private void btnEdit_Click(object sender, EventArgs e)
        {
            try
            {
                if (ValidateData() == true)
                {
                    Allowances aAllowances = new Allowances();
                    aAllowances.ID = ID_Old;
                    aAllowances.SalaryPlus = Convert.ToDecimal(txtSalaryPlus.EditValue);
                    aAllowances.CreatedDate = dtpCreateDate.DateTime;
                    aAllowances.ContractType = Convert.ToInt32(lueContractType.EditValue);
                    //tqtrung
                    aAllowances.Type =Convert.ToInt32(cbbType.Text);
                    //end
                    aAllowances.Disable = bool.Parse(cbbDisable.Text);
                    aAllowances.Status = int.Parse(cbbStatus.Text);
                    aAllowancesBO.Update(aAllowances);
                    if (this.afrmLst_Allowances_Old != null)
                    {
                        this.afrmLst_Allowances_Old.Reload();
                    }

                    MessageBox.Show("Sửa thành công !", "Success ", MessageBoxButtons.OK, MessageBoxIcon.Information);
                    this.Close();
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show("frmUpd_Allowances.btnEdit \n" + ex.ToString(), "Error ", MessageBoxButtons.OK, MessageBoxIcon.Error);

            }
        }
 //Author : LinhTing
 //Function : Insert Allowances
 public int Insert(Allowances aAllowances)
 {
     try
     {
         aDatabaseDA.Allowances.Add(aAllowances);
         return  aDatabaseDA.SaveChanges();
     }
     catch (Exception ex)
     {
         throw new Exception(string.Format("AllowancesBO.Insert :"+ ex.Message.ToString()));
     }
 }