WPF Dispatcher.BeginInvoke和UI /背景线程 [英] WPF Dispatcher.BeginInvoke and UI/Background Threads

问题描述

我认为我需要对WPF Dispatcher.Invoke 和 Dispatcher.BeginInvoke 的用法进行一些说明。

I think I need some clarifications regarding WPFs Dispatcher.Invoke and Dispatcher.BeginInvoke usage.

假设我有一些长期运行的工作代码，例如在简单的WPF应用程序中按一下按钮即可调用的代码：

Suppose I have some long running 'work' code like such that is invoked on the press of a button in a simple WPF application:

longWorkTextBox.Text = "Ready For Work!";
Action workAction = delegate
    {
    Console.WriteLine("Starting Work Action");
    int i = int.MaxValue;
    while (i > 0)
        i--;
    Console.WriteLine("Ending Work Action");
    longWorkTextBox.Text = "Work Complete";
    };
longWorkTextBox.Dispatcher.BeginInvoke(DispatcherPriority.Background, workAction);

此代码在执行 workAction 时锁定了我的用户界面。这是因为Dispatcher调用总是在UI线程上运行，对吧？

This code is locking up my user interface while the workAction is being performed. This is because Dispatcher invokes always run on the UI thread, right?

假设这样做，配置我的调度程序以执行的最佳实践是什么我是否可以在与UI分开的线程中使用workAction ？？我知道可以在 workAction 中添加 BackgroundWorker 来防止UI锁定：

Assuming this, what is the best practice for configuring my dispatcher to execute the workAction in a separate thread from my UI? I know I can add a BackgroundWorker to my workAction to prevent my UI from locking as such:

longWorkTextBox.Text = "Ready For Work!";
Action workAction = delegate
{
    BackgroundWorker worker = new BackgroundWorker();
    worker.DoWork += delegate
    {
        Console.WriteLine("Starting Slow Work");
        int i = int.MaxValue;
        while (i > 0)
        i--;
        Console.WriteLine("Ending Work Action");
    };
    worker.RunWorkerCompleted += delegate
    {
        longWorkTextBox.Text = "Work Complete";
    };
    worker.RunWorkerAsync();
 };
 longWorkTextBox.Dispatcher.BeginInvoke(DispatcherPriority.Background, workAction);

除了使用 BackgroundWorker 之外，还有其他更优雅的方法吗？我一直听说 BackgroundWorker 很古怪，所以我很想知道一些替代方法。

Is there any more elegant ways of doing this besides using the BackgroundWorker? I've always heard that the BackgroundWorker is quirky, so I am curious to know of some alternatives.

推荐答案

老实说，我认为 BackgroundWorker 是最优雅的解决方案。我想不出更简单的方法。

I honestly think the BackgroundWorker is the most elegant solution for this. I cannot think of a simpler way to do it.

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