ASP.NET asynchronous post-back on asp:button click

Question

I am using AJAX in asp:net and am trying to handle a situation where an asp:button triggers both a javascript method and a codebehind c# method. To do this I am using onclic

Answer 1

If you simply want to run your OnClientClick (client) code before your OnClick (server) code, try the following:

ASP.NET

<asp:Button ID="btn_mybutton" runat="server" Text="MyButton" OnClientClick="return JSFunction();" OnClick="CFunction"/>

Javascript

<script type="text/javascript">
    function JSFunction() {
        alert('Some JavaScript stuff');
        return true; 
    }
</script>

C#

protected void CFunction(object sender, EventArgs e)
{
    // Some server code
}

The JavaScript function is executed first and returned from before the server code is executed.