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我正在学习ASP .NET中的异步操作。我在这里找到一篇文章MSDN。代码有效,但我希望能够在漫长的过程中更新UI。它只显示过程结束后的结果。我在AsyncClass中使用了与上述链接相同的代码。这里是代码:PageAsyncTask更新UI
AsyncTask slowTask1 = new AsyncTask();
PageAsyncTask task = new PageAsyncTask(slowTask1.OnBegin, slowTask1.OnEnd, slowTask1.OnTimeout, "Async1", true);
Page.AsyncTimeout = new TimeSpan(0, 0, 5);
Page.RegisterAsyncTask(task);
// Page.ExecuteRegisteredAsyncTasks();
IAsyncResult result = slowTask1.OnBegin(this.Page,null,null,null);
WaitHandle waitHandle = result.AsyncWaitHandle;
waitHandle.WaitOne(2000, false);
if(result.IsCompleted)
{
slowTask1.OnEnd(result);
lbProgress.Text = slowTask1.GetAsyncTaskProgress();
Thread.Sleep(1000);
}
else
lbProgress.Text = slowTask1.GetAsyncTaskProgress();