentID")); Parameters.Add(new Parameter("@FundingSourceID")); Parameters.Add(new Parameter("@ProviderID")); Parameters.Add(new Parameter("@SiteID")); Parameters.Add(new Parameter("@ClassID")); Parameters["@SchoolYear"].Value = 2006; } #region Events protected override void OnLoad(EventArgs e) { base.OnLoad (e); // The last state of controls from viewstate is now loaded (Before the client data is processed) } protected override void OnPreRender(EventArgs e) { base.OnPreRender (e); // The controls now have the client values from the the last postback // ddlFundingSource.Visible = FundingSourceVisible; // ddlProviders.Visible = ProviderVisible; // ddlSites.Visible = SiteVisible; // ddlClasses.Visible = ClassVisible; // ddlSites.Items.Add(new ListItem("help","1")); // ddlSites.Items.Add(new ListItem("me","2")); // ddlSites.Visible = true; } private void rysReportingYearSelector_ReportingYearChanged(object sender, EventArgs e) { // this.LoadFundingSource(); // this.LoadProviders(); } private void fasFiscalAgent_FiscalAgentChanged(object sender, EventArgs e) { this.LoadFundingSource(); this.LoadProviders(); } private void ddlFundingSource_SelectedIndexChanged(object sender, EventArgs e) { LoadSites(); } private void ddlProviders_SelectedIndexChanged(object sender, EventArgs e) { LoadSites(); } private void ddlSites_SelectedIndexChanged(object sender, EventArgs e) { LoadClasses(); } #endregion protected override void CreateChildControls() { this.ddlFundingSource = new DropDownList(); this.ddlProviders = new DropDownList(); this.ddlSites = new DropDownList(); this.ddlClasses = new DropDownList(); ddlFundingSource.ID = FundingSourceControlId; ddlProviders.ID = ProvidersControlId; ddlSites.ID = SitesControlId; ddlClasses.ID = ClassesControlId; LoadProviders(); // start containing table this.Controls.Add(WebHelper.MakeLiteral("<table cellpadding=0 cellspacing=0><tr><td>")); this.Controls.Add(WebHelper.MakeLiteral("<table><tr><td>")); // this.Controls.Add(rysReportingYearSelector); this.Controls.Add(WebHelper.MakeLiteral("</td></tr></table>")); this.Controls.Add(WebHelper.MakeLiteral("</td></tr><tr><td>")); this.Controls.Add(WebHelper.MakeLiteral("<table><tr><td>")); // this.Controls.Add(fasFiscalAgent); this.Controls.Add(WebHelper.MakeLiteral("</td></tr></table>")); this.Controls.Add(WebHelper.MakeLiteral("</td></tr><tr><td>")); this.Controls.Add(WebHelper.MakeLiteral("<table><tr><td>Funding Source</td><td>")); this.Controls.Add(ddlFundingSource); this.Controls.Add(WebHelper.MakeLiteral("</td></tr></table>")); this.Controls.Add(WebHelper.MakeLiteral("</td></tr><tr><td>")); this.Controls.Add(WebHelper.MakeLiteral("<table><tr><td>Providers</td><td>") ); this.Controls.Add(ddlProviders); this.Controls.Add(WebHelper.MakeLiteral("</td></tr></table>")); this.Controls.Add(WebHelper.MakeLiteral("</td></tr><tr><td>")); this.Controls.Add(WebHelper.MakeLiteral("<table><tr><td>Sites</td><td>")); this.Controls.Add(ddlSites); this.Controls.Add(WebHelper.MakeLiteral("</td></tr></table>")); this.Controls.Add(WebHelper.MakeLiteral("</td></tr><tr><td>")); this.Controls.Add(WebHelper.MakeLiteral("<table><tr><td>Classes</td><td>")); this.Controls.Add(ddlClasses); this.Controls.Add(WebHelper.MakeLiteral("</td></tr></table>")); // end containing table this.Controls.Add(WebHelper.MakeLiteral("</td></tr></table>")); ddlFundingSource.SelectedIndexChanged += new EventHandler(ddlFundingSource_SelectedIndexChanged); ddlProviders.SelectedIndexChanged += new EventHandler(ddlProviders_SelectedIndexChanged); ddlSites.SelectedIndexChanged += new EventHandler(ddlSites_SelectedIndexChanged); ddlFundingSource.AutoPostBack = ddlProviders.AutoPostBack = ddlSites.AutoPostBack = true; } private void LoadFundingSource() { int fiscalAgentId = 1;//this.fasFiscalAgent.SelectedFiscalAgentId; if(fiscalAgentId != int.MinValue) { FundingSourceVisible = true; this.ddlFundingSource.DataSource = FiscalAgentFunding.Find(fiscalAgentId); this.ddlFundingSource.DataTextField = "ShortDescription"; this.ddlFundingSource.DataValueField = "CodeId"; this.ddlFundingSource.DataBind(); if(this.ddlFundingSource.Items.Count > 1) this.ddlFundingSource.Items.Insert(0, new ListItem(string.Empty, string.Empty)); } else { FundingSourceVisible = false; } } private