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9.3

Catching click event inside an UpdatePanel of a User Control

Asked by jensfiederer in C# Programming Language, Programming for ASP.NET, .NET

Tags: c#

I was experimenting with dynamically loaded user controls.  

For some reason, when I load (from PickListUser) my PickList control, the control is displayed reasonably - with Region.xml as given, the repeater shows two lines with a name and button on each.

However, when I click the button, ONLY the load code on my host page (PickListUser) is called (with IsPostBack==true), neither the load event nor the click event on the PickList code behind are triggered. 
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Picklist.ascx:
---------------------------------
<%@ Control Language="C#" AutoEventWireup="true" CodeFile="Picklist.ascx.cs" Inherits="Picklist" %>
<input type="hidden" runat="server" ID="path" />
<input type="hidden"  runat="server" ID="parent" />
<asp:Repeater ID="Repeater1" runat="server" >
<ItemTemplate>
<asp:UpdatePanel runat="server" ID="mypanel" UpdateMode="Conditional">
<ContentTemplate>
<asp:Label runat="server" ID="name" Text='<%# Eval("Name") %>' />
<asp:Button runat="server" ID="select" Text="select"  /><br />
<asp:Label runat="server" ID="display" />
</ContentTemplate>
</asp:UpdatePanel>
</ItemTemplate>
</asp:Repeater>
 
 
Picklist.ascx.cs:
---------------------------------
using System;
using System.Collections.Generic;
using System.Linq;
using System.Xml;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
 
public partial class Picklist : System.Web.UI.UserControl
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            string[] elements = path.Value.Split(',');
            XmlDataSource source = new XmlDataSource();
            source.DataFile = "App_Data/" + elements[0] + ".xml";
            Repeater1.DataSource = source;
            Repeater1.DataBind();
        }
        foreach (RepeaterItem x in Repeater1.Items)
        {
            (x.Controls[1].Controls[0].Controls[3] as Button).Click += Command;
        }
    }
 
 
    protected void Command(object source, EventArgs e)
    {
        display.Text = "foo";
    }
}
 
PickListUser.aspx
---------------------------------
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="PickListUser.aspx.cs" Inherits="PickListUser" %>
 
<!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">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    User!
<asp:ScriptManager runat="server" ID="mgr" />
    </div>
    </form>
</body>
</html>
 
 
PicklistUser.ascx.cs:
---------------------------------
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
 
public partial class PickListUser : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            Control main = LoadControl("~/Picklist.ascx");
            HtmlInputHidden path = main.FindControl("path") as HtmlInputHidden;
            path.Value = "region,country,call";
            FindControl("form1").Controls.Add(main);
            mgr.RegisterAsyncPostBackControl(main);
        }
    }
}
 
 
Region.xml
---------------------------------
<?xml version="1.0" encoding="utf-8" ?>
<regions>
  <region name="america" id="1" parent="0"/>
  <region name="europe" id="2" parent="0"/>
</regions>
[+][-]07/06/09 11:41 AM, ID: 24787982Accepted Solution

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About this solution

Zones: C# Programming Language, Programming for ASP.NET, .NET
Tags: c#
Sign Up Now!
Solution Provided By: TheLearnedOne
Participating Experts: 1
Solution Grade: A
 
 
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