Prevent multiple postbacks in SharePoint 2013

The scenario:  Disabled the button after user’s click event. Prevent user from clicking it several times.

The problem: If the button is disabled, the server side event handler is not fired.

The solution: Set the property UseSubmitBehavior to false.

Explanations: 

Here is the working code of how to have disabled button after it is clicked:

<asp:Button ID="Button1" runat="server" Text="Do Postback" UseSubmitBehavior="false"  OnClick="Button1_Click" OnClientClick="Validate(this)"  />

       function Validate(thisObj)

       {

           thisObj.disabled = true;

           return true;

       }

If you don't set the property UseSubmitBehavior your code in the handler Button1_Click won’t fire. I spend several hours in debugging it. Hope this save time to somebody.