private void txtSearchStd_TextChanged(object sender, EventArgs e) { BL.CLS_stduent Std = new BL.CLS_stduent(); DataTable dataTable = new DataTable(); dataTable = Std.SearchStdName(txtSearchStd.Text); //this.crystalReportViewer1.ReportSource= dataTable; this.crystalReportViewer1.RefreshReport(); }