void LoadProviders() { int fiscalAgentId = 1;//fasFiscalAgent.SelectedFiscalAgentId; if(fiscalAgentId != int.MinValue) { // ddlSites.Items.Add(new ListItem("help","1")); // ddlSites.Items.Add(new ListItem("me","2")); ProviderVisible = true; // are these dates correct??????????????????????????? ddlProviders.DataSource = FiscalAgentProvider.Find(fiscalAgentId, new DateTime(2005,7,1), new DateTime(2006,6,30));//rysReportingYearSelector.ReportingYearStartDate, rysReportingYearSelector.ReportingYearEndDate); // ddlProviders.DataTextField = "ProviderName"; ddlProviders.DataValueField = "ProviderId"; ddlProviders.DataBind(); ddlProviders.Items.Insert(0, new ListItem(string.Empty, string.Empty)); } else { this.ddlProviders.Items.Clear(); ProviderVisible = false; } // LoadSites(); } private void LoadSites() { if(ddlProviders.SelectedValue != string.Empty) { // Load the Site search parameters. SiteFindArgs siteFindArgs=new SiteFindArgs(); siteFindArgs.FiscalAgentId=1; //Convert.ToInt32(fasFiscalAgent.SelectedFiscalAgentId); SiteVisible = true; ddlSites.DataSource = Business.Site.Find(siteFindArgs); ddlSites.DataTextField = "Name"; ddlSites.DataValueField = "SiteId"; ddlSites.DataBind(); ddlSites.Items.Insert(0, new ListItem(string.Empty, string.Empty)); } else { ddlSites.Items.Clear(); SiteVisible = false; } // LoadClasses(); } private void LoadClasses() { if(ddlSites.SelectedValue != string.Empty) { AdultEdClassFindArgs adultEdClassFindArgs = new AdultEdClassFindArgs(); // adultEdClassFindArgs.FiscalAgentId = Convert.ToInt32(fasFiscalAgent.SelectedFiscalAgentId); // adultEdClassFindArgs.ReportingYearStartDate = rysReportingYearSelector.ReportingYearStartDate; // adultEdClassFindArgs.ReportingYearEndDate = rysReportingYearSelector.ReportingYearEndDate; // adultEdClassFindArgs.ProviderName = ddlProviders.SelectedValue; // adultEdClassFindArgs.SiteName = ddlSites.SelectedValue; ClassVisible = true; ddlClasses.DataSource = AdultEdClass.Find(adultEdClassFindArgs); ddlClasses.DataTextField = "Name"; ddlClasses.DataValueField = "ClassId"; ddlClasses.DataBind(); ddlClasses.Items.Insert(0, new ListItem(string.Empty, string.Empty)); } else { ddlClasses.Items.Clear(); ClassVisible = false; } } #region Public Properties #region IReportParameterControl Members public object ParameterValue { get{ return null; } set{ /*do nothing */ } } public ParameterCollection Parameters { get{ return parameters; } set{ parameters = value;} } #endregion protected bool FundingSourceVisible { get { if(ViewState["FundingSourceVisible"] == null) { return false; } return (bool)ViewState["FundingSourceVisible"]; } set { TrackViewState(); ViewState["FundingSourceVisible"] = value; } } protected bool ProviderVisible { get { if(ViewState["ProviderVisible"] == null) { return false; } return (bool)ViewState["ProviderVisible"]; } set { TrackViewState(); ViewState["ProviderVisible"] = value; } } protected bool SiteVisible { get { if(ViewState["SiteVisible"] == null) { return false; } return (bool)ViewState["SiteVisible"]; } set { TrackViewState(); ViewState["SiteVisible"] = value; } } protected bool ClassVisible { get { if(ViewState["ClassVisible"] == null) { return false; } return (bool)ViewState["ClassVisible"]; } set { TrackViewState(); ViewState["ClassVisible"] = value; } } #endregion #region Private Member Variables private DropDownList ddlFundingSource; private DropDownList ddlProviders; private DropDownList ddlSites; private DropDownList ddlClasses; private ParameterCollection parameters = new ParameterCollection(); #endregion #region Private Constants private const string ReportingYearSelectorControlId = "rysReportingYearSelector"; private const string FiscalAgentSelectorControlId = "fasFiscalAgentSelector"; private const string FundingSourceControlId = "ddlFundingSource"; private const string FundingSourceLabelControlId = "lblFundingSource"; private const string ProvidersControlId = "ddlProviders"; private const string ProvidersLabelControlId = "lblProviders"; private const string SitesControlId = "ddlSites"; private const string SitesLabelControlId = "lblSites"; private const string ClassesControlId = "ddlClasses"; private const string ClassesLabelControlId = "lblClasses"; #endregion } } > Hi TS, > [quoted