I call a javascript function for print but doesn't work

Question

I use below code for print from Page but doesn't work (means when i click on print button nothing happen). the function doesn't call

 <script type="text/javascript">
        function printing() {
            window.print();
        }
    </script>

protected void print_Click(object sender, EventArgs e)
{
    btnPrint.Attributes.Add("onclick", "return printing()");
}

Answer 1

Try this way:

<asp:Button ID="print" runat="server" Text="Print" OnClientClick="javascript:window.print();" />