Hello,

Request.QueryString allows to read querystring parameters during a postback.
Is this what you are looking for ?

--
Patrice

Hi Rod
Sometimes when there is no another option I use this trick below
(there are two pages):

Page 1 : HiddenValue.aspx
---------------------------------------
<%@ Page Language="c#" Debug="true" %>
<%@ Import Namespace="System.Text" %>

<script language="c#" runat="server">
public void ButtonConfirmar1_Click (object sender, EventArgs e)
{
    Hidden1.Value = TextBox1.Text.ToUpper();
    Hidden2.Value = TextBox2.Text.ToUpper();

    // javascript: watch out with the Form's name (here is Form1)
    StringBuilder script = new StringBuilder();
    script.AppendFormat("<script language='javascript'>");
   
script.AppendFormat("document.getElementById('Form1').action='HiddenValueProcess.aspx';");
    script.AppendFormat("document.forms[0].__VIEWSTATE.name =
'NOVIEWSTATE';");
    script.AppendFormat("document.getElementById('Form1').submit();</
script>");;

    Page.RegisterStartupScript("submitForm", script.ToString());
}
</script>

<form id="Form1" method="post" runat="server">
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<asp:TextBox ID="TextBox2" runat="server"></asp:TextBox>

<INPUT id="Hidden1" runat="server" type="hidden">
<INPUT id="Hidden2" runat="server" type="hidden">

<asp:Button ID="ButtonConfirmar1" runat="server" Text="Confirmar"
OnClick="ButtonConfirmar1_Click"/>
</form>

Page 1 : HiddenValueProcess.aspx
---------------------------------------------------
private void Page_Load(object sender, System.EventArgs e)
{
    if (!Page.IsPostBack)
    {
        string value1 = Request.Form["Hidden1"].ToString();
        string value2 = Request.Form["Hidden2"].ToString();

        Response.Write("<p>Valor 1=" + value1);
        Response.Write("<p>Valor 2=" + value2);
    }
}

This is what are you looking for. aren't you?