text clipped - 239 lines] > | Message-ID: <uRDywp7lFHA.3552@TK2MSFTNGP10.phx.gbl> > | Newsgroups: microsoft.public.dotnet.framework.aspnet.webcontrols,microsoft.public.dotnet > framework.aspnet.buildingcontrols > | NNTP-Posting-Host: 103nat100.tea.state.tx.us 198.214.103.100 [quoted text clipped - 41 lines] > | > > | > thanks a bunch In testing, i removed the main parent dropdown and only left the 2 below it. this time, the same scenario happened...when the child dropdown list autopostsback, it's immediate parent's selectedindexchanged event fires! I'm starting to pull my hair out now...I"m stuck! please help superman > Another problem: > [quoted text clipped - 203 lines] > > this.Controls.Add(WebHelper.MakeLiteral("</td></tr><tr><td>")); this.Controls.Add(WebHelper.MakeLiteral("<table><tr><td>Providers</td><td>") > ); > [quoted text clipped - 11 lines] > > this.Controls.Add(WebHelper.MakeLiteral("</td></tr><tr><td>")); this.Controls.Add(WebHelper.MakeLiteral("<table><tr><td>Classes</td><td>")); > this.Controls.Add(ddlClasses); > [quoted text clipped - 639 lines] > > | Message-ID: <uRDywp7lFHA.3552@TK2MSFTNGP10.phx.gbl> > > | Newsgroups: microsoft.public.dotnet.framework.aspnet.webcontrols,microsoft.public.dotnet > > framework.aspnet.buildingcontrols > > | NNTP-Posting-Host: 103nat100.tea.state.tx.us 198.214.103.100 [quoted text clipped - 50 lines] > > | > > > | > thanks a bunch I have figured the cause of the problem, sort of. My main control was being loaded dynamically during a custom data list control's ItemDataBound event, and then added to the e.item.controls collection. Once I removed it from here, the correct event was called in my control. the problem is i need to keep it where it is because of the way the page works. I tried to add INamingContainer to the custom Datalist, but that didn't help. Any ideas what could make this happen? thanks so much, i know i'm being a pain, but i'm stuck! This is the custom DataLists' event: protected override void OnItemDataBound(DataListItemEventArgs e) { base.OnItemDataBound(e); Parameter parameter = (Parameter)e.Item.DataItem; try { Control control; if(parameter.Type == ParameterType.Control) control = this.Page.LoadControl(parameter.ControlPath); else { Assembly assembly = parameter.Assembly; if(assembly == null) { // The control didn't declare its own assembly, so use the report's ControlsAssembly assembly = this.ControlsAssembly; // Ther report's ControlsAssembly is null, so use current page's assembly if(assembly == null) assembly = this.Page.GetType().BaseType.Assembly; } control = (Control) assembly.CreateInstance(parameter.ControlTypeName); } control.ID = parameter.Name; // Set up all the properties of this control from the parameter.properties foreach(DictionaryEntry de in parameter.Properties) SetProperty(de.Key.ToString(), de.Value.ToString(), control); e.Item.Controls.Add(control); } catch (Exception ex) { throw new ApplicationException("Unable to render criteria. Reason: " + ex.Message, ex); } } > In testing, i removed the main parent dropdown and only left the 2 below it. > this time, the same scenario happened...when the child dropdown list [quoted text clipped - 213 lines] > > > > this.Controls.Add(WebHelper.MakeLiteral("</td></tr><tr><td>")); this.Controls.Add(WebHelper.MakeLiteral("<table><tr><td>Providers</td><td>") > > ); > > [quoted text clipped - 3 lines] > > > > this.Controls.Add(WebHelper.MakeLiteral("</td></tr><tr><td>")); this.Controls.Add(WebHelper.MakeLiteral("<table><tr><td>Sites</td><td>")); > > this.Controls.Add(ddlSites); > > > > this.Controls.Add(WebHelper.MakeLiteral("</td></tr></table>")); > > > > this.Controls.Add(WebHelper.MakeLiteral("</td></tr><tr><td>")); this.Controls.Add(WebHelper.MakeLiteral("<table><tr><td>Classes</td><td>")); > > this.Controls.Add(ddlClasses); > > [quoted text clipped - 647 lines] > > > | Message-ID: <uRDywp7lFHA.3552@TK2MSFTNGP10.phx.gbl> > > > | Newsgroups: microsoft.public.dotnet.framework.aspnet.webcontrols,microsoft.public.dotnet > > > framework.aspnet.buildingcontrols > > > | NNTP-Posting-Host: 103nat100.tea.state.tx.us 198.214.103.100 [quoted text clipped - 53 lines] > > > | > > > > | > thanks a bunch Well Steve, I am almost done. My control works well, except