Grid within a Grid ItemDataBound event problem

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Girish - 18 Jul 2005 22:23 GMT

Im trying to create a grid within a grid programmatically. Ive been
successful in doing this but I need the embedded grid to fire its
ItemDataBound event so I can handle it. The event does not seem to fire for
some reason. The code is below.

Look towards the end of the CustomerDataGrid_OnItemDataBound(object sender,
DataGridItemEventArgs e) method. This is where I register the event and
place the programmatically created grid into the main grid. The registered
event does not cause the OrdersDataGrid_ItemDataBound to run.

Appreciate anyones help.

Thanks,
Girish

> ------------
> ASPX File
> -----------

<%@ Page language="c#" Inherits="MasterDetail.CustomerOrderDataGrid"
EnableViewState="False" CodeBehind="CustomerOrderDataGrid.aspx.cs"
AutoEventWireup="false" %>
<HTML>
<body style="FONT: x-small Verdana, Arial, sans-serif">

<form id="CustomerOrderDataGrid" method="post" runat="server">
<a href="/DayOfDotNet/">Parent Directory</a>

<asp:DataGrid id="CustomerDataGrid" runat="server"
AutoGenerateColumns="False" CellPadding="2"
CellSpacing="0" Font-Names="Verdana, Arial, sans-serif"
BorderColor="Black" BorderWidth="1"
GridLines="Horizontal"
OnItemDataBound="CustomerDataGrid_OnItemDataBound" EnableViewState="False">
<AlternatingItemStyle BackColor="Tan"></AlternatingItemStyle>
<ItemStyle Font-Size="X-Small"></ItemStyle>
<HeaderStyle Font-Size="Small" Font-Names="Arial" Font-Bold="True"
ForeColor="White" BackColor="Maroon"></HeaderStyle>
<Columns>
<asp:BoundColumn Visible="False"
DataField="CustomerID"></asp:BoundColumn>
<asp:HyperLinkColumn
DataTextField="CustomerID"
DataNavigateUrlField="CustomerID"
DataNavigateUrlFormatString="OrderDetailDataGrid.aspx?customerid={0}"
HeaderText="ID"
ItemStyle-VerticalAlign="Top" />

<asp:TemplateColumn HeaderText="Customer">
<ItemStyle VerticalAlign="Top"></ItemStyle>
<ItemTemplate>

<%# DataBinder.Eval(Container.DataItem, "CompanyName") %>

 
<%# DataBinder.Eval(Container.DataItem, "Address" ) %>
 
<%# DataBinder.Eval(Container.DataItem, "City" ) %>
,
<%# DataBinder.Eval(Container.DataItem, "Region") %>
<%# DataBinder.Eval(Container.DataItem, "PostalCode" ) %>
 
 
<%# DataBinder.Eval(Container.DataItem, "ContactName" ) %>
 
<%# DataBinder.Eval(Container.DataItem, "ContactTitle" ) %>
 
<%# DataBinder.Eval(Container.DataItem, "Phone" ) %>
</ItemTemplate>
</asp:TemplateColumn>
<asp:TemplateColumn ItemStyle-VerticalAlign="Top"
HeaderText="Orders">
<%-- Embedded DataGrid will go here --%>
</asp:TemplateColumn>
</Columns>
</asp:DataGrid>

</form>

</body>
</HTML>

---------------------
CODE BEHIND
----------------------
using System;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Configuration;

namespace MasterDetail
{
public class CustomerOrderDataGrid : System.Web.UI.Page
{
protected DataGrid CustomerDataGrid;
private DataSet ds = new DataSet();

private void Page_Load(object sender, System.EventArgs e)
{
string sqlStmt = "SELECT top 2 * FROM Customers; SELECT * FROM Orders";
string conString =
"server=localhost;database=Northwind;uid=sa;pwd=tietronix;";

