private void LoadTonBoDuLieu()
{
// add footer
GridColumn column = grvrootmuahang.Columns["Thành Tiền"];
column.SummaryItem.SummaryType = SummaryItemType.Sum;
column.SummaryItem.DisplayFormat = "{0}";
column = grvrootmuahang.Columns["Số Lượng"];
column.SummaryItem.SummaryType = SummaryItemType.Sum;
column.SummaryItem.DisplayFormat = "{0}";
int tag = int.Parse(this.Tag.ToString());
var roleform = GlobalVar.distRoleForm[tag];
btntaomoi.Enabled = roleform.Them;
btnin.Enabled = roleform.In_DL;
btnluuvathem.Enabled = roleform.Sua;
// load data
loadata();
LoaddataTenNCC();
LoadKhoHang();
muaHangBUS.XoaChiTietPhieuNhapHangAO();
grvctmuahang.DataSource = muaHangBUS.LayThongTinHoaDonAo();
//comboxedit grid control
LayThongTinHangHoaTruyenVoCombox();
// format ngay
cbngay.Properties.NullText = DateTime.Today.ToString();
cbngay.Properties.Mask.MaskType = DevExpress.XtraEditors.Mask.MaskType.DateTime;
cbngay.Properties.Mask.EditMask = "dd/MM/yyyy";
cbngay.Properties.Mask.UseMaskAsDisplayFormat = true;
txthanthanhtoan.Properties.NullText = DateTime.Today.ToString();
txthanthanhtoan.Properties.Mask.MaskType = DevExpress.XtraEditors.Mask.MaskType.DateTime;
txthanthanhtoan.Properties.Mask.EditMask = "dd/MM/yyyy";
txthanthanhtoan.Properties.Mask.UseMaskAsDisplayFormat = true;
}