its not in the framework i just mentioned. Adding my control dynamically to the datalist's item may be the root of the cause. i've made sure all custom controls implmenet INamingContainer & I think all controls have their id's set, so what else can i do? thanks a bunch > I have figured the cause of the problem, sort of. My main control was being > loaded dynamically during a custom data list control's ItemDataBound event, [quoted text clipped - 299 lines] > > > > > > this.Controls.Add(WebHelper.MakeLiteral("</td></tr><tr><td>")); this.Controls.Add(WebHelper.MakeLiteral("<table><tr><td>Providers</td><td>") > > > ); > > > [quoted text clipped - 11 lines] > > > > > > this.Controls.Add(WebHelper.MakeLiteral("</td></tr><tr><td>")); this.Controls.Add(WebHelper.MakeLiteral("<table><tr><td>Classes</td><td>")); > > > this.Controls.Add(ddlClasses); > > > [quoted text clipped - 76 lines] > > > ddlProviders.DataSource = FiscalAgentProvider.Find(fiscalAgentId, new > > > DateTime(2005,7,1), new DateTime(2006,6,30));//rysReportingYearSelector.ReportingYearStartDate, > > > rysReportingYearSelector.ReportingYearEndDate); // > > > [quoted text clipped - 572 lines] > > > > | Message-ID: <uRDywp7lFHA.3552@TK2MSFTNGP10.phx.gbl> > > > > | Newsgroups: microsoft.public.dotnet.framework.aspnet.webcontrols,microsoft.public.dotnet > > > > framework.aspnet.buildingcontrols > > > > | NNTP-Posting-Host: 103nat100.tea.state.tx.us 198.214.103.100 [quoted text clipped - 61 lines] > > > > | > > > > > | > thanks a bunch Hi TS, First, I'm glad that you've got your composite control work, all the dropdownlist's postback events can fire correctly,yes? As for the new problem you encountered when adding your composite control into DataList's item, is the DataList the asp.net's buildin DataList control? And since you mentioned that you dynamically add your control into it, how do you dynamically add your custom control? Will there occur problem if you statically add your control into DataList? Thanks, Steven Cheng Microsoft Online Support SignatureGet Secure! www.microsoft.com/security (This posting is provided "AS IS", with no warranties, and confers no rights.) -------------------- | From: "TS" <manofsteele1@nospam.nospam> | References: <uzUvXf6lFHA.1372@TK2MSFTNGP10.phx.gbl> <uRDywp7lFHA.3552@TK2MSFTNGP10.phx.gbl> <2rQIZ7$lFHA.940@TK2MSFTNGXA01.phx.gbl> <eNZro3FmFHA.1948@TK2MSFTNGP12.phx.gbl> <unRs#YGmFHA.3960@TK2MSFTNGP12.phx.gbl> <eZPM4pGmFHA.3288@TK2MSFTNGP09.phx.gbl> | Subject: Re: explanation of when need to repopulate control | Date: Wed, 3 Aug 2005 19:07:16 -0500 [quoted text clipped - 8 lines] | Path: TK2MSFTNGXA01.phx.gbl!TK2MSFTNGP08.phx.gbl!TK2MSFTNGP14.phx.gbl | Xref: TK2MSFTNGXA01.phx.gbl microsoft.public.dotnet.framework.aspnet.buildingcontrols:3989 | X-Tomcat-NG: microsoft.public.dotnet.framework.aspnet.buildingcontrols | [quoted text clipped - 320 lines] | > > > | > > > this.Controls.Add(WebHelper.MakeLiteral("</td></tr><tr><td>")); this.Controls.Add(WebHelper.MakeLiteral("<table><tr><td>Providers</td><td>") | > > > ); | > > > [quoted text clipped - 3 lines] | > > > | > > > this.Controls.Add(WebHelper.MakeLiteral("</td></tr><tr><td>")); this.Controls.Add(WebHelper.MakeLiteral("<table><tr><td>Sites</td><td>")); | > > > this.Controls.Add(ddlSites); | > > > | > > > this.Controls.Add(WebHelper.MakeLiteral("</td></tr></table>")); | > > > | > > > this.Controls.Add(WebHelper.MakeLiteral("</td></tr><tr><td>")); this.Controls.Add(WebHelper.MakeLiteral("<table><tr><td>Classes</td><td>")); | > > > this.Controls.Add(ddlClasses); | > > > [quoted text clipped - 666 lines] | > > > > | Message-ID: <uRDywp7lFHA.3552@TK2MSFTNGP10.phx.gbl> | > > > > | Newsgroups: microsoft.public.dotnet.framework.aspnet.webcontrols,microsoft.public.dotnet | > > > > framework.aspnet.buildingcontrols | > > > > | NNTP-Posting-Host: 103nat100.tea.state.tx.us 198.214.103.100 [quoted text clipped - 66 lines] | > > > > | > | > > > > | > thanks a bunch First the control works great, the main cause was it being in the datalist. The Datalist is a custom control that inherits from DataList, and overrides some stuff, but its basically a DataList. If you look thru this post, you'll see the code i attached during the onItemDataBind method