小贝子编程

双击WPF数据网格会使程序崩溃



双击数据网格中的一行时，我想做点什么。我可以使用AutoGenerateColumn="False">来执行此操作，但当我尝试使用AutoGenerateCcolumns="True">

XAML

<Window x:Class="WpfApp6.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:WpfApp6"
mc:Ignorable="d"
Title="MainWindow" Height="350" Width="525">
<Grid>
<DataGrid Name="grid" AutoGenerateColumns="False" Loaded="grid_Loaded" MouseDoubleClick="grid_MouseDoubleClick">
<DataGrid.Columns >
<DataGridTextColumn Header="First Name" Binding="{Binding FirstName}"></DataGridTextColumn>
<DataGridTextColumn Header="User Name" Binding="{Binding UserName}"></DataGridTextColumn>
<DataGridTextColumn Header="Type" Binding="{Binding Type}"></DataGridTextColumn>
</DataGrid.Columns>
</DataGrid>
</Grid>
</Window>

XAML.CS

private void grid_Loaded(object sender, RoutedEventArgs e)
{
try
{
DataClassesDataContext connection = new DataClassesDataContext();
var query = (from operators in connection.SWOperators
select new
{
operators.FirstName,
operators.UserName,
operators.Type
}).ToList();
grid.ItemsSource = query;
}
catch (Exception exception)
{
MessageBox.Show(exception.Message);
}
}
private void grid_MouseDoubleClick(object sender, MouseButtonEventArgs e)
{
try
{
MessageBox.Show("Double click event is triggered.");
}
catch (Exception exception)
{
MessageBox.Show(exception.Message);
}
}

