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在我的 WPF 应用程序中，我使用的是 LINQ to SQL，所以当我调用 时SubmitChanges()，它会引发异常，但我无法捕获它。

以下是相关代码：

try
{
    FeatureDataContext.Features.InsertOnSubmit(newFeature);
    FeatureDataContext.SubmitChanges();
}
catch (SqlException sqlEx)
{
    System.Windows.MessageBox.Show("CreateNewFeature : " + sqlEx.Message);
}

这是上面抛出的异常：

Exception Info: System.Data.SqlClient.SqlException
Stack:
   at System.Data.Linq.DataContext.SubmitChanges(System.Data.Linq.ConflictMode)
   at System.Data.Linq.DataContext.SubmitChanges()
   at [....]

如何SqlException在 WPF 应用程序中捕获？

我看到这SubmitChanges()不会引发任何异常。但是引发异常指向的代码是调用SubmitChanges().

编辑：

完整的例外是：

Application: CompositeApplicationLauncher.exe
Framework Version: v4.0.30319
Description: The process was terminated due to an unhandled exception.
Exception Info: System.Data.SqlClient.SqlException
Stack:
   at System.Data.Linq.DataContext.SubmitChanges(System.Data.Linq.ConflictMode)
   at System.Data.Linq.DataContext.SubmitChanges()
   at Runaware.Wpf.CompositeApplication.SessionReviewer.SessionDataProvider.CreateNewCategory(Runaware.InsightAnalysis.ApplicationFeatures.ObjectModel.ApplicationInfo)
   at Microsoft.Practices.Composite.Presentation.Commands.DelegateCommand`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].Execute(System.__Canon)
   at Microsoft.Practices.Composite.Presentation.Commands.DelegateCommand`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].System.Windows.Input.ICommand.Execute(System.Object)
   at Runaware.Wpf.CompositeApplication.Commands.DelegateExecute.ExecuteCaller(System.Object, System.Windows.RoutedEventArgs)
   at System.Windows.RoutedEventHandlerInfo.InvokeHandler(System.Object, System.Windows.RoutedEventArgs)
   at System.Windows.EventRoute.InvokeHandlersImpl(System.Object, System.Windows.RoutedEventArgs, Boolean)
   at System.Windows.UIElement.RaiseEventImpl(System.Windows.DependencyObject, System.Windows.RoutedEventArgs)
   at System.Windows.UIElement.RaiseEvent(System.Windows.RoutedEventArgs)
   at System.Windows.Controls.MenuItem.InvokeClickAfterRender(System.Object)
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(System.Delegate, System.Object, Int32)
   at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(System.Object, System.Delegate, System.Object, Int32, System.Delegate)
   at System.Windows.Threading.DispatcherOperation.InvokeImpl()
   at System.Windows.Threading.DispatcherOperation.InvokeInSecurityContext(System.Object)
   at System.Threading.ExecutionContext.runTryCode(System.Object)
   at System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode, CleanupCode, System.Object)
   at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object)
   at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
   at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object)
   at System.Windows.Threading.DispatcherOperation.Invoke()
   at System.Windows.Threading.Dispatcher.ProcessQueue()
   at System.Windows.Threading.Dispatcher.WndProcHook(IntPtr, Int32, IntPtr, IntPtr, Boolean ByRef)
   at MS.Win32.HwndWrapper.WndProc(IntPtr, Int32, IntPtr, IntPtr, Boolean ByRef)
   at MS.Win32.HwndSubclass.DispatcherCallbackOperation(System.Object)
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(System.Delegate, System.Object, Int32)
   at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(System.Object, System.Delegate, System.Object, Int32, System.Delegate)
   at System.Windows.Threading.Dispatcher.InvokeImpl(System.Windows.Threading.DispatcherPriority, System.TimeSpan, System.Delegate, System.Object, Int32)
   at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr, Int32, IntPtr, IntPtr)
   at MS.Win32.UnsafeNativeMethods.DispatchMessage(System.Windows.Interop.MSG ByRef)
   at System.Windows.Threading.Dispatcher.PushFrameImpl(System.Windows.Threading.DispatcherFrame)
   at System.Windows.Threading.Dispatcher.PushFrame(System.Windows.Threading.DispatcherFrame)
   at System.Windows.Threading.Dispatcher.Run()
   at System.Windows.Application.RunDispatcher(System.Object)
   at System.Windows.Application.RunInternal(System.Windows.Window)
   at System.Windows.Application.Run(System.Windows.Window)
   at System.Windows.Application.Run()
   at Runware.Wpf.CompositeApplication.App.Main()
4

1 回答 1

1

如果您提供的 try-catch 块在CreateNewCategory（查看堆栈跟踪）方法内，并且抛出的异常类型实际上是 SqlException，那么它应该被捕获。

或者，如果要捕获应用程序中的所有异常，则需要订阅Application.DispatcherUnhandledException事件以获取 UI 线程AppDomain.CurrentDomain.UnhandledException中的异常和其他线程中的异常。

于 2011-03-15T12:01:10.670 回答