Disable button on submit instead of onclick
Use this code?
Button is not firing postBack because you have disabled this. The approach to avoid multiple postBack is to have two buttons side by side. Real and dummy. On first click hide/delete the real button and show the dummy one
<asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" ClientIDMode="Static" OnClientClick="disableButton();"/> <asp:Button ID="ButtonDummy" runat="server" Text="Button" ClientIDMode="Static" OnClientClick='return false;' style="display:none;"/>
and JS:
function disableButton() {
$("#Button1").hide();
$("#ButtonDummy").show();
return true;
}