when i add the control dynamically to e.Item (Get assembly then CreateInstance of class and add it in). I need to have the flexibility to dynamically add it because what gets loaded is determined from an xml document, so i dont' know ahead of time which control gets instantiated. It seems that when a postback event occurs, the control whose event handler should get run isn't, its a different control's event handler, usually the control that is above it in the control hierarchy. It seems the event handlers aren't getting wired up correctly. Any ideas on this conflict Thanks again > Hi TS, > [quoted text clipped - 372 lines] > | > > > > | > > > this.Controls.Add(WebHelper.MakeLiteral("</td></tr><tr><td>")); this.Controls.Add(WebHelper.MakeLiteral("<table><tr><td>Providers</td><td>") > | > > > ); > | > > > [quoted text clipped - 11 lines] > | > > > > | > > > this.Controls.Add(WebHelper.MakeLiteral("</td></tr><tr><td>")); this.Controls.Add(WebHelper.MakeLiteral("<table><tr><td>Classes</td><td>")); > | > > > this.Controls.Add(ddlClasses); > | > > > [quoted text clipped - 672 lines] > | > > > > | Message-ID: <uRDywp7lFHA.3552@TK2MSFTNGP10.phx.gbl> > | > > > > | Newsgroups: microsoft.public.dotnet.framework.aspnet.webcontrols,microsoft.public.dotnet > | > > > > framework.aspnet.buildingcontrols > | > > > > | NNTP-Posting-Host: 103nat100.tea.state.tx.us 198.214.103.100 [quoted text clipped - 71 lines] > | > > > > | > > | > > > > | > thanks a bunch I have double checked that all web controls have an id and all custom controls have iNamingContainer interface. What else do i need??? is there anybody else at work that may have an idea? thanks > Hi TS, > [quoted text clipped - 372 lines] > | > > > > | > > > this.Controls.Add(WebHelper.MakeLiteral("</td></tr><tr><td>")); this.Controls.Add(WebHelper.MakeLiteral("<table><tr><td>Providers</td><td>") > | > > > ); > | > > > [quoted text clipped - 11 lines] > | > > > > | > > > this.Controls.Add(WebHelper.MakeLiteral("</td></tr><tr><td>")); this.Controls.Add(WebHelper.MakeLiteral("<table><tr><td>Classes</td><td>")); > | > > > this.Controls.Add(ddlClasses); > | > > > [quoted text clipped - 672 lines] > | > > > > | Message-ID: <uRDywp7lFHA.3552@TK2MSFTNGP10.phx.gbl> > | > > > > | Newsgroups: microsoft.public.dotnet.framework.aspnet.webcontrols,microsoft.public.dotnet > | > > > > framework.aspnet.buildingcontrols > | > > > > | NNTP-Posting-Host: 103nat100.tea.state.tx.us 198.214.103.100 [quoted text clipped - 71 lines] > | > > > > | > > | > > > > | > thanks a bunch this might help to see the control's ids. What i have is the same composite control - one declared on the page statically and then one that is nested inside the custom DataList control. The actual class name is: FiscalAgentHierarchy. It is statically declared in the page as faHierARchy, and dynamically as @FiscalAgentHierarchy inside DataList (rplCriteria). Hope this helps Control Tree Control Id Type Render Size Bytes (including children) Viewstate Size Bytes (excluding children) __PAGE ASP.ReportSelection_aspx 61307 20 _ctl4 System.Web.UI.ResourceBasedLiteralControl 566 0 Form1 System.Web.UI.HtmlControls.HtmlForm 60720 0 _ctl2 TEA.ControlledLibrary.AgencyWide.Web.UI.Header 1355 0 _ctl2:_ctl6 System.Web.UI.LiteralControl 59 0 _ctl2:_ctl7 System.Web.UI.LiteralControl 29 0 _ctl2:_ctl0 System.Web.UI.WebControls.Image 89 0 _ctl2:_ctl8 System.Web.UI.LiteralControl 34 0 _ctl2:_ctl1 System.Web.UI.WebControls.HyperLink 81 0 _ctl2:_ctl9 System.Web.UI.LiteralControl 14 0 _ctl2:_ctl2 System.Web.UI.WebControls.HyperLink 121 0 _ctl2:_ctl10 System.Web.UI.LiteralControl 14 0 _ctl2:_ctl3 System.Web.UI.WebControls.HyperLink 104 0 _ctl2:_ctl11 System.Web.UI.LiteralControl 14 0 _ctl2:_ctl4 System.Web.UI.WebControls.HyperLink 102 0 _ctl2:_ctl12 System.Web.UI.LiteralControl 10 0 _ctl2:_ctl13 System.Web.UI.LiteralControl 61 0 _ctl2:_ctl5 TEA.ControlledLibrary.AgencyWide.Web.UI.ApplicationHeader 623 0 _ctl2:_ctl5:_ctl0 System.Web.UI.LiteralControl 83 0 _ctl2:_ctl5:_ctl1 System.Web.UI.LiteralControl 44 0 _ctl2:_ctl5:_ctl2 System.Web.UI.LiteralControl 55 0 _ctl2:_ctl5:_ctl3 System.Web.UI.LiteralControl 48 0 _ctl2:_ctl5:_ctl4 System.Web.UI.LiteralControl 61 0 _ctl2:_ctl5:_ctl5 System.Web.UI.LiteralControl 