i did it but there is some problem in hyperlink button that i use in my grid view to show data
<asp:HyperLink ID="HyperLink1" runat="server"
NavigateUrl='<%# Eval("id","customer.aspx?behcode={0}") %>'
Text='<%# Eval("name") %>'></asp:HyperLink>
Error:DataBinding: 'System.Data.Common.DataRecordInternal' does not contain a property with the name 'id'.
when i use my last code
SqlCommand _cm2 = new SqlCommand(" select * from furniture_ch where F_code ="+Request.QueryString["Code"], _cn);
there wasnt any problem and shows data.