Question

有一个很复杂的应用程序，有许多.NET和Native DLL Main_App.exe是Windows窗体应用。在其MainForm_Load()中，加载一个Native（ATL）COM DLL类，调用它，在FinalConstruct()加载并通过COM调用另一个.NET dll，并尝试显示一个Form。

public void ShowXXXXDialog()
{
    XXXXDialog dlg = new XXXXDialog();
    dlg.ShowDialog();
}

立即打开和关闭（约100毫秒后）取消结果到目前为止我的观察结果：

如果我在调用MsgBox.Show(".....")之前添加dlg.ShowDialog()，则可以正常使用。
如果我再次拨打dlg.ShowDialog();（两次），第二次就可以了。
如果我们在启动完成后调用ShowXXXXDialog，它可以正常工作。
如果我附加到VS进行调试，它可以正常工作。
如果我将XXXXDialog替换为另一个，相同的行为（因此与XXXXDialog无关）

基于这些观察，我的感觉是，在ShowXXXXDialog()启动期间调用Main_App.exe时，MainForm_Load()尚未完成，似乎某些内容未在.NET中正确初始化表格？
因此，呼叫dlg.ShowDialog()将立即打开和关闭。但是，它可能会完成.NET Forms初始化，因为再次调用dlg.ShowDialog()将适用于第二次调用。（或显示一个msgbox也将解决...见第2点））

我在[{1}}中加了一个断点，但我没有看到任何特别的东西。 callstack：

XXXXDialog.FormClosing()

