Print an Cert_print.aspx page from a search.aspx page print button clicked. This button will print the cert_print.aspx page during the page of this page

Hi,

     I have a search listing page. This page result display in a grid. From the records displayed in a grid my user will select more records using checkbox. When the user click on the print button, I pass the ID to a Page called Cert_Print.aspx where I format my to display the required information.

Actually when click on the Print button its calling another page Cert_print.aspx. During the page load of Cert_Print.aspx I have to print this page.
Could anyone help me how to do that in ASP.NET, C# in page load event.