private bool kiem_tra_thang_da_giam_tru_chua(decimal ip_dc_nam)
{
DS_GD_THANG_DA_GIAM_TRU v_ds = new DS_GD_THANG_DA_GIAM_TRU();
US_GD_THANG_DA_GIAM_TRU v_us = new US_GD_THANG_DA_GIAM_TRU();
decimal op_dc_thang_da_giam_tru = 0; //1. da giam tru, 0. chua giam tru
v_us.kiem_tra_thang_da_giam_tru_chua(CIPConvert.ToDecimal(m_txt_chon_thang.Text.Trim()), ip_dc_nam, ref op_dc_thang_da_giam_tru);
if (op_dc_thang_da_giam_tru == 1)
{
return true;
}
else
{
return false;
}
}