private void LoadCBC()
{
var declarations = DBReadManager.GetViewedCbcDeclarations();
Session["declarations"] = declarations;
gvCBC.Bind(declarations);
}
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.GetViewedCbcDeclarations(taxRefNo, year);
gvCBC.Bind(declarations);
}