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Javascript Confirm using Server Tags

My goal is to have an ASP.NET checkbox server tag with it's autopostback set
to true, that when clicked will run the checkbox's CheckedChanged event.
However, I would like to try to add a javascript confirm popup to this
checkbox server control to prevent this event from firing if the cancel
button is checked in the js confirm window. In the example below, I am able
to accomplish this using the input type=checkbox but without the autopostback
feature; but, when using the asp:checkbox the cancel button does not prevent
the CheckedChanged event from firing but it does autopostback. I understand
the problem that the onclick attribute is being added in a span tag and the
checkbox's onclick is handling the postback, but not sure how to design
around this and accomplish the desired result....btw, is there a way to turn
off the compiler from autogenerating all the javascript postback code in a

Below is an example:
====.aspx====== =
<%@ Page language="c#" Codebehind="jsC onfirmPopup.asp x.cs"
AutoEventWireup ="false" Inherits="playg round.jsConfirm Popup" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<title>jsConfir mPopup</title>
<meta name="GENERATOR " Content="Micros oft Visual Studio 7.0">
<meta name="CODE_LANG UAGE" Content="C#">
<meta name="vs_defaul tClientScript" content="JavaSc ript">
<meta name="vs_target Schema"
content="http://schemas.microso ft.com/intellisense/ie5">
<script language="JavaS cript">
function okCancelConfirm (msg)
var answer = confirm (msg)
if (answer)
return true; // submit page
return false; // cancel page submission
<body MS_POSITIONING= "GridLayout ">
<form id="jsConfirmPo pup" method="post" runat="server">
<asp:checkbox ID="chkBox1" AutoPostBack="T rue"
Runat="server"> </asp:checkbox>
<input type="checkbox" id="chkBox2" onclick="return okCancelConfirm ('Are
you sure you want to do this?')"></input>

===.cs========= ==
using System;
using System.Collecti ons;
using System.Componen tModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.Sess ionState;
using System.Web.UI;
using System.Web.UI.W ebControls;
using System.Web.UI.H tmlControls;

namespace playground
/// <summary>
/// Summary description for jsConfirmPopup.
/// </summary>
public class jsConfirmPopup : System.Web.UI.P age
protected System.Web.UI.W ebControls.Chec kBox chkBox1;

private void Page_Load(objec t sender, System.EventArg s e)
chkBox1.Attribu tes.Add("onClic k","return okCancelConfirm ('Are you sure
you want to do this?')");


#region Web Form Designer generated code
override protected void OnInit(EventArg s e)
// CODEGEN: This call is required by the ASP.NET Web Form Designer.
InitializeCompo nent();

/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeCompo nent()
this.chkBox1.Ch eckedChanged += new
System.EventHan dler(this.chkBo x1_CheckedChang ed);
this.Load += new System.EventHan dler(this.Page_ Load);


private void chkBox1_Checked Changed(object sender, System.EventArg s e)
Response.Write( "Checked Changed Event Fired");

Nov 18 '05 #1
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