这是调试时调用堆栈中的文本

'WpfApp6.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:WindowsMicrosoft.NetassemblyGAC_32mscorlibv4.0_4.0.0.0__b77a5c561934e089mscorlib.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'WpfApp6.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'c:userskamaldocumentsvisual studio 2017ProjectsWpfApp6WpfApp6binDebugWpfApp6.exe'. Symbols loaded.
'WpfApp6.exe' (CLR v4.0.30319: WpfApp6.exe): Loaded 'C:WindowsMicrosoft.NetassemblyGAC_MSILPresentationFrameworkv4.0_4.0.0.0__31bf3856ad364e35PresentationFramework.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'WpfApp6.exe' (CLR v4.0.30319: WpfApp6.exe): Loaded 'C:WindowsMicrosoft.NetassemblyGAC_MSILWindowsBasev4.0_4.0.0.0__31bf3856ad364e35WindowsBase.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'WpfApp6.exe' (CLR v4.0.30319: WpfApp6.exe): Loaded 'C:WindowsMicrosoft.NetassemblyGAC_MSILSystem.Corev4.0_4.0.0.0__b77a5c561934e089System.Core.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'WpfApp6.exe' (CLR v4.0.30319: WpfApp6.exe): Loaded 'C:WindowsMicrosoft.NetassemblyGAC_MSILSystemv4.0_4.0.0.0__b77a5c561934e089System.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'WpfApp6.exe' (CLR v4.0.30319: WpfApp6.exe): Loaded 'C:WindowsMicrosoft.NetassemblyGAC_32PresentationCorev4.0_4.0.0.0__31bf3856ad364e35PresentationCore.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'WpfApp6.exe' (CLR v4.0.30319: WpfApp6.exe): Loaded 'C:WindowsMicrosoft.NetassemblyGAC_MSILSystem.Xamlv4.0_4.0.0.0__b77a5c561934e089System.Xaml.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
Step into: Stepping over non-user code 'WpfApp6.App..ctor'
'WpfApp6.exe' (CLR v4.0.30319: WpfApp6.exe): Loaded 'C:WindowsMicrosoft.NetassemblyGAC_MSILSystem.Configurationv4.0_4.0.0.0__b03f5f7f11d50a3aSystem.Configuration.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'WpfApp6.exe' (CLR v4.0.30319: WpfApp6.exe): Loaded 'C:WindowsMicrosoft.NetassemblyGAC_MSILSystem.Xmlv4.0_4.0.0.0__b77a5c561934e089System.Xml.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
Step into: Stepping over non-user code 'WpfApp6.App.InitializeComponent'
'WpfApp6.exe' (CLR v4.0.30319: WpfApp6.exe): Loaded 'C:WindowsMicrosoft.NetassemblyGAC_MSILPresentationFramework.Aero2v4.0_4.0.0.0__31bf3856ad364e35PresentationFramework.Aero2.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'WpfApp6.exe' (CLR v4.0.30319: WpfApp6.exe): Loaded 'C:WindowsMicrosoft.NetassemblyGAC_MSILPresentationFramework-SystemXmlv4.0_4.0.0.0__b77a5c561934e089PresentationFramework-SystemXml.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'WpfApp6.exe' (CLR v4.0.30319: WpfApp6.exe): Loaded 'C:UsersKamalAppDataLocalTempVisualStudio.XamlDiagnostics.9512Microsoft.VisualStudio.DesignTools.WpfTap.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'WpfApp6.exe' (CLR v4.0.30319: WpfApp6.exe): Loaded 'C:WindowsMicrosoft.NetassemblyGAC_MSILSystem.Runtime.Serializationv4.0_4.0.0.0__b77a5c561934e089System.Runtime.Serialization.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'WpfApp6.exe' (CLR v4.0.30319: WpfApp6.exe): Loaded 'C:WindowsMicrosoft.NetassemblyGAC_MSILSMDiagnosticsv4.0_4.0.0.0__b77a5c561934e089SMDiagnostics.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'WpfApp6.exe' (CLR v4.0.30319: WpfApp6.exe): Loaded 'C:WindowsMicrosoft.NetassemblyGAC_MSILSystem.ServiceModel.Internalsv4.0_4.0.0.0__31bf3856ad364e35System.ServiceModel.Internals.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'WpfApp6.exe' (CLR v4.0.30319: WpfApp6.exe): Loaded 'C:WindowsMicrosoft.NetassemblyGAC_MSILUIAutomationTypesv4.0_4.0.0.0__31bf3856ad364e35UIAutomationTypes.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'WpfApp6.exe' (CLR v4.0.30319: WpfApp6.exe): Loaded 'C:WindowsMicrosoft.NetassemblyGAC_MSILSystem.Data.Linqv4.0_4.0.0.0__b77a5c561934e089System.Data.Linq.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'WpfApp6.exe' (CLR v4.0.30319: WpfApp6.exe): Loaded 'C:WindowsMicrosoft.NetassemblyGAC_32System.Datav4.0_4.0.0.0__b77a5c561934e089System.Data.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'WpfApp6.exe' (CLR v4.0.30319: WpfApp6.exe): Loaded 'C:WindowsMicrosoft.NetassemblyGAC_32System.Transactionsv4.0_4.0.0.0__b77a5c561934e089System.Transactions.