Question

我早就创建了我自己的全球合作框架服务,我通过我的银星客户成功地与它交谈。然而,我却陷入了令人感兴趣的问题。当我援引“回话”时,我可以更新任何“情报和安全局”的管制,其范围为穿透的。

这里,我的反馈职能就象

    private void GetTimeCallBack( object sender, Talk.ClientBase<IService>.ClientEventArgs e )
    {
        lblDisplay.Text = e.Object.ToString();
    }

快速通道搜索显示,我不得不这样做。

private void GetTimeCallBack( object sender, Talk.ClientBase<IService>.ClientEventArgs e )
    {
        Dispatcher.BeginInvoke( () => lblDisplay.Text = e.Object.ToString() );
    }

现在,所有事情都不起作用,但我 was切期望我的呼吁能够走到不同的路上。我是否总是要利用派遣国的班子来改变我的班子中的任何内容,或者这只是仅限于调查单位的内容? 我根本不熟悉派遣人员班子,希望能更多地理解。

Answer 1

是的。查询link,用于更多的信息。我在以下问题上补充了Joel的答复:

In Silverlight 2 Beta 2 there was a significant change in the concurrency model used for asynchronous communications. In Beta 1 these type of requests returned on the UI thread. In Beta 2, when you choose to use the BeginGetResponse of the WebRequest you are telling Silverlight to use a worker thread that comes from a thread pool. As a result, you can NOT update any user interface elements on the UI thread. Using Dispatcher.BeginInvoke is a way to get a method to fire back on the UIThread from this threadpool thead. Any interaction with UIelements from the Async callback will throw a cross thread exception.

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