40 0 _ctl2:_ctl5:_ctl6 System.Web.UI.LiteralControl 74 0 _ctl2:_ctl5:_ctl7 System.Web.UI.LiteralControl 38 0 _ctl2:_ctl5:_ctl8 System.Web.UI.LiteralControl 41 0 _ctl2:_ctl5:_ctl9 System.Web.UI.LiteralControl 13 0 _ctl2:_ctl5:_ctl10 System.Web.UI.LiteralControl 66 0 _ctl5 System.Web.UI.LiteralControl 59 0 _ctl0 TEA.ControlledLibrary.AgencyWide.Web.UI.Navigation.Menu 9710 6896 _ctl0:_ctl9 System.Web.UI.LiteralControl 43 0 _ctl0:_ctl0 System.Web.UI.HtmlControls.HtmlGenericControl 164 0 _ctl0:_ctl1 System.Web.UI.HtmlControls.HtmlGenericControl 184 0 _ctl0:_ctl2 System.Web.UI.WebControls.Table 1047 0 _ctl0:_ctl10 System.Web.UI.WebControls.TableRow 875 0 _ctl0:_ctl11 System.Web.UI.WebControls.TableCell 860 0 _ctl0:_ctl3 System.Web.UI.WebControls.Table 733 0 _ctl0:_ctl12 System.Web.UI.WebControls.TableRow 581 0 _ctl0:_ctl13 System.Web.UI.WebControls.TableCell 566 0 _ctl0:_ctl4 System.Web.UI.WebControls.Image 73 0 _ctl0:_ctl5 System.Web.UI.WebControls.Literal 12 0 _ctl0:_ctl6 System.Web.UI.WebControls.Table 7534 0 _ctl0:_ctl14 System.Web.UI.WebControls.TableRow 552 0 _ctl0:_ctl15 System.Web.UI.WebControls.TableCell 537 0 _ctl0:_ctl16 System.Web.UI.WebControls.TableRow 627 0 _ctl0:_ctl17 System.Web.UI.WebControls.TableCell 613 0 _ctl0:_ctl7 System.Web.UI.WebControls.Image 70 0 _ctl0:_ctl8 System.Web.UI.WebControls.Literal 7 0 _ctl0:_ctl18 System.Web.UI.WebControls.TableRow 562 0 _ctl0:_ctl19 System.Web.UI.WebControls.TableCell 548 0 _ctl0:_ctl20 System.Web.UI.WebControls.TableRow 588 0 _ctl0:_ctl21 System.Web.UI.WebControls.TableCell 574 0 _ctl0:_ctl22 System.Web.UI.WebControls.TableRow 587 0 _ctl0:_ctl23 System.Web.UI.WebControls.TableCell 573 0 _ctl0:_ctl24 System.Web.UI.WebControls.TableRow 545 0 _ctl0:_ctl25 System.Web.UI.WebControls.TableCell 531 0 _ctl0:_ctl26 System.Web.UI.WebControls.TableRow 558 0 _ctl0:_ctl27 System.Web.UI.WebControls.TableCell 544 0 _ctl0:_ctl28 System.Web.UI.WebControls.TableRow 586 0 _ctl0:_ctl29 System.Web.UI.WebControls.TableCell 572 0 _ctl0:_ctl30 System.Web.UI.WebControls.TableRow 560 0 _ctl0:_ctl31 System.Web.UI.WebControls.TableCell 546 0 _ctl0:_ctl32 System.Web.UI.WebControls.TableRow 577 0 _ctl0:_ctl33 System.Web.UI.WebControls.TableCell 563 0 _ctl0:_ctl34 System.Web.UI.WebControls.TableRow 577 0 _ctl0:_ctl35 System.Web.UI.WebControls.TableCell 563 0 _ctl0:_ctl36 System.Web.UI.WebControls.TableRow 545 0 _ctl0:_ctl37 System.Web.UI.WebControls.TableCell 531 0 _ctl0:_ctl38 System.Web.UI.WebControls.TableRow 542 0 _ctl0:_ctl39 System.Web.UI.WebControls.TableCell 528 0 _ctl0:_ctl40 System.Web.UI.LiteralControl 5 0 _ctl6 System.Web.UI.LiteralControl 81 0 _ctl7 System.Web.UI.LiteralControl 26 0 _ctl8 System.Web.UI.LiteralControl 55 0 _ctl9 System.Web.UI.LiteralControl 8 0 _ctl1 TEA.ControlledLibrary.AgencyWide.Web.UI.Navigation.NavPath 16 0 _ctl10 System.Web.UI.LiteralControl 10 0 _ctl11 System.Web.UI.LiteralControl 8 0 _ctl12 System.Web.UI.LiteralControl 41 0 lblReportTitle System.Web.UI.WebControls.Label 98 40 _ctl13 System.Web.UI.LiteralControl 52 0 pnlBeginCriteria TEA.Teams.Web.Controls.ExpandingPanelBegin 517 0 pnlBeginCriteria:_ctl0 System.Web.UI.LiteralControl 482 0 _ctl14 System.Web.UI.LiteralControl 8 0 faHierARchy TEA.Teams.Web.ReportControls.FiscalAgentHierarchy 10195 0 faHierARchy:_ctl0 System.Web.UI.WebControls.Literal 21 0 faHierARchy:_ctl1 System.Web.UI.WebControls.Literal 20 0 faHierARchy:1 System.Web.UI.WebControls.Label 46 0 faHierARchy:_ctl2 System.Web.UI.WebControls.Literal 9 0 faHierARchy:rysReportingYearSelector TEA.Teams.Web.ReportControls.ReportingYearReportSelector 1092 0 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rplCriteria:_ctl0:@FiscalAgentHierarchy:_ctl15 System.Web.UI.WebControls.Literal 10 0 rplCriteria:_ctl0:@FiscalAgentHierarchy:_ctl16 System.Web.UI.WebControls.Literal 20 0 rplCriteria:_ctl0:@FiscalAgentHierarchy:6 System.Web.UI.WebControls.Label 0 36 rplCriteria:_ctl0:@FiscalAgentHierarchy:_ctl17 System.Web.UI.WebControls.Literal 9 0 rplCriteria:_ctl0:@FiscalAgentHierarchy:ddlClasses System.Web.UI.WebControls.DropDownList 0 44 rplCriteria:_ctl0:@FiscalAgentHierarchy:_ctl18 System.Web.UI.WebControls.Literal 10 0 _ctl16 System.Web.UI.LiteralControl 105 0 btnRun System.Web.UI.WebControls.Button 83 0 _ctl17 