C# - ASP.NET Button click event not working

Question

I have an ASP.NET (C#) page with some 3rd party controls, some ajaxy stuff and some normal ASP.NET Button controls.

The Button click events do not fire when clicked.

Double-clicking the button in design mode in VS 2008 switches to the code-behind but doesn't create the event handler.

Creating the event handler manually doesn't help.

The whole page is too big to include here, but this is the top bit:

<%@ Page Language="C#" MasterPageFile="~/basewidepage2.master" AutoEventWireup="true" EnableEventValidation="false" CodeFile="CompanyCompliance.aspx.cs" Inherits="CompanyCompliancePage" Title="3DSS" %>

<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="cc1" %>
<%@ Register Assembly="obout_Grid_NET" Namespace="Obout.Grid" TagPrefix="cc2" %>
<%@ Register Src="usercontrols/CalendarEx.ascx" TagName="CalendarEx" TagPrefix="uc2" %>
<%@ MasterType VirtualPath="~/basewidepage2.master" %>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceholder1" runat="Server">

    <script type="text/javascript">
         // a bunch of function declarations
    </script>

...and my button declaration on the page:

<asp:Button ID="LicenseCsvButton" runat="server" Text="Export to CSV" OnClick="LicenseCsvButton_Click" />

...and the code-behind:

protected void LicenseCsvButton_Click(object sender, EventArgs e)
{
    // get data
    CompanyCompliance cc = new CompanyCompliance(Master.theCompany.ID);
    DataTable dt = cc.BusinessLicenses.Tables[0];

    // send to browser as download
    Tools.SendTableAsCsvToBrowser(Response, dt, "LicenseData");
}

Any ideas? could it be the ajax or something? Maybe the 3rd party "obout" grid control?

Update:
I did fix this a month or two ago, so I came back to this question to answer it for posterity but couldn't remember exactly how I fixed it! (Curse you, old age!) I had some limited success by replacing some of the ASP.NET AJAX controls with jQuery UI ones but I think the real solution was that one of the properties in the one of the tags was pointing to a control that no longer existed.

If you're in this same situation, try that and let me know what works in the comments and I'll post the correct answer.

Answer 1

During debugging, check the CausesValidation property of your button. For some reason, one of my pages had a button defaulting to "True." When I explicitly set it to "False" everything worked.