初始化组件抛出异常

Question

例外：

An unhandled exception of type 'System.AccessViolationException' occurred in Notepad.exe

Attempted to read or write protected memory. This is often an indication that other memory is corrupt.

哪里：

我不确定为什么会发生这种情况。我的 XAML：

<Page
    x:Class="Notepad.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:Notepad"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:winui="using:Microsoft.UI.Xaml.Controls"
    mc:Ignorable="d winui"
    Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">

    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="25px"></RowDefinition>
            <RowDefinition Height="25px"></RowDefinition>
            <RowDefinition Height="*"></RowDefinition>
            <RowDefinition Height="25px"></RowDefinition>
        </Grid.RowDefinitions>
        <MenuBar Grid.Row="0" Height="22.5px">
            <MenuBarItem Title="File">
                <MenuFlyoutItem Text="New">
                    <MenuFlyoutItem.KeyboardAccelerators>
                        <KeyboardAccelerator Modifiers="Control" Key="N">

                        </KeyboardAccelerator>
                    </MenuFlyoutItem.KeyboardAccelerators>
                </MenuFlyoutItem>
                <MenuFlyoutItem Text="New Window" Click="New_Window_Click" Loaded="extra.LOADER_LOAD">
                    <MenuFlyoutItem.KeyboardAccelerators>
                        <KeyboardAccelerator Key="N">
                            <KeyboardAccelerator.Modifiers>
                                Control
                                <!-- 5 = Control & Shift -->
                            </KeyboardAccelerator.Modifiers>
                        </KeyboardAccelerator>
                    </MenuFlyoutItem.KeyboardAccelerators>
                </MenuFlyoutItem>
                <MenuFlyoutItem Text="Open...">
                    <MenuFlyoutItem.KeyboardAccelerators>
                        <KeyboardAccelerator Modifiers="Control" Key="O">

                        </KeyboardAccelerator>
                    </MenuFlyoutItem.KeyboardAccelerators>
                </MenuFlyoutItem>
                <MenuFlyoutItem Text="Save">
                    <MenuFlyoutItem.KeyboardAccelerators>
                        <KeyboardAccelerator Modifiers="Control" Key="S">
                            
