Question

我刚刚安装了Windows 10 Build 16232，并使用UWP，.NET和Xamarin“默认”软件包安装了Visual Studio Community 2017 Preview。我创建了一个空白的UWP应用程序，放置了一个TextBox，然后......出错了。

这是XAML：

<Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
    <TextBox Text="Hello World!"/>
</Grid>

现在，对于错误：

Exception: Unable to create an instance of "TextBox". 

at Microsoft.VisualStudio.DesignTools.Designer.InstanceBuilders.InstanceBuilderOperations.InstantiateType(Type type, Boolean supportInternal)
at Microsoft.VisualStudio.DesignTools.Designer.InstanceBuilders.ClrObjectInstanceBuilder.InstantiateTargetType(ILocalInstanceBuilderContext context, ViewNode viewNode)
at Microsoft.VisualStudio.DesignTools.Designer.InstanceBuilders.ClrObjectInstanceBuilder.Instantiate(ILocalInstanceBuilderContext context, ViewNode viewNode)
at Microsoft.VisualStudio.DesignTools.UwpDesigner.InstanceBuilders.FrameworkElementInstanceBuilder.Instantiate(ILocalInstanceBuilderContext context, ViewNode viewNode)
at Microsoft.VisualStudio.DesignTools.Designer.InstanceBuilders.LocalInstanceManager.CreateInstance(IInstanceBuilder builder, ViewNode viewNode)

TargetInvocationException : Exception has been thrown by the target of an invocation.

at System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean noCheck, Boolean& canBeCached, RuntimeMethodHandleInternal& ctor, Boolean& bNeedSecurityCheck)
at System.RuntimeType.CreateInstanceSlow(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache, StackCrawlMark& stackMark)
at System.RuntimeType.CreateInstanceDefaultCtor(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache, StackCrawlMark& stackMark)
at System.Activator.CreateInstance(Type type, Boolean nonPublic)

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

at Windows.UI.Xaml.Controls.TextBox..ctor()

这是我试过的：

调试x86
Debug ARM
调试x64
以管理员身份运行
chkdsk
重新安装Visual Studio
重新安装Windows 10 Build 16232 （慢速环）
安装Visual Studio Community 2017
卸载Xamarin
升级到Windows 10 Build 16241 （快速响铃）

其他常用控件执行工作，但不是那个。我如何使其工作？问题只出在设计师身上;我可以很好地编译应用程序。

Answer 1

感谢您的反馈。这是一个已修复的已知问题。正如@Justin XL所说，您可以将系统更新为Windows 10 Insider Preview Build 16251以解决此问题。这是现在的最新版本。升级后，您可能需要清理并重建项目并重新打开页面，然后TextBox应该能够在XAML Designer中显示错误。

例外：无法在Windows 10 Build 16232中创建“TextBox”实例

1 个答案: