protected void btnSearch_Click(object sender, EventArgs e) { var taxRefNo = txtTexRefNo.FieldValue != null ? txtTexRefNo.Text : null; var year = !string.IsNullOrEmpty(txtYear.Text) ? Convert.ToInt32(txtYear.Text) : 0; var declarations = DBReadManager.GetNewCbcDeclarations(taxRefNo, year); if (!declarations.HasRows) { MessageBox.Show("No Declarations found for Tax Ref No " + taxRefNo); } gvCBC.Bind(declarations); }