                        </KeyboardAccelerator>
                    </MenuFlyoutItem.KeyboardAccelerators>
                </MenuFlyoutItem>
                <MenuFlyoutItem Text="Save As..." Loaded="extra.LOADER_LOAD">
                    <MenuFlyoutItem.KeyboardAccelerators>
                        <KeyboardAccelerator Key="S">
                            <KeyboardAccelerator.Modifiers>
                                Control<!-- 5 = Control & Shift -->
                            </KeyboardAccelerator.Modifiers>
                        </KeyboardAccelerator>
                    </MenuFlyoutItem.KeyboardAccelerators>
                </MenuFlyoutItem>
                <MenuFlyoutSeparator></MenuFlyoutSeparator>
                <MenuFlyoutItem Text="Page Setup"></MenuFlyoutItem>
                <MenuFlyoutItem Text="Print...">
                    <MenuFlyoutItem.KeyboardAccelerators>
                        <KeyboardAccelerator Modifiers="Control" Key="P"></KeyboardAccelerator>
                    </MenuFlyoutItem.KeyboardAccelerators>
                </MenuFlyoutItem>
                <MenuFlyoutSeparator></MenuFlyoutSeparator>
                <MenuFlyoutItem Text="Exit" Click="Exit_Click"></MenuFlyoutItem>
            </MenuBarItem>
            <MenuBarItem Title="Edit">
                <MenuFlyoutItem Text="Undo"></MenuFlyoutItem>
                <MenuFlyoutSeparator></MenuFlyoutSeparator>
                <MenuFlyoutItem Text="Cut"></MenuFlyoutItem>
                <MenuFlyoutItem Text="Copy"></MenuFlyoutItem>
                <MenuFlyoutItem Text="Paste"></MenuFlyoutItem>
                <MenuFlyoutItem Text="Delete"></MenuFlyoutItem>
                <MenuFlyoutSeparator></MenuFlyoutSeparator>
                <MenuFlyoutItem Text="Search"></MenuFlyoutItem>
                <MenuFlyoutItem Text="Find..."></MenuFlyoutItem>
                <MenuFlyoutItem Text="Find Next"></MenuFlyoutItem>
                <MenuFlyoutItem Text="Find Previous"></MenuFlyoutItem>
                <MenuFlyoutItem Text="Replace"></MenuFlyoutItem>
                <MenuFlyoutItem Text="Go To..."></MenuFlyoutItem>
                <MenuFlyoutSeparator></MenuFlyoutSeparator>
                <MenuFlyoutItem Text="Select All"></MenuFlyoutItem>
                <MenuFlyoutItem Text="Time/Date"></MenuFlyoutItem>
            </MenuBarItem>
            <MenuBarItem Title="Format">
                <ToggleMenuFlyoutItem Text="Word Wrap"></ToggleMenuFlyoutItem>
                <MenuFlyoutItem Text="Font..."></MenuFlyoutItem>
            </MenuBarItem>
            <MenuBarItem Title="View">
                <MenuFlyoutSubItem Text="Zoom">
                    <MenuFlyoutItem Text="Zoom In"></MenuFlyoutItem>
                    <MenuFlyoutItem Text="Zoom Out"></MenuFlyoutItem>
                    <MenuFlyoutItem Text="Restore Default Zoom"></MenuFlyoutItem>
                </MenuFlyoutSubItem>
                <ToggleMenuFlyoutItem Text="Status Bar"></ToggleMenuFlyoutItem>
            </MenuBarItem>
            <MenuBarItem Title="Help">
                <MenuFlyoutItem Text="View Help"></MenuFlyoutItem>
                <MenuFlyoutItem Text="Send Feedback"></MenuFlyoutItem>
                <MenuFlyoutSeparator></MenuFlyoutSeparator>
                <MenuFlyoutItem Text="About Notepad"></MenuFlyoutItem>
            </MenuBarItem>
        </MenuBar>
        <winui:TabView x:Name="Documents" Grid.Row="1" Loaded="Documents_Loaded" AddTabButtonClick="Documents_AddTabButtonClick" TabCloseRequested="Documents_TabCloseRequested" CanReorderTabs="True" CanDragTabs="True" SelectionChanged="Documents_SelectionChanged"></winui:TabView>
        <TextBox x:Name="WritePanel" Grid.Row="2" BorderThickness="0" AcceptsReturn="True" ScrollViewer.VerticalScrollBarVisibility="Visible"> 
            
        </TextBox>
    </Grid>
</Page>

我的 xaml.cs：

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices.WindowsRuntime;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;
using Windows.UI.Xaml.Data;
using Windows.UI.Xaml.Input;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Navigation;
using System.ComponentModel;
using Windows.UI.Core;
using Windows.UI.ViewManagement;
using Windows.ApplicationModel.Core;
using ViewsHelpers;
using Microsoft.UI.Xaml.Controls;
// The Blank Page item template is documented at https://go.microsoft.com/fwlink/?LinkId=402352&clcid=0x409

namespace Notepad
{
    /// <summary>
    /// An empty page that can be used on its own or navigated to within a Frame.
    /// </summary>
    public sealed partial class MainPage : Page
    {
        public Extra extra = new();

        public MainPage()
        {
            this.InitializeComponent();
        }

        private async void New_Window_Click(object sender, RoutedEventArgs e)
        {
            ViewLifetimeControl viewControl = null;
            await CoreApplication.CreateNewView().Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
            {
                // This object is used to keep track of the views and important
                // details about the contents of those views across threads
                // In your app, you would probably want to track information
                // like the open document or page inside that window
                viewControl = ViewLifetimeControl.CreateForCurrentView();
                const string DEFAULT_TITLE = "";
                viewControl.Title = DEFAULT_TITLE;
                // Increment the ref count because we just created the view and we have a reference to it                
                viewControl.StartViewInUse();

