private void button15_Click(object sender, EventArgs e)
        {
            BindDataDauBep();
            SMSRepostitory rep = new SMSRepostitory();
            CHEF_INFO dt = new CHEF_INFO();
            if (FormState == FormBase.FormStateType.New)
            {
                dt.NAME = textBox7.Text.Trim();
                dt.BIRTHDAY = dateTimePicker1.Value;
                dt.ADDRESS = textBox4.Text.Trim();
                dt.PHONE = textBox5.Text.Trim();


                rep.InsertCheft(dt);
            }
            else if (FormState == FormBase.FormStateType.Edit)
            {
                dt.Id = PKEY;
                dt.NAME = textBox7.Text.Trim();
                dt.BIRTHDAY = dateTimePicker1.Value;
                dt.ADDRESS = textBox4.Text.Trim();
                dt.PHONE = textBox5.Text.Trim();
                rep.UpdateChef(dt);
            }
            FormState = FormBase.FormStateType.Normal;
            LoadDataDauBep();
        }