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'WpfApp6.exe' (CLR v4.0.30319: WpfApp6.exe): Loaded 'C:WindowsMicrosoft.NetassemblyGAC_32System.EnterpriseServicesv4.0_4.0.0.0__b03f5f7f11d50a3aSystem.EnterpriseServices.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'WpfApp6.exe' (CLR v4.0.30319: WpfApp6.exe): Loaded 'C:WindowsMicrosoft.NetassemblyGAC_32System.EnterpriseServicesv4.0_4.0.0.0__b03f5f7f11d50a3aSystem.EnterpriseServices.Wrapper.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'WpfApp6.exe' (CLR v4.0.30319: WpfApp6.exe): Loaded 'C:WindowsMicrosoft.NetassemblyGAC_MSILUIAutomationProviderv4.0_4.0.0.0__31bf3856ad364e35UIAutomationProvider.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'WpfApp6.exe' (CLR v4.0.30319: WpfApp6.exe): Loaded 'C:WindowsMicrosoft.NetassemblyGAC_MSILSystem.Xml.Linqv4.0_4.0.0.0__b77a5c561934e089System.Xml.Linq.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'WpfApp6.exe' (CLR v4.0.30319: WpfApp6.exe): Loaded 'Anonymously Hosted DynamicMethods Assembly'. 
'WpfApp6.exe' (CLR v4.0.30319: WpfApp6.exe): Loaded 'C:WindowsMicrosoft.NetassemblyGAC_MSILSystem.Runtime.Cachingv4.0_4.0.0.0__b03f5f7f11d50a3aSystem.Runtime.Caching.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'WpfApp6.exe' (CLR v4.0.30319: WpfApp6.exe): Loaded 'C:WindowsMicrosoft.NetassemblyGAC_MSILPresentationFramework-SystemDatav4.0_4.0.0.0__b77a5c561934e089PresentationFramework-SystemData.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'WpfApp6.exe' (CLR v4.0.30319: WpfApp6.exe): Loaded 'C:WindowsMicrosoft.NetassemblyGAC_MSILSystem.Numericsv4.0_4.0.0.0__b77a5c561934e089System.Numerics.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
'WpfApp6.exe' (CLR v4.0.30319: WpfApp6.exe): Loaded 'C:WindowsMicrosoft.NetassemblyGAC_MSILPresentationFramework-SystemXmlLinqv4.0_4.0.0.0__b77a5c561934e089PresentationFramework-SystemXmlLinq.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
System.Transactions Critical: 0 : <TraceRecord xmlns="http://schemas.microsoft.com/2004/10/E2ETraceEvent/TraceRecord" Severity="Critical"><TraceIdentifier>http://msdn.microsoft.com/TraceCodes/System/ActivityTracing/2004/07/Reliability/Exception/Unhandled</TraceIdentifier><Description>Unhandled exception</Description><AppDomain>WpfApp6.exe</AppDomain><Exception><ExceptionType>System.InvalidOperationException, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</ExceptionType><Message>A TwoWay or OneWayToSource binding cannot work on the read-only property 'UserName' of type '&amp;lt;&amp;gt;f__AnonymousType0`3[System.String,System.String,System.String]'.</Message><StackTrace>   at MS.Internal.Data.PropertyPathWorker.CheckReadOnly(Object item, Object info)
at MS.Internal.Data.PropertyPathWorker.ReplaceItem(Int32 k, Object newO, Object parent)
at MS.Internal.Data.PropertyPathWorker.UpdateSourceValueState(Int32 k, ICollectionView collectionView, Object newValue, Boolean isASubPropertyChange)
at MS.Internal.Data.ClrBindingWorker.AttachDataItem()
at System.Windows.Data.BindingExpression.Activate(Object item)
at System.Windows.Data.BindingExpression.AttachToContext(AttachAttempt attempt)
at System.Windows.Data.BindingExpression.MS.Internal.Data.IDataBindEngineClient.AttachToContext(Boolean lastChance)
at MS.Internal.Data.DataBindEngine.Task.Run(Boolean lastChance)
at MS.Internal.Data.DataBindEngine.Run(Object arg)
at MS.Internal.Data.DataBindEngine.OnLayoutUpdated(Object sender, EventArgs e)
at System.Windows.ContextLayoutManager.fireLayoutUpdateEvent()
at System.Windows.ContextLayoutManager.UpdateLayout()
at System.Windows.UIElement.UpdateLayout()
at System.Windows.Controls.DataGridCell.BeginEdit(RoutedEventArgs e)
at System.Windows.Controls.DataGrid.OnExecutedBeginEdit(ExecutedRoutedEventArgs e)
at System.Windows.Controls.DataGrid.OnExecutedBeginEdit(Object sender, ExecutedRoutedEventArgs e)
at System.Windows.Input.CommandBinding.OnExecuted(Object sender, ExecutedRoutedEventArgs e)
at System.Windows.Input.CommandManager.ExecuteCommandBinding(Object sender, ExecutedRoutedEventArgs e, CommandBinding commandBinding)
