private void BtnCancel_Click(object sender, EventArgs e)
        {
            InitControls();

            myMode = BtnMode.NONE; // 모드 초기화

            GrdMemberTbl.Focus();
        }
        private void BtnDelete_Click(object sender, EventArgs e)
        {
            if (myMode != BtnMode.UPDATE)
            {
                MetroMessageBox.Show(this, $"삭제할 데이터를 선택하세요.", "알림");
                return;
            }

            DialogResult choice = MetroMessageBox.Show(this, "삭제하시겠습니까?", "경고", MessageBoxButtons.YesNo, MessageBoxIcon.Warning);

            if (choice == DialogResult.No)
            {
                return;
            }

            myMode = BtnMode.DELETE;
            //DeleteData();
            SaveData();
            InitControls();

            GrdMemberTbl.Focus();
        }