XAMLParseException 让我抓狂!

Question

这个 XAMLParseException 让我抓狂!!我在 Visual Studio 1020 中使用 .NET 3.5 这是我的 xaml:

<Window x:Class="WinformsHost.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="Advanced Notepad" Height="350" Width="525" Loaded="Window_Loaded">
<DockPanel>
    <Menu DockPanel.Dock="Top">

        <MenuItem Header="File">
            <MenuItem Header="_New" />
            <MenuItem Header="_Open..." />
            <MenuItem Header="_Save" />
            <MenuItem Header="S_ave As..." />
            <Separator />
            <MenuItem Header="Page Setup" />
            <MenuItem Header="Print" />
            <Separator />
            <MenuItem Header="Exit" />
        </MenuItem>

        <MenuItem Header="Edit">
            <MenuItem Header="Undo" />
            <MenuItem Header="Redo" />
            <Separator />
            <MenuItem Header="Cut" />
            <MenuItem Header="Copy" />
            <MenuItem Header="Paste" />
            <MenuItem Header="Delete"  />
            <Separator />
            <MenuItem Header="Time/Date" />
            <Separator />
            <MenuItem Header="Preferences" />
        </MenuItem>

        <MenuItem Header="Format">
            <MenuItem Header="Word Wrap" IsCheckable="True" />
            <MenuItem Header="Font..." />
        </MenuItem>

        <MenuItem Header="View">
            <MenuItem Header="Status Bar" IsCheckable="True" />
        </MenuItem>

        <MenuItem Header="Language">
            <RadioButton x:Name="rbtCmake" Checked="rbtCmake_Checked" Content="Cmake" />
            <RadioButton x:Name="rbtCSharp" Content="C#" />
            <RadioButton x:Name="rbtHTML" Content="HTML" />
            <RadioButton x:Name="rbtPython" Content="Python" />
            <Separator />
            <RadioButton x:Name="rbtText" IsChecked="True" Content="Text" />
        </MenuItem>

        <MenuItem Header="Help">
            <MenuItem Header="View Help" />
            <Separator />
            <MenuItem Header="About Notepad" />
        </MenuItem>

    </Menu>
    <StatusBar x:Name="stbStatus" DockPanel.Dock="Bottom" Visibility="Collapsed">
        <TextBlock x:Name="txtStatus" Text="Status" />
    </StatusBar>
</DockPanel>
</Window>

