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OnCommand is not getting triggered and the debugger is not moving to Code Behind in Asp.net

<div class="dt_content">
<asp:UpdatePanel runat="server" ID="AlertUpdatePanel">
<ContentTemplate>
<UserControl:ApplicationAlert runat="server" ID="ApplicationAlert" />
<UserControl:ApplicationAlert runat="server" ID="PersonalEssayAlert" Visible="false" />
<boas:KeyDates ID="KeyDates" runat="server" Visible="false" />
</ContentTemplate>
</asp:UpdatePanel>
<boas:OtherDocs ID="OtherDocs" runat="server" />
<input type="hidden" runat="server" id="AppDetailsHidden" />
<% var dummy = 0; %>
<% if (IsRep || IsAdmin)
{ %>
<%=ResourceUtility.GetThemeResource("Copy", "Instructions_DocumentTracker_RepAdmin")%>
<% }
else
{ %>
<%=ResourceUtility.GetThemeResource("Copy", "Instructions_DocumentTracker")%>
<% } %>
<!-- Accordian Menu -->
<asp:Repeater ID="DocumentListingRepeater" runat="server" OnItemCreated="DocumentListingRepeater_ItemCreated">
<ItemTemplate>
<ul class="CollapsiblePanelGroup">
<li id="SectionLI" runat="server">
<div>
<ul>
<li class="category">
<h3>
<asp:LinkButton ID="OpenDocumentsLinkButton" runat="server" OnClientClick='<%#"return ToggleDocTrackerPanel(" + Convert.ToChar(39) + "cat" + (((RepeaterItem)Container).ItemIndex).ToString() + Convert.ToChar(39) + ")" %>'
OnCommand="OpenDocumentsLinkButton_Command" CommandArgument='<%#DataBinder.Eval(Container.DataItem,"DocumentCategoryID") %>'><img id="toggle<%#(((RepeaterItem)Container).ItemIndex).ToString()%>" alt="" class="toggle" src="../Images/plus.png" /></asp:LinkButton><a
href='Details.aspx?section=<%# DataBinder.Eval(Container.DataItem, "DocumentCategoryID")%>'><%# DataBinder.Eval(Container.DataItem, "DocumentCategoryDescription")%></a></h3>
</li>
<li id="StatusLI" runat="server">
<h3>
<asp:Literal ID="StatusLiteral" runat="server" /></h3>
</li>
</ul>
</div>
<div id="cat<%#(((RepeaterItem)Container).ItemIndex).ToString()%>" class="CollapsiblePanelContent">
<asp:UpdatePanel ID="DocumentTrac" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<asp:PlaceHolder ID="DocumentTrackerPlaceHolder" runat="server">
<div style="text-align: center">
Loading
<br />
<img runat="server" alt="Please wait." src="~/images/loading2.gif" />
</div>
</asp:PlaceHolder>
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="OpenDocumentsLinkButton" />
</Triggers>
</asp:UpdatePanel>
</div>
</li>
</ul>
</ItemTemplate>
</asp:Repeater>
<div style="text-align: center;" runat="server" id="applicationRequirementsPanel">
<a runat="server" id="modalButton">
<asp:Image ID="Image1" runat="server" SkinID="img_appReq" /></a>
</div>
<script type="text/javascript">
ToggleDocTrackerPanel();
</script>
</div>
Hi there!
The code snippet I shared, updates the content inside the content panel.
So we have different user roles, and when running the application as a normal user the OnCommand event gets triggered accordingly, gets all the content from the backend, and updates the 'Please Wait' text with the received content inside the Update Panel, but when I try to log in as Admin the same exact piece of code runs but the OnCommand event does not get triggered.
I tried adding the even name but that does not work.
During the page load I can see the data is getting bounded properly(as it is working fine when logged in a normal user).
Being a backend developer I am not that much familiar with this frontend technology, So little help or explanation would be appreciated. Thanks!

fire a textbox's OnTextChanged while enabled=false

I have an ajax toolkit calendar extender attached to my textbox and i a trying to fire the OnTextChanged after the date was entered into the textbox.
The thing is i don't want the user to enter data manually so i disabled the textbox but the event won't fire for a disabled text box.
is there anyway around it? i thought about changing to a label but is doesn't have OnTextChanged event.
Thanks
<asp:TableCell CssClass="cssWidth" Width="150px">
<asp:CalendarExtender ID="CalendarExtender1" PopupButtonID="Image1" runat="server" TargetControlID="TextBoxAddDate" Format="dd/MM/yyyy"></asp:CalendarExtender>
<asp:TextBox ID="TextBoxAddDate" ReadOnly="true" CssClass="cssWidth" ToolTip="תאריך הוספה" runat="server" Style="font-size: large;background-color:aliceblue;" AutoPostBack="true" AutoCompleteType="Search" MaxLength="0" TextMode="SingleLine" OnTextChanged="txtSearch_TextChanged" ViewStateMode="Enabled" autocomplete="off" >
</asp:TextBox>&nbsp
<asp:ImageButton runat="Server" ID="Image1"
ImageUrl="~/Calendar_scheduleHS.png" AlternateText="Click to show calendar" /><br />
</asp:TableCell>

Can you use ReadOnly instead of Enabled = false?
UPDATE:
Ok, this is the complete solution that worked for me:
<%# Page Title="Home Page" Language="C#" MasterPageFile="~/Site.master" AutoEventWireup="true"
CodeBehind="Default.aspx.cs" Inherits="WebApplication1._Default" %>
<%# Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="asp" %>
<asp:Content ID="HeaderContent" runat="server" ContentPlaceHolderID="HeadContent">
<script type="text/javascript">
function dateSelectionChanged(x) {
debugger;
javascript: __doPostBack('TextBoxAddDate', '')
}
</script>
</asp:Content>
<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent">
<asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager>
<h2>
Welcome to ASP.NET!
</h2>
<p>
To learn more about ASP.NET visit www.asp.net.
</p>
<p>
You can also find <a href="http://go.microsoft.com/fwlink/?LinkID=152368&clcid=0x409"
title="MSDN ASP.NET Docs">documentation on ASP.NET at MSDN</a>.
</p>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:CalendarExtender ID="CalendarExtender1" PopupButtonID="Image1" runat="server" TargetControlID="TextBoxAddDate" Format="dd/MM/yyyy" OnClientDateSelectionChanged="dateSelectionChanged" ></asp:CalendarExtender>
<asp:TextBox ID="TextBoxAddDate" CssClass="cssWidth" ToolTip="תאריך הוספה" runat="server" Style="font-size: large;background-color:aliceblue;" AutoCompleteType="Search" MaxLength="0" TextMode="SingleLine" OnTextChanged="txtSearch_TextChanged" ViewStateMode="Enabled">
</asp:TextBox>&nbsp
<asp:ImageButton runat="Server" ID="Image1"
ImageUrl="~/Calendar_scheduleHS.png" AlternateText="Click to show calendar" /><br />
</ContentTemplate>
</asp:UpdatePanel>
</asp:Content>
It seems that the CalendarExtender "steals" away the events from the texbox it uses.
Using this approach I managed to fire up the OnTextChanged event and the handler txtSearch_TextChanged gets executed.

Did you make the textbox ReadOnly?

triggered button cause fullpostback

I've got an updatePanel and a button which triggered in it.
However, the button causes full postback instead of partial one.
Here's my Code:
<asp:Button ID="cEvent" runat="server" Text="צור יום" Width="80px"
Height="40px" Font-Size="Medium" onclick="cEvent_Click" CausesValidation="false"/>
<asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager>
<asp:UpdatePanel id = "updatePanel1" runat="server" UpdateMode="Conditional">
<Triggers>
<asp:AsyncPostBackTrigger ControlID="cEvent" EventName="Click"/>
</Triggers>
<ContentTemplate>
<div id="yesEve" runat="server" visible="false" style="width:95%; float:right; margin-left:5%; padding-top:20px; margin-bottom:20px;">
<table id="mytable" cellspacing="0" runat="server">
</table>
</div>
<div id="errorMsg" runat="server" visible="false" style="width:100%; text-align:center; float:right;">
<asp:label visible="true" ID="msg1" Font-Size="Medium" runat="server" Font-Bold="true" Text = "היום נמחק בהצלחה"></asp:label>
</div>
<div id="noEve" style="width:100%; padding-top:20px; float:right; text-align:center; margin-bottom:20px;" runat="server" visible="false">
<asp:label visible="true" ID="stamLabel" Font-Size="Medium" runat="server" Font-Bold="true" Text = "לא קיימים ימים פתוחים"></asp:label>
</div>
<asp:LinkButton ID ="remove" runat="server"></asp:LinkButton>
</ContentTemplate>
</asp:UpdatePanel>
I really need some help with that... i'm searching for hours all over the web to find an answer.
Thanks, Matan

In the code behind, you can try adding this line:
ScriptManager.GetCurrent(Page).RegisterPostBackControl(Button1);

There is nothing wrong with your code, you have a conflict somewhere with code(ClientIDs) you haven't show us or a JavaScript error breaking the page.

