WPF窗口没有关闭

Question

你可以告诉初学者为什么这个小的WPF应用程序在WorkflowTerminated事件触发后没有按预期关闭？使用的工作流程立即终止.(使用WPF应用程序,.Net Framework 3.5)

public partial class MainWindow : Window
{
    private WorkflowRuntime wfRuntime = new WorkflowRuntime();

    public MainWindow()
    {
        InitializeComponent();

        wfRuntime.WorkflowTerminated += (se, ev) => this.Close(); // this doesn't close the window
        wfRuntime.WorkflowCompleted += (se, ev) => this.Close();
    }

    private void Window_Loaded(object sender, RoutedEventArgs e)
    {
        WorkflowInstance launcherWorkflow = wfRuntime.CreateWorkflow(typeof(InstallerWorkflow));

        launcherWorkflow.Start();
    }
}

Answer 1

可能是因为回调是在另一个线程上.一个基本的解决方法是使用完全终止应用程序Environment.Exit(1);

要在UI线程上调用close函数,您应该使用:

wfRuntime.WorkflowTerminated += (se, ev) => {
    // call back to the window to do the UI-manipulation
    this.Dispatcher.Invoke(DispatcherPriority.Normal, new Action(delegate() 
    {
       this.Close();
    }));
};