You need datasource for the report.
Look at the example and you may know that how to do it.
rprt.Load(Server.MapPath("~/CrystalReport.rpt"));
SqlConnection con = new SqlConnection(@"Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\Database.mdf;Integrated Security=True;User Instance=True");
SqlCommand cmd = new SqlCommand("sp_select", con);
SqlDataAdapter sda = new SqlDataAdapter(cmd);
DataSet ds = new DataSet();
sda.Fill(ds, "Newtbl_data");
rprt.SetDataSource(ds);
CrystalReportViewer1.ReportSource = rprt;