Here's a template for how to do this from a microsoft tutorial page:
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<fieldset>
<legend>UpdatePanel</legend>
<asp:Label ID="Label1" runat="server" Text="Panel created."></asp:Label><br />
</fieldset>
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="Button1" />
</Triggers>
</asp:UpdatePanel>
<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Button" />
More information here:
microsoft tutorial

Error while deleting all child controls from the parent control

I have the next aspx page:
<%# Page Title="" Language="C#" MasterPageFile="~/MasterPage.Master" AutoEventWireup="true"
CodeBehind="newsEditor.aspx.cs" Inherits="ExpertSiteV2.newsEditor" %>
<%# Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="asp" %>
<%# Register Assembly="ExpertSiteV2" Namespace="ExpertSiteV2" TagPrefix="custom" %>
<asp:Content ID="Content3" ContentPlaceHolderID="Main" runat="server">
<asp:Panel ID="Panel1" runat="server">
<asp:Panel ID="Panel2" runat="server" Width="660" Style="margin-bottom: 10px;">
<asp:Label ID="Label1" runat="server" Text="Label" Width="150">Заголовок новости</asp:Label>
<asp:TextBox ID="newsTitle" runat="server" Width="500" Style="float: right;"></asp:TextBox>
</asp:Panel>
<custom:CustomEditor ID="Editor3" runat="server" Height="300" Width="660" BackColor="White" />
<asp:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server">
</asp:ToolkitScriptManager>
<asp:Panel ID="Panel3" runat="server" Style="margin-top: 5px;" CssClass="buttonPanel">
<asp:ImageButton ID="SaveImageButton1" runat="server" ImageUrl="img/save_32.png"
ToolTip="Сохранить новость" />
<asp:LinkButton ID="SaveLinkButton1" runat="server" ToolTip="Сохранить новость">Сохранить</asp:LinkButton>
<asp:ImageButton ID="ImageButton2" runat="server" CausesValidation="False" ImageUrl="img/block_32.png"
PostBackUrl="news.aspx" ToolTip="Вернуться к странице новостей" />
<asp:LinkButton ID="LinkButton2" runat="server" ToolTip="Вернуться к странице новостей"
CausesValidation="False" PostBackUrl="news.aspx">Отмена</asp:LinkButton>
</asp:Panel>
<asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ErrorMessage="Заголовок должен быть заполнен!"
ControlToValidate="newsTitle" Display="Dynamic">
</asp:RequiredFieldValidator>
</asp:Panel>
</asp:Content>
I want to delete all the contents of Panel1. I write the code:
Panel1.Controls.Clear();
But it doesn't work and I get the message:
Page cannot be null. Please ensure
that this operation is being performed
in the context of an ASP.NET request.
Description: An unhandled exception
occurred during the execution of the
current web request. Please review the
stack trace for more information about
the error and where it originated in
the code.
Exception Details:
System.InvalidOperationException: Page
cannot be null. Please ensure that
this operation is being performed in
the context of an ASP.NET request.
Source Error:
An unhandled exception was generated
during the execution of the current
web request. Information regarding the
origin and location of the exception
can be identified using the exception
stack trace below.
Stack Trace:
[InvalidOperationException: Page
cannot be null. Please ensure that
this operation is being performed in
the context of an ASP.NET request.]
System.Web.UI.ScriptManager.get_IPage()
+373832 System.Web.UI.ScriptManager.OnPagePreRenderComplete(Object
sender, EventArgs e) +54
System.Web.UI.Page.OnPreRenderComplete(EventArgs
e) +8698462
System.Web.UI.Page.ProcessRequestMain(Boolean
includeStagesBeforeAsyncPoint, Boolean
includeStagesAfterAsyncPoint) +1029
Blockquote
What's wrong? How should I do it properly?

Okay, i've written something like this:
<%# Page Title="" Language="C#" MasterPageFile="~/MasterPage.Master" AutoEventWireup="true"
CodeBehind="newsEditor.aspx.cs" Inherits="ExpertSiteV2.newsEditor" %>
<%# Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="asp" %>
<%# Register Assembly="ExpertSiteV2" Namespace="ExpertSiteV2" TagPrefix="custom" %>
<asp:Content ID="Content3" ContentPlaceHolderID="Main" runat="server">
<asp:Panel ID="Panel4" runat="server">
<asp:Panel ID="Panel1" runat="server">
<asp:Panel ID="Panel2" runat="server" Width="660" Style="margin-bottom: 10px;">
<asp:Label ID="Label1" runat="server" Text="Label" Width="150">Заголовок новости</asp:Label>
<asp:TextBox ID="newsTitle" runat="server" Width="500" Style="float: right;"></asp:TextBox>
</asp:Panel>
<custom:CustomEditor ID="Editor3" runat="server" Height="300" Width="660" BackColor="White" />
<asp:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server">
</asp:ToolkitScriptManager>
<asp:Panel ID="Panel3" runat="server" Style="margin-top: 5px;" CssClass="buttonPanel">
<asp:ImageButton ID="SaveImageButton1" runat="server" ImageUrl="img/save_32.png"
ToolTip="Сохранить новость" />
<asp:LinkButton ID="SaveLinkButton1" runat="server" ToolTip="Сохранить новость">Сохранить</asp:LinkButton>
<asp:ImageButton ID="ImageButton2" runat="server" CausesValidation="False" ImageUrl="img/block_32.png"
PostBackUrl="news.aspx" ToolTip="Вернуться к странице новостей" />
<asp:LinkButton ID="LinkButton2" runat="server" ToolTip="Вернуться к странице новостей"
CausesValidation="False" PostBackUrl="news.aspx">Отмена</asp:LinkButton>
</asp:Panel>
<asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ErrorMessage="Заголовок должен быть заполнен!"
ControlToValidate="newsTitle" Display="Dynamic">
</asp:RequiredFieldValidator>
</asp:Panel>
</asp:Panel>
</asp:Content>
Here is one more panel that contains everything. And I've written:
Panel4.Controls.Clear();
It works fine.
I still don't know why the Panel1 doesn't want to remove child controls. If someone knows just write the answer.