System.Web.UI.LiteralControl 100 0 pnlEndCriteria TEA.Teams.Web.Controls.ExpandingPanelEnd 18 0 pnlEndCriteria:_ctl0 System.Web.UI.LiteralControl 18 0 _ctl18 System.Web.UI.LiteralControl 52 0 _ctl19 System.Web.UI.LiteralControl 54 0 _ctl3 TEA.ControlledLibrary.AgencyWide.Web.UI.Footer 1043 0 _ctl3:_ctl4 System.Web.UI.LiteralControl 55 0 _ctl3:_ctl5 System.Web.UI.LiteralControl 43 0 _ctl3:_ctl6 System.Web.UI.LiteralControl 14 0 _ctl3:_ctl7 System.Web.UI.LiteralControl 44 0 _ctl3:_ctl8 System.Web.UI.LiteralControl 92 0 _ctl3:_ctl9 System.Web.UI.LiteralControl 48 0 _ctl3:_ctl10 System.Web.UI.LiteralControl 27 0 _ctl3:_ctl11 System.Web.UI.LiteralControl 37 0 _ctl3:_ctl0 System.Web.UI.WebControls.HyperLink 67 0 _ctl3:_ctl12 System.Web.UI.LiteralControl 14 0 _ctl3:_ctl1 System.Web.UI.WebControls.HyperLink 92 0 _ctl3:_ctl13 System.Web.UI.LiteralControl 14 0 _ctl3:_ctl2 System.Web.UI.WebControls.HyperLink 74 0 _ctl3:_ctl14 System.Web.UI.LiteralControl 14 0 _ctl3:_ctl3 System.Web.UI.WebControls.HyperLink 83 0 _ctl3:_ctl15 System.Web.UI.LiteralControl 10 0 _ctl3:_ctl16 System.Web.UI.LiteralControl 27 0 _ctl3:_ctl17 System.Web.UI.LiteralControl 249 0 _ctl20 System.Web.UI.LiteralControl 21 0 > Hi TS, > [quoted text clipped - 372 lines] > | > > > > | > > > this.Controls.Add(WebHelper.MakeLiteral("</td></tr><tr><td>")); this.Controls.Add(WebHelper.MakeLiteral("<table><tr><td>Providers</td><td>") > | > > > ); > | > > > [quoted text clipped - 11 lines] > | > > > > | > > > this.Controls.Add(WebHelper.MakeLiteral("</td></tr><tr><td>")); this.Controls.Add(WebHelper.MakeLiteral("<table><tr><td>Classes</td><td>")); > | > > > this.Controls.Add(ddlClasses); > | > > > [quoted text clipped - 672 lines] > | > > > > | Message-ID: <uRDywp7lFHA.3552@TK2MSFTNGP10.phx.gbl> > | > > > > | Newsgroups: microsoft.public.dotnet.framework.aspnet.webcontrols,microsoft.public.dotnet > | > > > > framework.aspnet.buildingcontrols > | > > > > | NNTP-Posting-Host: 103nat100.tea.state.tx.us 198.214.103.100 [quoted text clipped - 71 lines] > | > > > > | > > | > > > > | > thanks a bunch I have a new problem now. I have figured out that the cause is the same reason. If its in the custom DataList, it doesn't work, else it does work. The scenario: After the initial page load, you enter data into controls and hit submit button, the process is as follows: Page_Load DataList's OnLoad Composite Control's OnLoad Submit button's OnClick - At this point, the controls in the composite control have no listitems and no selectedValue properties. I have statically added the composite control onto the same page as the dynamic one, so here is the process in this scenario: Page_Load Composite Control's OnLoad (The one whose parent is Page) DataList's OnLoad Composite Control's OnLoad (The one whose parent is the Custom DataList) Submit button's OnClick - At this point, the controls in the statically declared composite control have listitems and have values for selectedValue properties. So the same control at the same time - the one outside the custom Datalist has its controls' state set up correctly, the ones inside does not. So the same reason is at play here. Maybe since i am dynamically creating the class using reflection (Assembly.CreateInstance()) that has something to do with it? Please help mr. Cheng. Thank you very much! TS > Hi TS, > [quoted text clipped - 372 lines] > | > > > > | > > > this.Controls.Add(WebHelper.MakeLiteral("</td></tr><tr><td>")); this.Controls.Add(WebHelper.MakeLiteral("<table><tr><td>Providers</td><td>") > | > > > ); > | > > > [quoted text clipped - 11 lines] > | > > > > | > > > this.Controls.Add(WebHelper.MakeLiteral("</td></tr><tr><td>")); this.Controls.Add(WebHelper.MakeLiteral("<table><tr><td>Classes</td><td>")); > | > > > this.Controls.Add(ddlClasses); > | > > > [quoted text clipped - 672 lines] > | > > > > | Message-ID: <uRDywp7lFHA.3552@TK2MSFTNGP10.phx.gbl> > | > > > > | Newsgroups: microsoft.public.dotnet.framework.aspnet.webcontrols,microsoft.public.dotnet > | > > > > framework.aspnet.buildingcontrols > | > > > > | NNTP-Posting-Host: 103nat100.tea.state.tx.us 198.214.103.100 [quoted text clipped - 71 lines] > | > > > > | > > | > > > > | > thanks a bunch Thanks for your followup TS. So can I say that