print contents of a grid view with users defind header n footer

check this

http://www.aspsnippets.com/Articles/Print-functionality-in-ASP.Net-GridView-control.aspx

And let me know if it works for you

i got this exception

htmlexception was unhandled by usercode

Control 'GridView1' of type 'GridView' must be placed inside a form tag with runat=server

Refer here

http://www.aspsnippets.com/Articles/Exception---Control-GridView1-of-type-GridView-must-be-placed-inside-a-form-tag-with-runatserver.aspx

now i got this

Microsoft JScript runtime error: Unable to get value of the property 'document': object is null or undefined

Rebind the GridView with data in the print event