Can't you not just hide the panel? Panel1.Visible = false. why do you wanna remove the controls.
Aha ok I get the question now:
Check out this project, http://www.codeproject.com/KB/user-controls/DynamicUC.aspx

How to debug SITE.MASTER ASPX file?

I am developing a C#/SQL VS 2008 website application and I'm trying to set breakpoints in my site.master file--is there a way to do this? The contents of this file are:
<%# Master Language="C#" AutoEventWireup="true" CodeFile="Site.master.cs" Inherits="Site" %>
<!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 id="Head1" runat="server">
<title>Forms Authentication, Authorization, and User Accounts</title>
<link href="Styles.css" rel="stylesheet" type="text/css" />
</head>
<body>
<div id="wrapper">
<form id="form1" runat="server">
<div id="header">
<span class="title">User Account Tutorials</span><br />
<span class="breadcrumb">
<asp:SiteMapPath ID="SiteMapPath1" runat="server">
</asp:SiteMapPath>
</span>
</div>
<div id="content">
<asp:ContentPlaceHolder ID="MainContent" runat="server">
<!-- Page-specific content will go here... -->
</asp:ContentPlaceHolder>
</div>
<div id="navigation">
<asp:ContentPlaceHolder ID="LoginContent" runat="server">
<asp:LoginView ID="LoginView1" runat="server">
<LoggedInTemplate>
Welcome back,<asp:LoginName ID="LoginName1" runat="server" />
</LoggedInTemplate>
<AnonymousTemplate>
Hello, stranger!
</AnonymousTemplate>
</asp:LoginView>
<br />
<br />
</asp:ContentPlaceHolder>
<asp:LoginStatus ID="LoginStatus1" runat="server" LogoutAction="Redirect" LogoutPageUrl="~/Logout.aspx" />
<ul>
<li>
<asp:HyperLink runat="server" ID="lnkHome" NavigateUrl="~/Default.aspx">Home</asp:HyperLink>
</li>
<asp:Repeater runat="server" ID="menu" DataSourceID="SiteMapDataSource1">
<ItemTemplate>
<li>
<asp:HyperLink ID="lnkMenuItem" runat="server" NavigateUrl='<%# Eval("Url") %>'><%# Eval("Title") %></asp:HyperLink>
<asp:Repeater ID="submenu" runat="server" DataSource="<%# ((SiteMapNode) Container.DataItem).ChildNodes %>">
<HeaderTemplate>
<ul>
</HeaderTemplate>
<ItemTemplate>
<li>
<asp:HyperLink ID="lnkMenuItem" runat="server" NavigateUrl='<%# Eval("Url") %>'><%# Eval("Title") %></asp:HyperLink>
</li>
</ItemTemplate>
<FooterTemplate>
</ul>
</FooterTemplate>
</asp:Repeater>
</li>
</ItemTemplate>
</asp:Repeater>
</ul>
<asp:SiteMapDataSource ID="SiteMapDataSource1" runat="server" ShowStartingNode="false" />
</div>
</form>
</div>
</body>
</html>
My site.master.cs file contents:
public partial class Site : System.Web.UI.MasterPage
{
protected void Page_Load(object sender, EventArgs e)
{
}
}

You can set breakpoints in the code-behind, and javascript debugging will be as good (or bad) as always. The master page is just another aspx page; nothing differs.

You should put the breakpoint in your code behind. i.e. PageLoad.
So in your case the code behind file is: Site.master.cs
The code behind of my masterpages are mostly empty (like you have). Its main purpose is to define your website's structure and it contains the place holders for you "real content".
Scenarios where you might want to put some logic in your Master page's code-behind is for instance when you want to generate a Google-maps javascript (coming from the database) at the bottom of every page of your website.

You can put breakpoint at the first '{' of the PageLoad method.