at System.Windows.Input.CommandManager.FindCommandBinding(Object sender, RoutedEventArgs e, ICommand command, Boolean execute)
at System.Windows.Input.CommandManager.OnExecuted(Object sender, ExecutedRoutedEventArgs e)
at System.Windows.UIElement.OnExecutedThunk(Object sender, ExecutedRoutedEventArgs e)
at System.Windows.Input.ExecutedRoutedEventArgs.InvokeEventHandler(Delegate genericHandler, Object target)
at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
at System.Windows.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted)
at System.Windows.Input.RoutedCommand.ExecuteImpl(Object parameter, IInputElement target, Boolean userInitiated)
at System.Windows.Input.RoutedCommand.Execute(Object parameter, IInputElement target)
at System.Windows.Controls.DataGrid.BeginEdit(RoutedEventArgs editingEventArgs)
at System.Windows.Controls.DataGridCell.OnAnyMouseLeftButtonDown(MouseButtonEventArgs e)
at System.Windows.Controls.DataGridCell.OnAnyMouseLeftButtonDownThunk(Object sender, MouseButtonEventArgs e)
at System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)
at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
at System.Windows.UIElement.ReRaiseEventAs(DependencyObject sender, RoutedEventArgs args, RoutedEvent newEvent)
at System.Windows.UIElement.OnMouseDownThunk(Object sender, MouseButtonEventArgs e)
at System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)
at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
at System.Windows.UIElement.RaiseTrustedEvent(RoutedEventArgs args)
at System.Windows.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted)
at System.Windows.Input.InputManager.ProcessStagingArea()
at System.Windows.Input.InputManager.ProcessInput(InputEventArgs input)
at System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport)
at System.Windows.Interop.HwndMouseInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawMouseActions actions, Int32 x, Int32 y, Int32 wheel)
at System.Windows.Interop.HwndMouseInputProvider.FilterMessage(IntPtr hwnd, WindowMessage msg, IntPtr wParam, IntPtr lParam, Boolean&amp;amp; handled)
at System.Windows.Interop.HwndSource.InputFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean&amp;amp; handled)
at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean&amp;amp; handled)
at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
at System.Windows.Threading.Dispatcher.LegacyInvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs)
at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
at MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG&amp;amp; msg)
at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)
at System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame)
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 WpfApp6.App.Main()</StackTrace><ExceptionString>System.InvalidOperationException: A TwoWay or OneWayToSource binding cannot work on the read-only property 'UserName' of type '&amp;lt;&amp;gt;f__AnonymousType0`3[System.String,System.String,System.String]'.
at MS.Internal.Data.PropertyPathWorker.CheckReadOnly(Object item, Object info)
at MS.Internal.Data.PropertyPathWorker.ReplaceItem(Int32 k, Object newO, Object parent)
at MS.Internal.Data.PropertyPathWorker.UpdateSourceValueState(Int32 k, ICollectionView collectionView, Object newValue, Boolean isASubPropertyChange)
at MS.Internal.Data.ClrBindingWorker.AttachDataItem()
at System.Windows.Data.BindingExpression.Activate(Object item)
at System.Windows.Data.BindingExpression.AttachToContext(AttachAttempt attempt)
at System.Windows.Data.BindingExpression.MS.Internal.Data.IDataBindEngineClient.AttachToContext(Boolean lastChance)
at MS.Internal.Data.DataBindEngine.Task.Run(Boolean lastChance)
at MS.Internal.Data.DataBindEngine.Run(Object arg)
at MS.Internal.Data.DataBindEngine.OnLayoutUpdated(Object sender, EventArgs e)
at System.Windows.ContextLayoutManager.fireLayoutUpdateEvent()
at System.Windows.ContextLayoutManager.UpdateLayout()
at System.Windows.UIElement.UpdateLayout()
at System.Windows.Controls.DataGridCell.BeginEdit(RoutedEventArgs e)
at System.Windows.Controls.DataGrid.OnExecutedBeginEdit(ExecutedRoutedEventArgs e)
