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我用 C++/CLI 写了一个类，它继承自System.Windows.Forms.UserControl. 它工作正常，但每当我尝试在设计器视图中查看包含此控件的某个表单时，它会因以下错误而崩溃：

设计师错误

如果我单击“转到代码”，我会被发送到MainForm.Designer.cs，在mConsole我的控件实例添加到表单的行中。有人告诉我它没有声明，但在下面几行就完成了。BeginInit是 new'ing 之后调用的第一个函数mConsole，因此Init在设置所有属性之前调用。一切看起来都在这一端。

控件的 dll 是使用/clr开关构建的，使用它的 Windows 窗体项目具有引用集。它每次都能完美地构建和运行。唯一的问题是设计视图。每次我需要添加一些组件时，我都必须手动编辑设计器文件，这真的很麻烦。

这是我的一些控件的代码：

//Console.h
namespace MConsole {
public ref class MCConsole :    public System::Windows::Forms::UserControl,
                                public System::ComponentModel::ISupportInitialize {
public:
    MCConsole();
    virtual ~MCConsole();
    !MCConsole();
    //Skipping custom properties and methods...
    virtual void BeginInit();
    virtual void EndInit();
protected:
    virtual void OnPaint( System::Windows::Forms::PaintEventArgs ^ pe ) override;
};

//Console.cpp
#include "Console.h"

void MCConsole::Init(){
    if( m_bInitialized )
        return;
    // Initialize native instance
    m_pNativeInstance->Init( (HWND)this->Handle.ToPointer() );
    m_bInitialized = true;
    // Initialize timer
    m_TimerTickHandler = gcnew System::EventHandler( this, &MCConsole::Render );
    m_Timer.Tick += m_TimerTickHandler;
    m_Timer.Interval = Math::Round<float, int>(1000.0f/FRAMES_PER_SECOND);
    m_Timer.Start();
    // Initialize event handlers
    m_MouseWheelHandler = gcnew System::Windows::Forms::MouseEventHandler( this, &MCConsole::MouseWheelHandlerZoom );
    this->MouseWheel += m_MouseWheelHandler;
    m_ResizeHandler = gcnew System::EventHandler( this, &MCConsole::Resize );
    this->SizeChanged += m_ResizeHandler;
    m_MouseDownHandler = gcnew System::Windows::Forms::MouseEventHandler( this, &MCConsole::MouseDownHandler );
    this->MouseDown += m_MouseDownHandler;
    m_MouseLeaveHandler = gcnew System::EventHandler( this, &MCConsole::MouseLeaveHandler );
    this->MouseLeave += m_MouseLeaveHandler;
    m_MouseMoveHandler = gcnew System::Windows::Forms::MouseEventHandler( this, &MCConsole::MouseMoveHandler );
    this->MouseMove += m_MouseMoveHandler;
    m_MouseUpHandler = gcnew System::Windows::Forms::MouseEventHandler( this, &MCConsole::MouseUpHandler );
    this->MouseUp += m_MouseUpHandler;
    m_KeyPressHandler = gcnew System::Windows::Forms::KeyPressEventHandler( this, &MCConsole::KeyPressHandler );
    this->KeyPress += m_KeyPressHandler;
    m_DropHandler = gcnew System::Windows::Forms::DragEventHandler( this, &MCConsole::DropHandler );
    this->DragDrop += m_DropHandler;
    m_VisibleChangedHandler = gcnew System::EventHandler( this, &MCConsole::VisibleChangedHandler );
    this->VisibleChanged += m_VisibleChangedHandler;
    // Initialize layout wrapper
    m_hRegionLayout = gcnew MCLayout( *m_pNativeInstance->getRegionLayout() );
    m_bInitialized = true;
}

void MCConsole::BeginInit(){
    Init();
}

void MCConsole::EndInit(){}

void MCConsole::OnPaint( System::Windows::Forms::PaintEventArgs ^ pe ) {
    System::Windows::Forms::UserControl::OnPaint( pe );
    if( m_bInitialized )
        m_pNativeInstance->Refresh();
}

我错过了什么或搞砸了什么？或者如何调试 Designer 崩溃？

更新：我刚刚尝试启动另一个 Visual Studio 实例并附加到另一个 VS 的进程。我将前者配置为中断各种异常，我注意到当我打开设计视图时，我得到'System.MissingMethodException' 和 Additional information: Attempted to access a missing member。最终导致（点击继续）屏幕截图中的消息。如果我知道缺少哪种方法就好了……

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1 回答 1

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它正在查找 DLL 的旧副本。也许工具箱文件夹有一个旧副本，将其从工具箱中删除并重新添加。也许 GAC 有一个旧副本，如果它在运行时运行良好，则不太可能。

如果找不到，请从 Visual Studio 命令提示符运行 Fuslogvw.exe。记录所有绑定，以便您可以查看 CLR 从何处检索程序集。

于 2012-09-06T17:33:06.793 回答