                var frame = new Frame();
                frame.Navigate(typeof(MainPage), viewControl);
                Window.Current.Content = frame;
                // This is a change from 8.1: In order for the view to be displayed later it needs to be activated.
                Window.Current.Activate();
                ApplicationView.GetForCurrentView().Title = viewControl.Title;
            });
            var succeeded = await ApplicationViewSwitcher.TryShowAsStandaloneAsync(viewControl.Id);
            System.Diagnostics.Debug.Assert(succeeded);
        }

        private void Exit_Click(object sender, RoutedEventArgs e)
        {
            Application.Current.Exit();
        }

        private void Documents_Loaded(object sender, RoutedEventArgs e)
        {
            var xsender = sender as TabView;
            var tvi = new TabViewItem();
            tvi.Header = "Unnamed Document";
            xsender.TabItems.Add(tvi);
        }

        private void Documents_AddTabButtonClick(Microsoft.UI.Xaml.Controls.TabView sender, object args)
        {
            var tvi = new TabViewItem();
            tvi.Header = "Unnamed Document";
            sender.TabItems.Add(tvi);
        }

        private void Documents_TabCloseRequested(Microsoft.UI.Xaml.Controls.TabView sender, Microsoft.UI.Xaml.Controls.TabViewTabCloseRequestedEventArgs args)
        {
            sender.TabItems.Remove(args.Tab);
        }

        private void Documents_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            var strheader = (e.RemovedItems[0] as TabViewItem)?.Header;
            if(strheader != null) strheader = WritePanel.Text;
            var nextstrheader = (e.AddedItems[0] as TabViewItem)?.Header;
            if (nextstrheader != null) WritePanel.Text = nextstrheader.ToString();
        }
    }

    public sealed class Extra
    {
        public void LOADER_LOAD(object sender, RoutedEventArgs e)
        {
            var mfi = sender as MenuFlyoutItem;
            mfi.KeyboardAccelerators[0].Modifiers = Windows.System.VirtualKeyModifiers.Control | Windows.System.VirtualKeyModifiers.Shift;
        }
    }
}

请注意，我使用的是 Microsoft.UI.Xaml。

另外，抛出异常后，会出现这个banner： 单击“显示堆栈跟踪”按钮时，会出现：

The Solution Does Not Contain The Specified Document:

StreamJsonRpc.RemoteInvocationException: The solution does not contain the specified document.
   at StreamJsonRpc.JsonRpc.<InvokeCoreAsync>d__139`1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.CodeAnalysis.Remote.BrokeredServiceConnection`1.<TryInvokeAsync>d__20`1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at Microsoft.VisualStudio.Telemetry.WindowsErrorReporting.WatsonReport.GetClrWatsonExceptionInfo(Exception exceptionObject)
RPC server exception:
System.InvalidOperationException: The solution does not contain the specified document.
      at Microsoft.CodeAnalysis.Shared.Extensions.ISolutionExtensions.GetRequiredDocument(Solution solution, DocumentId documentId)
      at Microsoft.CodeAnalysis.EditAndContinue.RemoteEditAndContinueService.<>c__DisplayClass16_0.<<GetAdjustedActiveStatementSpansAsync>b__0>d.MoveNext()
   --- End of stack trace from previous location where exception was thrown ---
      at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
      at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
      at Microsoft.CodeAnalysis.Remote.BrokeredServiceBase.<RunServiceImplAsync>d__12`1.MoveNext()
   --- End of stack trace from previous location where exception was thrown ---
      at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
      at Microsoft.VisualStudio.Telemetry.WindowsErrorReporting.WatsonReport.GetClrWatsonExceptionInfo(Exception exceptionObject)