你可以在其中看到，.NET启动 - ＆gt;原生电话 - ＆gt; .NET lib调用 - ＆gt;打开表单 - ＆gt;关闭表格。

到目前为止，我不知道为什么会这样做，所以我做了一个讨厌的解决方法，使用秒表，测量*** IMMEDIATELY CLOSED -> AnotherNETLib.dll!AnotherNETLib.AnotherNETLibClass.XXXXDialog.XXXXDialog_FormClosing(object sender, System.Windows.Forms.FormClosingEventArgs e) Line 119 C# System.Windows.Forms.dll!System.Windows.Forms.Form.OnFormClosing(System.Windows.Forms.FormClosingEventArgs e) Unknown System.Windows.Forms.dll!System.Windows.Forms.Form.CheckCloseDialog(bool closingOnly) Unknown System.Windows.Forms.dll!System.Windows.Forms.Application.ThreadContext.System.Windows.Forms.UnsafeNativeMethods.IMsoComponent.FContinueMessageLoop(int reason, int pvLoopData, System.Windows.Forms.NativeMethods.MSG[] msgPeeked) Unknown System.Windows.Forms.dll!System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(System.IntPtr dwComponentID, int reason, int pvLoopData) Unknown System.Windows.Forms.dll!System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(int reason, System.Windows.Forms.ApplicationContext context) Unknown System.Windows.Forms.dll!System.Windows.Forms.Application.ThreadContext.RunMessageLoop(int reason, System.Windows.Forms.ApplicationContext context) Unknown System.Windows.Forms.dll!System.Windows.Forms.Application.RunDialog(System.Windows.Forms.Form form) Unknown System.Windows.Forms.dll!System.Windows.Forms.Form.ShowDialog(System.Windows.Forms.IWin32Window owner) Unknown System.Windows.Forms.dll!System.Windows.Forms.Form.ShowDialog() Unknown *** CALLS "dlg.ShowDialog();" -> AnotherNETLib.dll!AnotherNETLib.AnotherNETLibClass.ShowXXXXDialog() Line 719 C# [Native to Managed Transition] [Managed to Native Transition] [Native to Managed Transition] *** CALLS TO A .NET LIB VIA COM -> NativeCOMLib.dll!ATL::CComPtr<IDispatch>::Invoke0(long dispid, tagVARIANT * pvarRet) Line 465 C++ NativeCOMLib.dll!ATL::CComPtr<IDispatch>::Invoke0(const wchar_t * lpszName, tagVARIANT * pvarRet) Line 475 C++ NativeCOMLib.dll!CNativeClass::ShowXXXXDialog() Line 204 C++ NativeCOMLib.dll!CNativeClass::FinalConstruct() Line 130 C++ NativeCOMLib.dll!ATL::CComCreator<ATL::CComObject<CNativeClass> >::CreateInstance(void * pv, const _GUID & riid, void * * ppv) Line 2009 C++ NativeCOMLib.dll!ATL::CComCreator2<ATL::CComCreator<ATL::CComObject<CNativeClass> >,ATL::CComCreator<ATL::CComAggObject<CNativeClass> > >::CreateInstance(void * pv, const _GUID & riid, void * * ppv) Line 2094 C++ NativeCOMLib.dll!ATL::CComClassFactory::CreateInstance(IUnknown * pUnkOuter, const _GUID & riid, void * * ppvObj) Line 3738 C++ [Managed to Native Transition] mscorlib.dll!System.RuntimeType.CreateInstanceSlow(bool publicOnly, bool skipCheckThis, bool fillCache, ref System.Threading.StackCrawlMark stackMark) Line 5430 C# mscorlib.dll!System.Activator.CreateInstance(System.Type type, bool nonPublic) Line 193 C# mscorlib.dll!System.Activator.CreateInstance(System.Type type) Line 134 C# *** CALLS TO NATIVE COM -> Main_AppNET.exe!MainApp.Libs.LoadLib(string id) Line 71 C# Main_AppNET.exe!MainApp.MainForm.MainForm_Load(object sender, System.EventArgs e) Line 654 C# System.Windows.Forms.dll!System.Windows.Forms.Form.OnLoad(System.EventArgs e) Unknown System.Windows.Forms.dll!System.Windows.Forms.Form.OnCreateControl() Unknown System.Windows.Forms.dll!System.Windows.Forms.Control.CreateControl(bool fIgnoreVisible) Unknown System.Windows.Forms.dll!System.Windows.Forms.Control.CreateControl() Unknown System.Windows.Forms.dll!System.Windows.Forms.Control.WmShowWindow(ref System.Windows.Forms.Message m) Unknown System.Windows.Forms.dll!System.Windows.Forms.Control.WndProc(ref System.Windows.Forms.Message m) Unknown System.Windows.Forms.dll!System.Windows.Forms.ScrollableControl.WndProc(ref System.Windows.Forms.Message m) Unknown System.Windows.Forms.dll!System.Windows.Forms.Form.WmShowWindow(ref System.Windows.Forms.Message m) Unknown System.Windows.Forms.dll!System.Windows.Forms.Form.WndProc(ref System.Windows.Forms.Message m) Unknown Main_AppNET.exe!MainApp.MainForm.WndProc(ref System.Windows.Forms.Message m) Line 637 C# System.Windows.Forms.dll!System.Windows.Forms.Control.ControlNativeWindow.OnMessage(ref System.Windows.Forms.Message m) Unknown System.Windows.Forms.dll!System.Windows.Forms.Control.ControlNativeWindow.WndProc(ref System.Windows.Forms.Message m) Unknown System.Windows.Forms.dll!System.Windows.Forms.NativeWindow.Callback(System.IntPtr hWnd, int msg, System.IntPtr wparam, System.IntPtr lparam) Unknown System.Windows.Forms.dll!System.Windows.Forms.NativeWindow.DefWndProc(ref System.Windows.Forms.Message m) Unknown Infragistics2.Win.UltraWinTabbedMdi.v9.2.dll!Infragistics.Win.UltraWinTabbedMdi.MdiParentSubclasser.WndProc(ref System.Windows.Forms.Message m) Unknown System.Windows.Forms.dll!System.Windows.Forms.NativeWindow.Callback(System.IntPtr hWnd, int msg, System.IntPtr wparam, System.IntPtr lparam) Unknown [Native to Managed Transition] user32.dll!_InternalCallWinProc@20() Unknown user32.dll!_UserCallWinProcCheckWow@32() Unknown user32.dll!_SendMessageWorker@24() Unknown user32.dll!_SendMessageW@16() Unknown System.Windows.Forms.ni.dll!7a6190d0() Unknown [Frames below may be incorrect and/or missing, native debugger attempting to walk managed call stack] [Managed to Native Transition] System.Windows.Forms.dll!System.Windows.Forms.Form.SetVisibleCore(bool value) Unknown System.Windows.Forms.dll!System.Windows.Forms.Control.Visible.set(bool value) Unknown System.Windows.Forms.dll!System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(int reason, System.Windows.Forms.ApplicationContext context) Unknown System.Windows.Forms.dll!System.Windows.Forms.Application.ThreadContext.RunMessageLoop(int reason, System.Windows.Forms.ApplicationContext context) Unknown System.Windows.Forms.dll!System.Windows.Forms.Application.Run(System.Windows.Forms.Form mainForm) Unknown ***APP STARTUP -> Main_AppNET.exe!MainApp.Program.Main(string[] args) Line 127 C# [Native to Managed Transition] mscoreei.dll!__CorExeMain@0() Unknown mscoree.dll!_ShellShim__CorExeMain@0() Unknown mscoree.dll!__CorExeMain_Exported@0() Unknown ntdll.dll!___RtlUserThreadStart@8() Unknown ntdll.dll!__RtlUserThreadStart@8() Unknown的时间，如果返回<1秒，我期待上述问题，以及再打一次。它有效...但我很好奇发生了什么事？

表格对话框在显示后立即关闭

0 个答案: