在异步事件中, 可以通过 TIWAJAXNotifier 发出一个通知(通过其 Notify 方法), 该通知会激发其 OnNotify 事件.

这一般用在: 当一个异步事件完成后, 立即处理随后的事情.

---

TIWAJAXNotifier 所在单元及继承链:

IWCompExtCtrls.TIWAJAXNotifier < TIWBaseHTML40Component < TIWBaseHTMLComponent < TIWBaseComponent < TComponent < TPersistent < TObject

主要成员:

---

property SendNotification: Booleanproperty OnNotify: TNotifyEventprocedure Notify

---

测试(需要 1 个 IWButton、4 个 IWLabel、3 个 IWAJAXNotifier):

---

{确保这是异步事件}procedure TIWForm1.IWButton1AsyncClick(Sender: TObject; EventParams: TStringList);begin  IWLabel1.Caption := TimeToStr(Time);  IWAJAXNotifier1.Notify; //OnAsyncClick 执行到最后, 让 IWAJAXNotifier1 发出通知end;{IWAJAXNotifier1.OnNotify}procedure TIWForm1.IWAJAXNotifier1Notify(Sender: TObject);begin  Sleep(1000);  IWLabel2.Caption := TimeToStr(Time);  IWAJAXNotifier2.Notify; //继续让 IWAJAXNotifier2 发出通知end;{IWAJAXNotifier2.OnNotify}procedure TIWForm1.IWAJAXNotifier2Notify(Sender: TObject);begin  Sleep(1000);  IWLabel3.Caption := TimeToStr(Time);  IWAJAXNotifier3.Notify; //继续让 IWAJAXNotifier3 发出通知end;{IWAJAXNotifier3.OnNotify}procedure TIWForm1.IWAJAXNotifier3Notify(Sender: TObject);begin  Sleep(1000);  IWLabel4.Caption := TimeToStr(Time);end;

---