at System.Windows.Controls.DataGrid.OnExecutedBeginEdit(Object sender, ExecutedRoutedEventArgs e)
at System.Windows.Input.CommandBinding.OnExecuted(Object sender, ExecutedRoutedEventArgs e)
at System.Windows.Input.CommandManager.ExecuteCommandBinding(Object sender, ExecutedRoutedEventArgs e, CommandBinding commandBinding)
at System.Windows.Input.CommandManager.FindCommandBinding(Object sender, RoutedEventArgs e, ICommand command, Boolean execute)
at System.Windows.Input.CommandManager.OnExecuted(Object sender, ExecutedRoutedEventArgs e)
at System.Windows.UIElement.OnExecutedThunk(Object sender, ExecutedRoutedEventArgs e)
at System.Windows.Input.ExecutedRoutedEventArgs.InvokeEventHandler(Delegate genericHandler, Object target)
at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
at System.Windows.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted)
at System.Windows.Input.RoutedCommand.ExecuteImpl(Object parameter, IInputElement target, Boolean userInitiated)
at System.Windows.Input.RoutedCommand.Execute(Object parameter, IInputElement target)
at System.Windows.Controls.DataGrid.BeginEdit(RoutedEventArgs editingEventArgs)
at System.Windows.Controls.DataGridCell.OnAnyMouseLeftButtonDown(MouseButtonEventArgs e)
at System.Windows.Controls.DataGridCell.OnAnyMouseLeftButtonDownThunk(Object sender, MouseButtonEventArgs e)
at System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)
at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
at System.Windows.UIElement.ReRaiseEventAs(DependencyObject sender, RoutedEventArgs args, RoutedEvent newEvent)
at System.Windows.UIElement.OnMouseDownThunk(Object sender, MouseButtonEventArgs e)
at System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)
at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
at System.Windows.UIElement.RaiseTrustedEvent(RoutedEventArgs args)
at System.Windows.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted)
at System.Windows.Input.InputManager.ProcessStagingArea()
at System.Windows.Input.InputManager.ProcessInput(InputEventArgs input)
at System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport)
at System.Windows.Interop.HwndMouseInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawMouseActions actions, Int32 x, Int32 y, Int32 wheel)
at System.Windows.Interop.HwndMouseInputProvider.FilterMessage(IntPtr hwnd, WindowMessage msg, IntPtr wParam, IntPtr lParam, Boolean&amp;amp; handled)
at System.Windows.Interop.HwndSource.InputFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean&amp;amp; handled)
at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean&amp;amp; handled)
at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
at System.Windows.Threading.Dispatcher.LegacyInvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs)
at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
at MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG&amp;amp; msg)
at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)
at System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame)
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 WpfApp6.App.Main()</ExceptionString><DataItems><Data></Data></DataItems></Exception></TraceRecord>
An unhandled exception of type 'System.InvalidOperationException' occurred in PresentationFramework.dll
A TwoWay or OneWayToSource binding cannot work on the read-only property 'UserName' of type '<>f__AnonymousType0`3[System.String,System.String,System.String]'.

如何解决这个问题？

异常消息告诉您使用双向绑定绑定了只读属性：

<Message>A TwoWay or OneWayToSource binding cannot work on the read-only 
property 'UserName' of type '&amp;lt;&amp;gt;f__AnonymousType0`3[System.String,System.String,System.String]'.
</Message>

看起来是这样的：

<DataGridTextColumn 
Header="User Name" 
Binding="{Binding UserName}">
</DataGridTextColumn>

所以将其更改为单向绑定。

<DataGridTextColumn 
Header="User Name" 
Binding="{Binding UserName, Mode=OneWay}">
</DataGridTextColumn>

您可能需要对绑定到相同匿名类型对象的属性的其他列执行同样的操作。

您可能也想将该列设为只读：

<DataGridTextColumn 
Header="User Name" 
IsReadOnly="True"
Binding="{Binding UserName, Mode=OneWay}">
</DataGridTextColumn>

始终查找异常消息；你通常可以，在极少数情况下，当它不能直接引导你找到答案时，它会让你离它更近。

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