SqlDataAdapter sda = new SqlDataAdapter(sqlStmt, conString);

sda.Fill(ds);
ds.Tables[0].TableName = "Customers";
ds.Tables[1].TableName = "Orders";

CustomerDataGrid.DataSource = ds.Tables["Customers"];
CustomerDataGrid.DataBind();
}

//Use the OnItemDataBound event handler to dynamically add an embedded
DataGrid
protected void CustomerDataGrid_OnItemDataBound(object sender,
DataGridItemEventArgs e)
{
//When each row is created in the DataGrid, eval the ItemType
if(e.Item.ItemType == ListItemType.Item ||
e.Item.ItemType == ListItemType.AlternatingItem)
{
//If the ItemType is Item or AlternatingItem,
//Create a new DataGrid object named OrdersDataGrid
DataGrid OrdersDataGrid = new DataGrid();

//Format the DataGrid to look cool.
OrdersDataGrid.BorderWidth = (Unit)1;
OrdersDataGrid.CellPadding = 4;
OrdersDataGrid.CellSpacing = 0;
OrdersDataGrid.GridLines = GridLines.Horizontal;
OrdersDataGrid.BorderColor = Color.FromName("Black");

OrdersDataGrid.ItemStyle.Font.Name = "Verdana";
OrdersDataGrid.ItemStyle.Font.Size = FontUnit.XSmall;

OrdersDataGrid.AlternatingItemStyle.BackColor =
Color.FromName("LightGray");

OrdersDataGrid.ShowHeader = true;
OrdersDataGrid.HeaderStyle.BackColor = Color.FromName("Black");
OrdersDataGrid.HeaderStyle.ForeColor = Color.FromName("White");
OrdersDataGrid.HeaderStyle.Font.Bold = true;
OrdersDataGrid.HeaderStyle.Font.Size = FontUnit.XSmall;

//Do not autogenerate columns.
OrdersDataGrid.AutoGenerateColumns = false;

//Add a series of BoundColumns
//Order ID
BoundColumn bc = new BoundColumn();
//Set the BoundColumn Values
bc.HeaderText = "Order ID";
bc.DataField = "OrderID";
bc.ItemStyle.Wrap = false;
//Add the BoundColumn to the OrdersDataGrid.
OrdersDataGrid.Columns.Add(bc);

//Order Date
bc = new BoundColumn();
bc.HeaderText = "Order Date";
bc.DataField = "OrderDate";
bc.DataFormatString="{0:d}";
bc.ItemStyle.Wrap = false;
OrdersDataGrid.Columns.Add(bc);

//Required Date
bc = new BoundColumn();
bc.HeaderText = "Required Date";
bc.DataField = "RequiredDate";
bc.DataFormatString="{0:d}";
bc.ItemStyle.Wrap = false;
OrdersDataGrid.Columns.Add(bc);

//Shipped Date
bc = new BoundColumn();
bc.HeaderText = "Shipped Date";
bc.DataField = "ShippedDate";
bc.DataFormatString="{0:d}";
bc.ItemStyle.Wrap = false;
OrdersDataGrid.Columns.Add(bc);

//End BoundColumns
TemplateColumn tc = new TemplateColumn();
tc.HeaderText = "Drop Down Menu";
OrdersDataGrid.Columns.Add(tc);

//Get the Authors DataView and filter it for the current ISBN
DataView _orders = ds.Tables["Orders"].DefaultView;
_orders.RowFilter = "CustomerID='" + e.Item.Cells[0].Text + "'";

//Bind the DataGrid.
OrdersDataGrid.DataSource = _orders;
OrdersDataGrid.DataBind();

