委託方法防止重複刷新

    public delegate void PatientChangedDelegate();


    public partial class FrmPatientList : UserControl
    {
        public static PatientChangedDelegate PatientChanged;

        /// <summary>
        /// 點擊觸發
        /// </summary>
        private void gridControl1_MouseClick(object sender, MouseEventArgs e)
        {

             if (PatientChanged != null)
                 PatientChanged();//調用事件
        }

        /// <summary>
        /// 判斷是否添加相同名稱的委託方法
        /// </summary>
        /// <param name="strMethodName">委託方法名稱</param>
        /// <returns>true已有；false 無；</returns>
        public static bool JudgeIsAddPatChanged(string strMethodName)
        {
            if (PatientChanged == null)
                return false;

            Delegate[] delegates = PatientChanged.GetInvocationList();
            foreach (var item in delegates)
            {
                if (item.Method.Name == strMethodName)
                {
                    return true;
                }
            }

            return false;
        }
        
    }

    public partial class FrmWestPrescription : UserControl
    {

        public FrmWestPrescription()
        {
            InitializeComponent();

            this.Disposed += FrmWestPrescription_Disposed;
            //防止多次添加
            if (!FrmPatientList.JudgeIsAddPatChanged("PatientChanged_West"))
                FrmPatientList.PatientChanged += PatientChanged_West;
        }

        /// <summary>
        /// 關閉窗口，資源釋放時觸發
        /// </summary>
        private void FrmWestPrescription_Disposed(object sender, EventArgs e)
        {
            FrmPatientList.PatientChanged -= PatientChanged_West;
        }

        /// <summary>
        /// 切換選中項事件
        /// 重新加載頁面數據、顯示隱藏內容設置
        /// </summary>
        private void PatientChanged_West()
        {
            RefreshPrescription();//刷新數據
        }


    }

        /// <summary>
        /// 關閉對應選項卡
        /// </summary>
        private void xtraTabControl1_CloseButtonClick(object sender, EventArgs e)
        {
            XtraTabPage page = (XtraTabPage)((DevExpress.XtraTab.ViewInfo.PageEventArgs)e).Page;
            page.Dispose();
        }