I see a lot of people have been asking this question, some was because of the if postback check , but mine is different. i am using AjaxModalExtender to show my popup on the server side. this is my markup
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="TestPage.aspx.cs" Inherits="PopTester.TestPage" %>
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="asp" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<style type="text/css">
.modalBackground
{ background-color: Yellow;
filter: alpha(opacity=60);
opacity: 0.6;
}
</style>
<title></title>
</head>
<body>
<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<asp:Panel ID="Panel1" runat="server">
<asp:Button ID="Button1" runat="server"
Text="CreateModal" OnClick="Button1_Click" />
</asp:Panel>
<asp:Panel ID="ModalPanel" runat="server" Style="display: none" HorizontalAlign="Center" BackColor="Green">
<div>
<asp:UpdatePanel ID="Update" runat="server">
<ContentTemplate>
<asp:GridView ID="GridView1" AutoGenerateColumns="false" runat="server" Height="176px" Width="453px">
<Columns>
<asp:TemplateField HeaderText="ID">
<ItemTemplate>
<asp:CheckBox ID="chkId" runat="server" />
<asp:Label ID="lblId" runat="server" Text='<%#Eval("ID")%>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Name">
<ItemTemplate>
<asp:Label ID="lblname" runat="server" Text='<%#Eval("Name") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Lastname">
<ItemTemplate>
<asp:Label ID="lblLastname" runat="server" Text='<%#Eval("Lastname") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
<asp:Button ID="btnPickrecord" runat="server" Text="Pick Record"
onclick="btnPickrecord_Click " />
<asp:Button ID="btnload" runat="server" onclick="btnload_Click"
Text="Load Data" />
</ContentTemplate>
</asp:UpdatePanel>
</div>
<asp:Button ID="btnCancel" runat="server" Text="Close Me"
onclick="btnCancel_Click" />
</asp:Panel>
<asp:TextBox ID="txtreference" runat="server" AutoPostBack="True"></asp:TextBox>
<p>
</p>
</form>
</body>
</html>as you can see i have a gridview that will be on the modal and its working fine, now after the grid has returned some results, i will select one record via the checkbox on the Grid and click the button "btnPickrecord" and this will fire my server side code
protected void btnPickrecord_Click(object sender, EventArgs e)
{
foreach (GridViewRow dataItem in GridView1.Rows)
{
CheckBox chkselect = (CheckBox)dataItem.FindControl("chkId");
if (dataItem.RowType == DataControlRowType.DataRow)
{
if (chkselect.Checked)
{
Label lblReferenceNumberID = (Label)dataItem.FindControl("lblId");
txtreference.Text = lblReferenceNumberID.Text;
}
}
}
}the breakpoints got a hit and i stepped through it and i the value get assigned to the textbox <b> txtreference.Text</b> , but when i close the modal the textbox is empty , or while the modal is open i can see the value does not reflect in the parent page. Here is the Code for invoking the modal
protected void Button1_Click(object sender, EventArgs e)
{
AjaxControlToolkit.ModalPopupExtender modalPop = new AjaxControlToolkit.ModalPopupExtender();
modalPop.ID = "popUp";
modalPop.PopupControlID = "ModalPanel";
modalPop.TargetControlID = "Button1";
modalPop.DropShadow = true;
modalPop.BackgroundCssClass = "modalBackground";
modalPop.CancelControlID = "btnCancel";
this.Panel1.Controls.Add(modalPop);
modalPop.Show();
}Thanks