// ADD THE EVENT TO THE EMBEDDED GRID HERE
OrdersDataGrid.ItemDataBound += new
System.Web.UI.WebControls.DataGridItemEventHandler(this.OrdersDataGrid_ItemDataBound);
//Add the OrdersDataGrid to the BooksDataGrid.
e.Item.Cells[3].Controls.Add(OrdersDataGrid);
}
}

private void OrdersDataGrid_ItemDataBound(object sender,
System.Web.UI.WebControls.DataGridItemEventArgs e)
{
//CODE NEVER REACHES HERE.
int i=1;
i=10 + 12;
}

override protected void OnInit(EventArgs e)
{
//
// CODEGEN: This call is required by the ASP.NET Web Form Designer.
//
InitializeComponent();
base.OnInit(e);
}

private void InitializeComponent()
{
this.CustomerDataGrid.ItemCreated += new
System.Web.UI.WebControls.DataGridItemEventHandler(this.CustomerDataGrid_ItemCreated);
//this.CustomerDataGrid.ItemDataBound += new
System.Web.UI.WebControls.DataGridItemEventHandler(this.CustomerDataGrid_OnItemDataBound);
this.Load += new System.EventHandler(this.Page_Load);

}

private void CustomerDataGrid_ItemCreated(object sender,
System.Web.UI.WebControls.DataGridItemEventArgs e)
{
int i=1;
i=10 + 12;
}
}
}

Reply to this Message

Phillip Williams - 18 Jul 2005 23:09 GMT

You should add the event handler before you execute the
OrdersDataGrid.DataBind() method.

I have 2 samples of a several-levels hierarchical datagrid working on my
website using both the datagrid server control and the HTML Table:
http://www.societopia.net/samples/webform2.aspx
http://www.societopia.net/samples/webform1.aspx

Signature

http://www.webswapp.com

> Im trying to create a grid within a grid programmatically. Ive been
> successful in doing this but I need the embedded grid to fire its
[quoted text clipped - 238 lines]
> }
> }

Reply to this Message

vinay - 18 Jul 2005 23:16 GMT

Nice samples Philip

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http://pathidotnet.blogspot.com
=====
vInAypAtHi
o__
---_,>/'_------
(_) \(_)
---------------

> You should add the event handler before you execute the
> OrdersDataGrid.DataBind() method.
[quoted text clipped - 246 lines]
> > }
> > }

Reply to this Message

Girish - 19 Jul 2005 00:30 GMT

Thanks Phillip. This helps.

Girish

> You should add the event handler before you execute the
> OrdersDataGrid.DataBind() method.
[quoted text clipped - 252 lines]
>> }
>> }

Reply to this Message

Patrick.O.Ige - 19 Jul 2005 02:17 GMT

Good one Phillips!

> You should add the event handler before you execute the
> OrdersDataGrid.DataBind() method.
[quoted text clipped - 47 lines]
> > DataTextField="CustomerID"
> > DataNavigateUrlField="CustomerID"

DataNavigateUrlFormatString="OrderDetailDataGrid.aspx?customerid={0}"

> > HeaderText="ID"
> > ItemStyle-VerticalAlign="Top" />
[quoted text clipped - 153 lines]
> > // ADD THE EVENT TO THE EMBEDDED GRID HERE
> > OrdersDataGrid.ItemDataBound += new

System.Web.UI.WebControls.DataGridItemEventHandler(this.OrdersDataGrid_ItemD
ataBound);

> > //Add the OrdersDataGrid to the BooksDataGrid.
> > e.Item.Cells[3].Controls.Add(OrdersDataGrid);
[quoted text clipped - 21 lines]
> > {
> > this.CustomerDataGrid.ItemCreated += new

System.Web.UI.WebControls.DataGridItemEventHandler(this.CustomerDataGrid_Ite
mCreated);

> > //this.CustomerDataGrid.ItemDataBound += new

System.Web.UI.WebControls.DataGridItemEventHandler(this.CustomerDataGrid_OnI
temDataBound);

> > this.Load += new System.EventHandler(this.Page_Load);
> >
[quoted text clipped - 8 lines]
> > }
> > }

Reply to this Message

Grid within a Grid ItemDataBound event problem

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