UWP - 调试器附加到.exe但未配置

Question

我正在开发Windows应用商店应用(UWP),我有本机代码的问题 - 我有这个消息.

此代码在第二次或第三次触发后抛出此异常.

if(ProjectionManager.ProjectionDisplayAvailable)
{
    if(init != null)
    {
        init.ProjectionViewPageControl.StartViewInUse();
        await ProjectionManager.StopProjectingAsync(MainPage.SecondaryViewId, thisViewId);
        init.ProjectionViewPageControl.StopViewInUse();
        rootPage.ProjectionViewPageControl = null;
    }

    if(rootPage.ProjectionViewPageControl == null)
    {
        //First, create a new, blank view
        var thisDispatcher = Window.Current.Dispatcher;
        await CoreApplication.CreateNewView().Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
        {
            rootPage.ProjectionViewPageControl = ViewLifetimeControl.CreateForCurrentView();                //ViewLifetimeControl is a wrapper to make sure the view is closed only when the app is done with it

            //Assemble some data necessary for the new page
            init = new ProjectionViewPageInitializationData();
            init.MainDispatcher = thisDispatcher;
            init.ProjectionViewPageControl = rootPage.ProjectionViewPageControl;
            init.MainViewId = thisViewId;
                                            //Note that the view will not become visible until "StartProjectingAsync" is called
            var rootFrame = new Frame();
            rootFrame.Navigate(typeof(ProjectionViewPage), init);
            Window.Current.Content = rootFrame;
            Window.Current.Activate();
        });
    }

    try
    {
        rootPage.ProjectionViewPageControl.StartViewInUse();    // Start/StopViewInUse are used to signal that the app is interacting with the view, so it shouldn't be closed yet, even if the user loses access to it
        await ProjectionManager.StartProjectingAsync(rootPage.ProjectionViewPageControl.Id, thisViewId);    // Show the view on a second display (if available) or on the primary display
        rootPage.ProjectionViewPageControl.StopViewInUse();
    }
    catch { }
}

ProjectionViewPage打开,一切正常但我不知道出了什么问题.在不同时间页面打开和关闭后,抛出此异常.我不知道出了什么问题.

UPD 问题发生在ProjectionViewPage有MediaElement控制权时.

Answer 1

您需要将调试器类型从Managed Only(默认)更改为Mixed.它不会修复你的异常,但至少你可以用调试器跟踪它:)