将CodedUI dll导入WPF应用程序，然后引发空引用引用 [英] import CodedUI dlls into WPF application then throw null reference expcetion
问题描述
hi, I want to have a application that can control the tests, so I'm trying to not using codedUI project but create a WPF project then import the following assemblies instead:
然后我在MainWindow.Xaml中创建一个按钮，并将以下代码提供给它的click事件:
ApplicationUnderTest app = ApplicationUnderTest.Launch (Environment.GetFolderPath(Environment.SpecialFolder.Windows)+ @"\ system32 \ calc.exe" );
，则将发生以下错误，我尝试了不同的方法，但是由于来自
then the following error will occur, I try different ways but they all failed due to null reference exception from
Microsoft.VisualStudio.TestTools.UITesting,can you give some advice, thanks.
Microsoft.VisualStudio.TestTools.UITest.Extension.FailedToLaunchApplicationException未处理
HResult = -268111863
Message =启动此过程时发生以下错误:对象引用未设置为对象的实例文件:C:\ Windows \ system32 \ calc.exe.
; Source = Microsoft.VisualStudio.TestTools.UITesting
BasicMessage =启动此过程时发生以下错误:对象引用未设置为对象的实例. \ Windows \ system32 \ calc.exe.
StackTrace:
在Microsoft.VisualStudio.TestTools中. UITesting.ApplicationUnderTest.Start(ProcessStartInfo startInfo)
在Microsoft.VisualStudio.TestTools.UITesting.ApplicationUnderTest.. ctor(字符串fileName，字符串alterFileName，字符串参数)
在Microsoft.VisualStudio.TestTools.UITesting.ApplicationUnderTest.<> c__DisplayClass1.< Launch> b__0()
at Microsoft.VisualStudio.TestTools.UITesting.CodedUITestMethodInvoker.InvokeMethod [T](Func`1函数，UITestControl控件，布尔型firePlaybackErrorEvent，布尔型logAsAction)
at Microsoft.VisualStudio.TestTools.UITesting.ApplicationUnderTest.Launch(字符串fileName，字符串alterFileName，字符串参数)
at Microsoft.VisualStudio.TestTools.UITesting.ApplicationUnderTest.Launch(String fileName)
在c:\ Users \ j-xiaozh \ Desktop \ CarPlateSHTest \ CarPlateSHTest \ MainWindow.xaml.cs:第36行
at System.Windows.EventRoute.InvokeHandlersImpl(对象源，RoutedEventArgs参数，布尔值重新引发)
位于System.Windows.UIElement.RaiseEventImpl(DependencyObject发送者，RoutedEventArgs参数)
在System.Windows.Controls.Button.OnClick()
at System.Windows.Controls.Primitives.ButtonBase.OnMouseLeftButtonUp(MouseButtonEventArgs e)
在System.Windows.RoutedEventArgs.InvokeHandler(委托处理程序，对象目标)处
at System.Windows.EventRoute.InvokeHandlersImpl(对象源，RoutedEventArgs参数，布尔值重新引发)
at System.Windows.UIElement.ReRaiseEventAs(DependencyObject发送者，RoutedEventArgs参数，RoutedEvent newEvent)
在System.Windows.RoutedEventArgs.InvokeHandler(委托处理程序，对象目标)处
at System.Windows.EventRoute.InvokeHandlersImpl(对象源，RoutedEventArgs参数，布尔值重新引发)
位于System.Windows.UIElement.RaiseEventImpl(DependencyObject发送者，RoutedEventArgs参数)
在System.Windows.UIElement.RaiseTrustedEvent(RoutedEventArgs args)中
在System.Windows.Input.InputManager.ProcessStagingArea()
在System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport)
at System.Windows.Interop.HwndMouseInputProvider.ReportInput(IntPtr hwnd，InputMode模式，Int32时间戳，RawMouseActions操作，Int32 x，Int32 y，Int32滚轮)
在System.Windows.Interop.HwndMouseInputProvider.FilterMessage(IntPtr hwnd，WindowMessage消息，IntPtr wParam，IntPtr lParam，布尔值和已处理)
at System.Windows.Interop.HwndSource.InputFilterMessage(IntPtr hwnd，Int32 msg，IntPtr wParam，IntPtr lParam，布尔值和已处理)
在MS.Win32.HwndWrapper.WndProc中(IntPtr hwnd，Int32 msg，IntPtr wParam，IntPtr lParam，布尔值和已处理)
位于MS.Win32.HwndSubclass.DispatcherCallbackOperation(对象o)
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(委托回调，对象args，Int32 numArgs)
在MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(对象源，委托方法，对象args，Int32 numArgs，委托catchHandler)
在System.Windows.Threading.Dispatcher.LegacyInvokeImpl中(DispatcherPriority优先级，TimeSpan超时，Delegate方法，对象args，Int32 numArgs)
at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd，Int32 msg，IntPtr wParam，IntPtr lParam)
at MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg)
在System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)
在System.Windows.Application.RunInternal(窗口"窗口中)
在System.Windows.Application.Run()
在c:\ Users \ j-xiaozh \ Desktop \ CarPlateSHTest \ CarPlateSHTest \ obj \ Debug \ App.g.cs:line 0中的CarPlateSHTest.App.Main()
; 在System.AppDomain._nExecuteAssembly(RuntimeAssembly程序集，String []参数)
在Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
在System.Threading.ExecutionContext.RunInternal(ExecutionContext执行上下文，ContextCallback回调，对象状态，布尔值saveSyncCtx)
位于System.Threading.ExecutionContext.Run(ExecutionContext执行上下文，ContextCallback回调，对象状态，布尔值saveSyncCtx)
在System.Threading.ExecutionContext.Run(ExecutionContext执行上下文，ContextCallback回调，对象状态)中
在System.Threading.ThreadHelper.ThreadStart()
InnerException:System.NullReferenceException
HResult = -2147467261
Message =对象引用未设置为对象的实例.
