Hi,
Try printing it with javascript like,
<asp:button id="btnPrint" runat="server" text="Print" onclientclick="javascript:window.print();" xmlns:asp="#unknown" />
This will print the window.
If you want to print data in a div ,pass the div id to a function like,strid.
Then the following code prints the content in div.
var prtContent = document.getElementById(strid);
var WinPrint = window.open('', '', 'letf=0,top=0,width=1000,height=600,toolbar=0,scrollbars=0,status=0');
WinPrint.document.write(prtContent.innerHTML);
WinPrint.document.close();
WinPrint.focus();
WinPrint.print();
WinPrint.close();
Hope this helps.