Binding data from aspx page to crystal report

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ASP.NET

hii.. how do we bind data from aspx page to crystal report with a button click. usually for grid we use
after writing the sqlcommand for searching in a button click we give like this
for retreiving in grid

if (dt.Rows.Count >(greater than) 0)
       {
           GridView1.DataSource = dt;
            GridView1.DataBind();
       }
 for crystal report i will be giving as
  if (dt.Rows.Count >(greater than) 0)
       {
          response.Redirect("crystalreport.aspx") //the page where we can view the crystal report.
       }

what should be the code written in crystalreport aspx page
and in case we are using stored procedure what should be the discreet value of the parameter in crystal report in case 'where' condition is used