ASP.NET: OnServerClick event handler not called if using onclick

Question

I have a peculiar problem here and I can\'t by my life figure out what the solution is. Note that the following code is not dynamically created, but just immediatel

Answer 1

The accepted answer is not perfect. If you do not use type="button", the web page will do postback even you have clicked cancel. The correct and easiest way is to take advantage of short-circuit evaluation and do this hack: replace ; with && !, like below.

<button runat="server" id="btnSubmit"
        OnServerClick="btnSubmit_Click" onclick="return confirm('Sure?') && !">

The output will look like this:

<button id="btnSubmit"
        onclick="return confirm('Sure?') && ! __doPostBack('btnSubmit','')">

It gives correct return value because true && !undefined will return true and undefined will be evaluated and false && !undefined will return false and undefined will NOT be evaluated which is exactly what we want.

Answer 2

Front Site

  <button  id="submit1" runat="server"  
              onclick="if(confirm('Sure?')) { } else{ return false} ;"    
              onserverclick="submit_ServerClick"  >save</button>

Back Site

protected void submit_ServerClick(object sender, EventArgs e)
{
}