那么这可能是我的代码？这是异常(exception)情况:
System.Windows.Markup.XamlParseException was unhandled
Message=Cannot create instance of 'MainWindow' defined in assembly 'Notepad, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'. Exception has been thrown by the target of an invocation. Error in markup file 'MainWindow.xaml' Line 1 Position 9.
Source=PresentationFramework
LineNumber=1
LinePosition=9
StackTrace:
at System.Windows.Markup.XamlParseException.ThrowException(String message, Exception innerException, Int32 lineNumber, Int32 linePosition, Uri baseUri, XamlObjectIds currentXamlObjectIds, XamlObjectIds contextXamlObjectIds, Type objectType)
at System.Windows.Markup.XamlParseException.ThrowException(ParserContext parserContext, Int32 lineNumber, Int32 linePosition, String message, Exception innerException)
at System.Windows.Markup.BamlRecordReader.ThrowExceptionWithLine(String message, Exception innerException)
at System.Windows.Markup.BamlRecordReader.CreateInstanceFromType(Type type, Int16 typeId, Boolean throwOnFail)
at System.Windows.Markup.BamlRecordReader.GetElementAndFlags(BamlElementStartRecord bamlElementStartRecord, Object& element, ReaderFlags& flags, Type& delayCreatedType, Int16& delayCreatedTypeId)
at System.Windows.Markup.BamlRecordReader.BaseReadElementStartRecord(BamlElementStartRecord bamlElementRecord)
at System.Windows.Markup.BamlRecordReader.ReadElementStartRecord(BamlElementStartRecord bamlElementRecord)
at System.Windows.Markup.BamlRecordReader.ReadRecord(BamlRecord bamlRecord)
at System.Windows.Markup.BamlRecordReader.Read(Boolean singleRecord)
at System.Windows.Markup.TreeBuilderBamlTranslator.ParseFragment()
at System.Windows.Markup.TreeBuilder.Parse()
at System.Windows.Markup.XamlReader.LoadBaml(Stream stream, ParserContext parserContext, Object parent, Boolean closeStream)
at System.Windows.Application.LoadBamlStreamWithSyncInfo(Stream stream, ParserContext pc)
at System.Windows.Application.LoadComponent(Uri resourceLocator, Boolean bSkipJournaledProperties)
at System.Windows.Application.DoStartup()
at System.Windows.Application.<.ctor>b__0(Object unused)
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Boolean isSingleParameter)
at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler)
at System.Windows.Threading.Dispatcher.WrappedInvoke(Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler)
at System.Windows.Threading.DispatcherOperation.InvokeImpl()
at System.Windows.Threading.DispatcherOperation.InvokeInSecurityContext(Object state)
at System.Threading.ExecutionContext.runTryCode(Object userData)
at System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode code, CleanupCode backoutCode, Object userData)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Windows.Threading.DispatcherOperation.Invoke()
at System.Windows.Threading.Dispatcher.ProcessQueue()
at System.Windows.Threading.Dispatcher.WndProcHook(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Boolean isSingleParameter)
at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler)
at System.Windows.Threading.Dispatcher.WrappedInvoke(Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler)
at System.Windows.Threading.Dispatcher.InvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Boolean isSingleParameter)
at System.Windows.Threading.Dispatcher.Invoke(DispatcherPriority priority, Delegate method, Object arg)
at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
at MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg)
at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)
at System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame)
at System.Windows.Threading.Dispatcher.Run()
at System.Windows.Application.RunDispatcher(Object ignore)
at System.Windows.Application.RunInternal(Window window)
at System.Windows.Application.Run(Window window)
at System.Windows.Application.Run()
at WinformsHost.App.Main() in C:\Users\Mohit\Documents\Visual Studio 2010\Projects\Notepad\Notepad\obj\x86\Debug\App.g.cs:line 0
at System.AppDomain._nExecuteAssembly(Assembly assembly, String[] args)
at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart()
InnerException: System.Reflection.TargetInvocationException
Message=Exception has been thrown by the target of an invocation.
Source=mscorlib
StackTrace:
at System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean noCheck, Boolean& canBeCached, RuntimeMethodHandle& ctor, Boolean& bNeedSecurityCheck)
at System.RuntimeType.CreateInstanceSlow(Boolean publicOnly, Boolean fillCache)
at System.RuntimeType.CreateInstanceImpl(Boolean publicOnly, Boolean skipVisibilityChecks, Boolean fillCache)
at System.Activator.CreateInstance(Type type, Boolean nonPublic)
at System.Windows.Markup.BamlRecordReader.CreateInstanceFromType(Type type, Int16 typeId, Boolean throwOnFail)
InnerException: NLog.Config.NLogConfigurationException
Message=Exception occured when loading configuration from 'C:\Users\Mohit\Documents\Visual Studio 2010\Projects\Notepad\Notepad\bin\Debug\NLog.config'
Source=NLog
StackTrace:
at NLog.Config.XmlLoggingConfiguration..ctor(String fileName, Boolean ignoreErrors)
at NLog.Config.XmlLoggingConfiguration..ctor(String fileName)
at NLog.LogFactory.get_Configuration()
at NLog.LogFactory.GetLogger(LoggerCacheKey cacheKey)
at NLog.LogFactory.GetLogger(String name)
at NLog.LogManager.GetCurrentClassLogger()
at WinformsHost.MainWindow..ctor() in C:\Users\Mohit\Documents\Visual Studio 2010\Projects\Notepad\Notepad\MainWindow.xaml.cs:line 15
InnerException: NLog.Config.NLogConfigurationException
Message=Target console not found.
Source=NLog
StackTrace:
at NLog.Config.XmlLoggingConfiguration.ConfigureRulesFromElement(LoggingConfiguration config, LoggingRuleCollection rules, XmlElement element)
at NLog.Config.XmlLoggingConfiguration.ConfigureFromXmlElement(XmlElement configElement, String baseDirectory)
at NLog.Config.XmlLoggingConfiguration.ConfigureFromFile(String fileName)
at NLog.Config.XmlLoggingConfiguration..ctor(String fileName, Boolean ignoreErrors)
InnerException:


Answer 1

我不认为这确实是一个 XamlParseException:我认为它是一个包含在 XamlParseException 中的 TargetInitationException。看看最终的内部异常:

NLog.Config.NLogConfigurationException Message=Exception occured when loading configuration from 'C:\Users\Mohit\Documents\Visual Studio 2010\Projects\Notepad\Notepad\bin\Debug\NLog.config'

您的配置文件似乎已损坏，可能是由于无效的 XML 或可能由于某些更具体的原因。

当您遇到神秘的 XamlParseException 时，总是值得检查 InnerException 中是否存在 TargetInvocationException(如果存在，则从那里深入研究)。是的，这非常令人困惑和误导!