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我正在寫一個運行任務並根據this通知的類。當Task.Status更改爲運行時,是否有任何通知?
我想不出一個解決方案的一個問題是如何在Task.Status從TaskStatus.WaitingForActivation
變爲TaskStatus.Running
時通知。
縮短下面的代碼:
using System.ComponentModel;
using System.Runtime.CompilerServices;
using System.Threading.Tasks;
public abstract class ExecutionTracker : INotifyPropertyChanged
{
protected ExecutionTracker(Task task)
{
Task = task;
AwaitTask(task);
}
public event PropertyChangedEventHandler PropertyChanged;
public Task Task { get; }
public TaskStatus Status => Task.Status;
protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)
{
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
}
private async void AwaitTask(Task task)
{
try
{
// This is where status goes from WaitingForActivation to Running
// and I want to do OnPropertyChanged(nameof(Status)) when it happens.
// A hack would be setting a flag awaiting = true here and return TaskStatus.Running if the flag is true.
//^feels nasty
await task.ConfigureAwait(false);
}
// ReSharper disable once EmptyGeneralCatchClause We don't want to propagate errors here. Just make them bindable.
catch
{
}
// Signal propertychanges depending on result
}
}