currently your custom webcontrol(not template list control) can correctly be added both statically and dynamically in the normal DataList or Repeater controls (asp.net buildin ) , but have some problem for postback events when added in your custom list control? If so, we should keep focus on the custom datalist control. Has it any problems when we nest some asp.net buildin controls in it? Would you try making a simplified version of your custom datalist control so that we can have a view to see whether there is anything wrong in it. Also, it'll be helpful you also provide the complete code that you dynamically add control into the datalist (through reflection). Thanks, Steven Cheng Microsoft Online Support SignatureGet Secure! www.microsoft.com/security (This posting is provided "AS IS", with no warranties, and confers no rights.) -------------------- | From: "TS" <manofsteele1@nospam.nospam> | References: <uzUvXf6lFHA.1372@TK2MSFTNGP10.phx.gbl> <uRDywp7lFHA.3552@TK2MSFTNGP10.phx.gbl> <2rQIZ7$lFHA.940@TK2MSFTNGXA01.phx.gbl> <eNZro3FmFHA.1948@TK2MSFTNGP12.phx.gbl> <unRs#YGmFHA.3960@TK2MSFTNGP12.phx.gbl> <eZPM4pGmFHA.3288@TK2MSFTNGP09.phx.gbl> <#HbW7hImFHA.1464@TK2MSFTNGP14.phx.gbl> <$gerkvLmFHA.3672@TK2MSFTNGXA01.phx.gbl> | Subject: Re: explanation of when need to repopulate control | Date: Fri, 5 Aug 2005 17:19:23 -0500 [quoted text clipped - 8 lines] | Path: TK2MSFTNGXA01.phx.gbl!TK2MSFTNGP08.phx.gbl!TK2MSFTNGP15.phx.gbl | Xref: TK2MSFTNGXA01.phx.gbl microsoft.public.dotnet.framework.aspnet.buildingcontrols:4003 | X-Tomcat-NG: microsoft.public.dotnet.framework.aspnet.buildingcontrols | [quoted text clipped - 420 lines] | > | > > > | > | > > > this.Controls.Add(WebHelper.MakeLiteral("</td></tr><tr><td>")); this.Controls.Add(WebHelper.MakeLiteral("<table><tr><td>Providers</td><td>") | > | > > > ); | > | > > > [quoted text clipped - 3 lines] | > | > > > | > | > > > this.Controls.Add(WebHelper.MakeLiteral("</td></tr><tr><td>")); this.Controls.Add(WebHelper.MakeLiteral("<table><tr><td>Sites</td><td>")); | > | > > > this.Controls.Add(ddlSites); | > | > > > | > | > > > this.Controls.Add(WebHelper.MakeLiteral("</td></tr></table>")); | > | > > > | > | > > > this.Controls.Add(WebHelper.MakeLiteral("</td></tr><tr><td>")); this.Controls.Add(WebHelper.MakeLiteral("<table><tr><td>Classes</td><td>")); | > | > > > this.Controls.Add(ddlClasses); | > | > > > [quoted text clipped - 77 lines] | > new | > | > > > DateTime(2005,7,1), new DateTime(2006,6,30));//rysReportingYearSelector.ReportingYearStartDate, | > | > > > rysReportingYearSelector.ReportingYearEndDate); // | > | > > > [quoted text clipped - 600 lines] | > | > > > > | Message-ID: <uRDywp7lFHA.3552@TK2MSFTNGP10.phx.gbl> | > | > > > > | Newsgroups: microsoft.public.dotnet.framework.aspnet.webcontrols,microsoft.public.dotnet | > | > > > > framework.aspnet.buildingcontrols | > | > > > > | NNTP-Posting-Host: 103nat100.tea.state.tx.us 198.214.103.100 [quoted text clipped - 81 lines] | > | > > > > | > | > | > > > > | > thanks a bunch Well you were right that it had something to do with the custom control. The datalist was trying to load itself during page load. i put the code in Init, and it worked. thanks steven > Thanks for your followup TS. > [quoted text clipped - 458 lines] > | > | > > > > | > | > > > // this.Controls.Add(rysReportingYearSelector); this.Controls.Add(WebHelper.MakeLiteral("</td></tr></table>")); this.Controls.Add(WebHelper.MakeLiteral("</td></tr><tr><td>")); > | > | > > > this.Controls.Add(WebHelper.MakeLiteral("<table><tr><td>")); > | > | > > > > | > | > > > // this.Controls.Add(fasFiscalAgent); this.Controls.Add(WebHelper.MakeLiteral("</td></tr></table>")); this.Controls.Add(WebHelper.MakeLiteral("</td></tr><tr><td>")); this.Controls.Add(WebHelper.MakeLiteral("<table><tr><td>Funding > | > | > > > Source</td><td>")); > | > | > > > > | > | > > > this.Controls.Add(ddlFundingSource); this.Controls.Add(WebHelper.MakeLiteral("</td></tr></table>")); this.Controls.Add(WebHelper.MakeLiteral("</td></tr><tr><td>")); this.Controls.Add(WebHelper.MakeLiteral("<table><tr><td>Providers</td><td>") > | > | > > > ); > | > | > > > > | > | > > > this.Controls.Add(ddlProviders); |
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