private void frmTimPhieuNhap_Load(object sender, EventArgs e)
{
dtpNgayLap.Value = DateTime.Today;
cbNhaCungCap.DataSource = bus_Ncc.TaoBang("");
cbNhaCungCap.DisplayMember = "TenNhaCC";
cbNhaCungCap.ValueMember = "IDNhaCC";
}
void hienthi(string dieukien)
{
grvDSNCC.DataSource = bus.TaoBang(dieukien);
}