綁定WPF不立即執行

Question

我想更新函數開始處的忙指示符。 僅當功能完成時才執行綁定。

private async void DoJob() 
{ 
    await Task.Run(() => SetBusyIndicatorState(true)); 

    var res = await (LongFunction()); 
    ... 

    await Task.Run(() => SetBusyIndicatorState(false)); 
} 

private void SetBusyIndicatorState(bool state) 
{ 
    Application.Current.Dispatcher.BeginInvoke(new Action(() => 
     { 
      RadBusyIndicatorLoad.IsBusy = state; 
     })); 
} 

Answer 1

將您的方法標記爲異步並等待執行完成。

 SetBusyIndicatorState(true); 

    Task.Run(() => 
    { 
     //implement 
    }).ContinueWith(completedtaskresult=> 
    { 
     SetBusyIndicatorState(false) 
    }, TaskScheduler.FromCurrentSynchronizationContext());