How to print gridview page in C#?

<pre>function lnkPrint() {
            var printContent = document.getElementById('<%=GridView1.ClientID %>');
            var printWindow = window.open("All Records", 
            "Print Panel", 'left=50000,top=50000,width=0,height=0');
            printWindow.document.write(printContent.innerHTML);
            printWindow.document.close();
            printWindow.focus();
            printWindow.print();
        }