Source = Microsoft.VisualStudio.TestTools.UITest.Playback
StackTrace:
在Microsoft.VisualStudio.TestTools.UITest.Playback.ScreenElement.FindFromWindowHandle(IntPtr windowHandle)
在Microsoft.VisualStudio.TestTools.UITesting.UITestControl..ctor(IntPtr windowHandle)中
在Microsoft.VisualStudio.TestTools.UITesting.UITestControl.FromWindowHandle(IntPtr windowHandle)中
在Microsoft.VisualStudio.TestTools.UITesting.ApplicationUnderTest.SetCurrentProcessPrivate(过程值)
在Microsoft.VisualStudio.TestTools.UITesting.ApplicationUnderTest.<> c__DisplayClassb.< set_Process> b__a()
在Microsoft.VisualStudio.TestTools.UITesting.CodedUITestMethodInvoker.InvokeMethod [T](Func`1函数，UITestControl控件，布尔firePlaybackErrorEvent，布尔logAsAction)
在Microsoft.VisualStudio.TestTools.UITesting.ApplicationUnderTest.set_Process(过程值)
在Microsoft.VisualStudio.TestTools.UITesting.ApplicationUnderTest.Start(ProcessStartInfo startInfo)
InnerException:
Microsoft.VisualStudio.TestTools.UITest.Extension.FailedToLaunchApplicationException was unhandled
HResult=-268111863
Message=The following error occurred when this process was started: Object reference not set to an instance of an object. File: C:\Windows\system32\calc.exe.
Source=Microsoft.VisualStudio.TestTools.UITesting
BasicMessage=The following error occurred when this process was started: Object reference not set to an instance of an object. File: C:\Windows\system32\calc.exe.
StackTrace:
at Microsoft.VisualStudio.TestTools.UITesting.ApplicationUnderTest.Start(ProcessStartInfo startInfo)
at Microsoft.VisualStudio.TestTools.UITesting.ApplicationUnderTest..ctor(String fileName, String alternateFileName, String arguments)
at Microsoft.VisualStudio.TestTools.UITesting.ApplicationUnderTest.<>c__DisplayClass1.<Launch>b__0()
at Microsoft.VisualStudio.TestTools.UITesting.CodedUITestMethodInvoker.InvokeMethod[T](Func`1 function, UITestControl control, Boolean firePlaybackErrorEvent, Boolean logAsAction)
at Microsoft.VisualStudio.TestTools.UITesting.ApplicationUnderTest.Launch(String fileName, String alternateFileName, String arguments)
at Microsoft.VisualStudio.TestTools.UITesting.ApplicationUnderTest.Launch(String fileName)
at CarPlateSHTest.MainWindow.Button_Click(Object sender, RoutedEventArgs e) in c:\Users\j-xiaozh\Desktop\CarPlateSHTest\CarPlateSHTest\MainWindow.xaml.cs:line 36
at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
at System.Windows.Controls.Button.OnClick()
at System.Windows.Controls.Primitives.ButtonBase.OnMouseLeftButtonUp(MouseButtonEventArgs e)
at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
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.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
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.Input.InputManager.ProcessStagingArea()
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& handled)
at System.Windows.Interop.HwndSource.InputFilterMessage(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, Int32 numArgs)
at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, 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& msg)
at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)
at System.Windows.Application.RunInternal(Window window)
at System.Windows.Application.Run()
at CarPlateSHTest.App.Main() in c:\Users\j-xiaozh\Desktop\CarPlateSHTest\CarPlateSHTest\obj\Debug\App.g.cs:line 0
at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart()
InnerException: System.NullReferenceException
HResult=-2147467261
Message=Object reference not set to an instance of an object.
Source=Microsoft.VisualStudio.TestTools.UITest.Playback
StackTrace:
at Microsoft.VisualStudio.TestTools.UITest.Playback.ScreenElement.FindFromWindowHandle(IntPtr windowHandle)
at Microsoft.VisualStudio.TestTools.UITesting.UITestControl..ctor(IntPtr windowHandle)
at Microsoft.VisualStudio.TestTools.UITesting.UITestControl.FromWindowHandle(IntPtr windowHandle)
at Microsoft.VisualStudio.TestTools.UITesting.ApplicationUnderTest.SetCurrentProcessPrivate(Process value)
at Microsoft.VisualStudio.TestTools.UITesting.ApplicationUnderTest.<>c__DisplayClassb.<set_Process>b__a()
at Microsoft.VisualStudio.TestTools.UITesting.CodedUITestMethodInvoker.InvokeMethod[T](Func`1 function, UITestControl control, Boolean firePlaybackErrorEvent, Boolean logAsAction)
at Microsoft.VisualStudio.TestTools.UITesting.ApplicationUnderTest.set_Process(Process value)
at Microsoft.VisualStudio.TestTools.UITesting.ApplicationUnderTest.Start(ProcessStartInfo startInfo)
InnerException:
推荐答案
请尝试在按钮点击方法中添加Playback.Initialize()和Plauback.Cleanup()代码.
Reference: http://blogs.microsoft.co.il/shair/2010/07/15/running-codedui-test-from-another-application/
谢谢
这篇关于将CodedUI dll导入WPF应用程序，然后引发空引用引用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
