How to print GridView Data With Horizontal,vertical lines in asp.net C#

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ASP.NET

Javascript

C#3.5

Hi Sir - I want to print grid view data with horizontal, vertical lines table format.

I tried to print but I am getting without lines (plain format)

I put my Grid View in div and wrote this code :-

<script type="text/javascript">
        function CallPrint() {
            var printContent = document.getElementById('%=DivReport.ClientID %');
            printContent.border = 1;
            var WinPrint = window.open('PrintGridViewData','left=100,top=100,width=1000,height=1000,tollbar=10,scrollbars=1,status=1,paresizable=1');
WinPrint.document.write(document.getElementById('%=DivReport.ClientID %').innerHTML);
            WinPrint.document.close();
            WinPrint.focus();
            WinPrint.print();
            WinPrint.close();
        }
 </script>

Please help me...