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我在我在项目中创建的文件夹(“视图”)中向我的项目添加了一个“基本页面”。

起初一切都很好,但“突然”设计视图失败并显示:

System.ObjectDisposedException 安全句柄已关闭

这是 XAML(我还没有更改生成的默认 XAML 中的任何内容):

<common:LayoutAwarePage
    x:Name="pageRoot"
    x:Class="TimeAndSpaceLines.View.SectionPage"
    DataContext="{Binding DefaultViewModel, RelativeSource={RelativeSource Self}}"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:TimeAndSpaceLines.View"
    xmlns:common="using:TimeAndSpaceLines.Common"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d">

    <Page.Resources>

        <!-- TODO: Delete this line if the key AppName is declared in App.xaml -->
        <x:String x:Key="AppName">My Application</x:String>
    </Page.Resources>

    <!--
        This grid acts as a root panel for the page that defines two rows:
        * Row 0 contains the back button and page title
        * Row 1 contains the rest of the page layout
    -->
    <Grid Style="{StaticResource LayoutRootStyle}">
        <Grid.RowDefinitions>
            <RowDefinition Height="140"/>
            <RowDefinition Height="*"/>
        </Grid.RowDefinitions>

        <!-- Back button and page title -->
        <Grid>
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="Auto"/>
                <ColumnDefinition Width="*"/>
            </Grid.ColumnDefinitions>
            <Button x:Name="backButton" Click="GoBack" IsEnabled="{Binding Frame.CanGoBack, ElementName=pageRoot}" Style="{StaticResource BackButtonStyle}"/>
            <TextBlock x:Name="pageTitle" Grid.Column="1" Text="{StaticResource AppName}" Style="{StaticResource PageHeaderTextStyle}"/>
        </Grid>

        <VisualStateManager.VisualStateGroups>

            <!-- Visual states reflect the application's view state -->
            <VisualStateGroup x:Name="ApplicationViewStates">
                <VisualState x:Name="FullScreenLandscape"/>
                <VisualState x:Name="Filled"/>

                <!-- The entire page respects the narrower 100-pixel margin convention for portrait -->
                <VisualState x:Name="FullScreenPortrait">
                    <Storyboard>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="backButton" Storyboard.TargetProperty="Style">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource PortraitBackButtonStyle}"/>
                        </ObjectAnimationUsingKeyFrames>
                    </Storyboard>
                </VisualState>

                <!-- The back button and title have different styles when snapped -->
                <VisualState x:Name="Snapped">
                    <Storyboard>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="backButton" Storyboard.TargetProperty="Style">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource SnappedBackButtonStyle}"/>
                        </ObjectAnimationUsingKeyFrames>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetName="pageTitle" Storyboard.TargetProperty="Style">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource SnappedPageHeaderTextStyle}"/>
                        </ObjectAnimationUsingKeyFrames>
                    </Storyboard>
                </VisualState>
            </VisualStateGroup>
        </VisualStateManager.VisualStateGroups>
    </Grid>
</common:LayoutAwarePage>

注意:我确实尝试根据“TODO”(它在 app.xaml 中)删除“appname”行,但这没有任何区别。该应用程序通过 F6 成功构建,但尝试重新加载设计器失败。

第二次尝试,这次使用空白 xaml 页面,然后粘贴我在 Kaxaml 中拼凑的一些 XAML,也失败了,这次出现错误消息:“无法注册 System.Exception 包。(来自 HRESULT 的异常: 0x80073CF6) "

此 XAML 为(截断):

<Page
    x:Class="TimeAndSpaceLines.View.SectionN"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:TimeAndSpaceLines.View"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d">

    <Grid MinHeight="600" ShowGridLines="True" Background="{StaticResource ApplicationPageBackgroundThemeBrush}">
                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="320">
                    </ColumnDefinition>
                    <ColumnDefinition MaxWidth="800">
                    </ColumnDefinition>
                </Grid.ColumnDefinitions>
                <Grid.RowDefinitions>
                    <RowDefinition>
                    </RowDefinition>
    . . .

???

4

1 回答 1

2

我有同样的问题,似乎问题是VS在开始调试之前试图“部署”你的任何应用程序。但这种部署可能会被 Windows 本地组策略禁止。因此,您需要执行以下步骤:

  1. 按 Win + X 打开运行对话框,输入 gpedit.msc 并回车;
  2. 转到计算机配置 > 管理模板 > Windows 组件 > 应用程序包部署;
  3. 双击“允许安装所有受信任的应用程序”,选择启用并选择确定;

它对我有帮助。

于 2012-12-01T18:56:10.367 回答