在异步方法中运行同步命令

stw · 发表于 2022-3-24 10:39:42

您好，
我有一些异步方法（如web请求），需要在一系列命令之间调用。我需要子命令同步运行，因此无法使用CommandAsync（），因为子命令具有用户交互，我希望等待所有这些都完成（子命令例如可以获得选择集）
Autodesk.AutoCAD.Runtime。例外：eInvalidInput
示例：

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    [CommandMethod("CMD_TEST")]
    public static async void CmdTest()
    {
        var activeDoc = Application.DocumentManager.MdiActiveDocument;
        Editor editor = activeDoc.Editor;
        await Task.Delay(100);   // this could be e.g. some async web request in practice
        try
        {
            editor.Command("BCOUNT");  // some dummy command
            editor.WriteMessage("finished CMD_TEST\n");
        }
        catch (Exception ex)
        {
            editor.WriteMessage("failed CMD_TEST\n");
        }
    }

原因是什么，如何解决
为完整起见，以下是一个工作和非工作命令（）调用的两个堆栈：

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>        test_autocad.dll!Tools.AutoCAD.CommandsTest.CmdTestWorking()
         accoremgd.dll!Autodesk.AutoCAD.Runtime.CommandClass.InvokeWorker(System.Reflection.MethodInfo mi, object commandObject, bool bLispFunction)
         accoremgd.dll!Autodesk.AutoCAD.Runtime.CommandClass.InvokeWorkerWithExceptionFilter(System.Reflection.MethodInfo mi, object commandObject, bool bLispFunction)
         accoremgd.dll!Autodesk.AutoCAD.Runtime.CommandClass.CommandThunk.Invoke()
         [Native to Managed Transition]        
         accore.dll!CCmdThroat::arxCallNativeFunction()
         accore.dll!Command::doCommand()
         accore.dll!runTheCommand()
         accore.dll!CommandProcessor::mainCmdLoop()
         accore.dll!CCmdThroat::Run()
         accore.dll!AcApAppImp::internalRun()
         accore.dll!AcApAppImp::run(void)
         acad.exe!00007ff764026c41()
         mfc140u.dll!00007ff8109a3840()
         acad.exe!00007ff764039602()
         kernel32.dll!00007ff859ca7034()
         ntdll.dll!00007ff85b822651()
>        test_autocad.dll!Tools.AutoCAD.CommandsTest.CmdTestFailing()
         [Resuming Async Method]        
         mscorlib.dll!System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)
         mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)
         mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.MoveNextRunner.Run()
         mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.OutputAsyncCausalityEvents.AnonymousMethod__0()
         mscorlib.dll!System.Runtime.CompilerServices.TaskAwaiter.OutputWaitEtwEvents.AnonymousMethod__0()
         mscorlib.dll!System.Threading.Tasks.SynchronizationContextAwaitTaskContinuation.GetActionLogDelegate.AnonymousMethod__0()
         acpal.dll!00007fffe380d218()
         acpal.dll!00007fffe380d2e4()
         accore.dll!AcApAppImp::notifyMessagePreviewObservers(struct tagMSG &,bool)
         accore.dll!AcApApp::notifyMessagePreviewObservers(struct tagMSG &)
         acad.exe!CAcadApp::PreTranslateMessage()
         mfc140u.dll!AfxInternalPumpMessage()
         acad.exe!CAcadApp::PumpMessage(void)
         acad.exe!CAcadApp::runMessageLoop()
         accore.dll!AcApAppImp::runMessageLoop(void)
         accore.dll!win_event(void)
         accore.dll!CCmdThroat::select_device()
         accore.dll!CDig::digin()
         accore.dll!CAcCoreInput::GetRawInput()
         accore.dll!CAcCoreInput::egetdat()
         accore.dll!getCommandNameOrGripSelectionInput()
         accore.dll!CCmdThroat::Run()
         accore.dll!AcApAppImp::internalRun()
         accore.dll!AcApAppImp::run(void)
         acad.exe!CAcadApp::Run(void)
         mfc140u.dll!AfxWinMain(HINSTANCE__ * hInstance, HINSTANCE__ * hPrevInstance, wchar_t * lpCmdLine, int nCmdShow)
         acad.exe!__scrt_common_main_seh()
         kernel32.dll!BaseThreadInitThunk()
         ntdll.dll!RtlUserThreadStart()