如何访问Winform ActiveX控件在MFC没有CLR [英] How to Access Winform ActiveX Control in MFC No CLR

问题描述

我的专案包含四个项目

1. C＃DLL通过Interop公开COM接口


2. 一个WPF控件，其中包含1中的一个暴露类的实例


3. 一个Winform ActiveX，它使用ElementHost在2中托管WPF控件
对话框应用程序使用控件从3

Winform ActiveX（3）通过在2中的函数暴露类实例1。通过ActiveX从MFC对话框应用程序访问此类实例。我已环顾四周，发现你可以使用CWinFormControl做到这一点。但是我不能自由地使用/ clr重新编译MFC应用程序。因此我不能使用CWinFormControl。

我可以通过COM从MFC应用程序访问类，并运行所有的函数等，但类是一个不同的实例，因为DLL被加载在自己的空间。

ActiveX运行良好，并显示所有WPF数据。

问题是如何获得一个指向ActiveX控件从MFC应用程序中的指针，而不使用CWinFormControl？

我已经尝试从ActiveX导入TLB，并尝试在类向导中为它创建一个变量，但它报告TLB不可用。我也尝试通过手动创建一个变量直接创建一个DDX条目，但DDX不允许指针。

任何想法？

p>对任何对这个问题的答案感兴趣的人都是如何解决它。首先，您必须动态创建ActiveX并将其放置为自己。

在您的MFC对话框标题中添加一个CWnd

  CWnd m_MyActiveX; 
 

在您的MFC Cpp中动态创建控制

  m_MyActiveX.CreateControl（MyActiveX.ProgId，，WS_VISIBLE，prect，this，5000）; 
  

注意：您可以在Winform ActiveX属性中找到progid

  [ProgId（MyActiveX.ProgId）] 
 [ClassInterface（ClassInterfaceType.AutoDispatch）] 
  pre> 
 
 
下一步获取COM对象的IUnknown和QueryInterface您需要
  IOleObjectPtr pOleObj（m_MyActiveX.GetControlUnknown（））; 
 if（pOleObj！= NULL）
 {
 MyCOMObject :: IWpfHostPtr host; 
 pOleObj.QueryInterface（__ uuidof（MyCOMObject :: IWpfHostPtr），& host）; 
 
 MyCOMWPFControl :: IWpfControl wpf; 
 host-> GetWpfControl（& wpf）; 
 
 MyInternalCOMObject :: ICoolObject internal; 
 wpf-> GetInternalObject（& internal）; 
 
 internal-> AndAPartridgeInaPearTree（）; 
} 
  
注意：实际Winform ActiveX必须来自一些已知的接口
  public partial class WpfHost：UserControl，IWpfHost 
  
使用此技术，您成功地在您的传统MFC应用程序上托管WPF控件，并通过COM与他们沟通，而无需使用托管C ++ 
 
My Project Consists of Four Items

C# DLL Which Exposes a COM Interface via Interop
A WPF Control which contains an Instance of an exposed class in 1 
A Winform ActiveX which hosts the WPF control in 2 using ElementHost
An MFC Dialog Application using the Control from 3
The Winform ActiveX (3) exposes the class instance from 1 via a function in 2. I wish to access this class instance from the MFC dialog application through the ActiveX. I have looked around and found you can do this using CWinFormControl. However I am not at liberty to recompile the MFC app using /clr. Therefore I cannot use CWinFormControl. 

I can access the class in 1 via COM from the MFC app and run all the functions etc however the class is a different instance as the DLL is loaded in its own space. 

The ActiveX works well and displays all the WPF data nicely.

So the question is how do I get a pointer to the ActiveX control from within the MFC app without using CWinFormControl? 

I have tried importing the TLB from the ActiveX and attempting to create a "Variable" for it in the Class wizard but it reports that the TLB is unavailable. I have also tried directly creating a DDX entry by manually creating a variable but DDX doesn't allow pointers.

Any ideas?
解决方案
The Question is basically trying to access a Winform ActiveX Control in MFC without having to use clr or managed C++.

For anyone interested in the answer to this question here is how I solved it. First off you have to dynamically create the ActiveX and place it your self.

In Your MFC Dialog header add a CWnd 
   CWnd m_MyActiveX;
In your MFC Cpp dynamically create the Control
   m_MyActiveX.CreateControl("MyActiveX.ProgId","",WS_VISIBLE,prect,this,5000);
NOTE: you can find the progid in your Winform ActiveX attributes
[ProgId("MyActiveX.ProgId")]
[ClassInterface(ClassInterfaceType.AutoDispatch)]  
Next Grab the IUnknown and QueryInterface for the COM Object You need
IOleObjectPtr pOleObj(m_MyActiveX.GetControlUnknown ());
if (pOleObj != NULL) 
{
    MyCOMObject::IWpfHostPtr host;
    pOleObj.QueryInterface(__uuidof(MyCOMObject::IWpfHostPtr),&host);

    MyCOMWPFControl::IWpfControl wpf;
    host->GetWpfControl ( &wpf );

    MyInternalCOMObject::ICoolObject internal;
    wpf->GetInternalObject ( &internal );

    internal->AndAPartridgeInaPearTree ();
 }
NOTE: The Actual Winform ActiveX must derive from some known Interface
public partial class WpfHost : UserControl, IWpfHost 
Using this Technique you successfully host WPF Controls on your Legacy MFC Applications and communicate with them via COM without resorting to Managed C++

                        
这篇关于如何访问Winform ActiveX控件在MFC没有CLR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！