// gvmain voucher code
private void loadDataGVMainVoucher(int id)
{
var data = MBLL.LoadMainVocher(id);
GVMainVoucher.DataSource = data;
GVMainVoucher.DataBind();
}
private void clearCntrol_mainVoucher()
{
this.ViewState["CurrentData"] = null;
DataTable dt = new DataTable();
GVMainVoucher.DataSource = dt;
GVMainVoucher.DataBind();
txtMainVoucherNo.Text = "";
txtMainVoucherName.Text = "";
loadDataGVMainVoucher(0);
btnSave.Text = "Save";
}