private void btnLuu_Click(object sender, EventArgs e)
        {
            SimpleButton btn = (SimpleButton)sender;

            if (btn.Equals(btnThem))
            {
                Clear_Text();
                sTypeAction = TypeAction.Insert;
                enable_control(sTypeAction);
            }
            else if (btn.Equals(btnXoa))
            {
                if (XtraMessageBox.Show("Bạn có chắc muốn xóa?", "Thông báo", MessageBoxButtons.YesNo, MessageBoxIcon.Warning) == DialogResult.Yes)
                {
                    if (DeleteAction())
                    {
                        sTypeAction = TypeAction.None;
                    }
                    enable_control(sTypeAction);
                }
            }
            else if (btn.Equals(btnSua))
            {
                sTypeAction = TypeAction.Update;
                enable_control(sTypeAction);
            }
            else if (btn.Equals(btnDong))
            {
                Close();
            }
            else if (btn.Equals(btnLuu))
            {
                bool result = true;
                switch (sTypeAction)
                {
                case TypeAction.Insert:
                    if (SaveAction())
                    {
                        result = true;
                    }
                    else
                    {
                        result = false;
                    }
                    break;

                case TypeAction.Delete:
                    if (DeleteAction())
                    {
                        result = true;
                    }
                    else
                    {
                        result = false;
                    }
                    break;

                case TypeAction.Update:
                    if (UpdateAction())
                    {
                        result = true;
                    }
                    else
                    {
                        result = false;
                    }
                    break;
                }
                if (result)
                {
                    sTypeAction = TypeAction.None;
                    enable_control(sTypeAction);
                }
            }
            else if (btn.Equals(btnHuyBo))
            {
                sTypeAction = TypeAction.None;
                enable_control(sTypeAction);
                OnloadData();
                fncLoadDetail((ArticleEntity)gvArticle.GetFocusedRow());
            }
        }