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Disable Button in AJAX Panel

I have the following button that I would like to disable when it is clicked:

<asp:UpdatePanel id="uPnlC_Step42_UploadRules" runat="server">
<contenttemplate>
    <asp:Button ID="btn_Step42_UploadRules" runat="server" Text="Upload" onclick="btn_Step42_UploadRules_Click" />
</contenttemplate>
<triggers>
        <asp:PostBackTrigger ControlID="btn_Step42_UploadRules" />                
</triggers>
</asp:UpdatePanel>

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I'm able to disable all other buttons in AJAX panels with the below script. However, for the button in the code above, it doesn't work (I assume because of the use of the trigger?) This button controls a fileupload control which is why I require a postback. This is the code I use to disable other AJAX buttons (works for all buttons except the one shown above):

<script language="javascript" type="text/javascript">
    var Page;
    var postBackElement;
    function pageLoad() {
        Page = Sys.WebForms.PageRequestManager.getInstance();
        Page.add_beginRequest(OnBeginRequest);
        Page.add_endRequest(endRequest);
    }

    function OnBeginRequest(sender, args) {
        postBackElement = args.get_postBackElement();
        postBackElement.disabled = true;
    }

    function endRequest(sender, args) {
        postBackElement.disabled = false;
    }  
</script>

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Any idea how to make my button disable immediately when clicked?

thaytu888888

- <asp:PostBackTrigger ControlID="btn_Step42_UploadRules" /> this make the Upload button cause a full post back to the server, so the script pageLoad() which call OnBeginRequest and endRequest will never fired. You just need to add a small javascript to disable Upload button when clicked.

<asp:Button ID="btn_Step42_UploadRules" runat="server" Text="Upload" onclick="btn_Step42_UploadRules_Click" OnClientClick="disableButton(this);" />

//Javascripts
function disableButton(btn)
    {
        if(btn)
        {
            btn.disabled = true;
        }
    }

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Carleton_H

ASKER

I played around with your solution. It works great at disabling the button, but unfortunately, the onclick="btn_Step42_UploadRules_Click" isn't getting fired when I have the OnClientClick="disableButton(this);" in there as well. Any ideas?

Carleton_H

ASKER

Is it possible to execute the btn_Step42_UploadRules_Click code-behind from the Javascript function you supplied?

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thaytu888888

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Carleton_H

ASKER

Thanks, worked like a charm!