史上最全的ActiveX开发教程-开发篇(.NET)

开发环境：Win7、VS2010

1. 创建类

2. 设置工程属性

2.1.  在应用程序页中，打开 程序集信息 ,勾选 使程序集COM可见

2.2.  在 生成 页中， 勾选 为COM互操作注册

**　　**2.3. 在 Properties.AssemblyInfo.cs文件中 添加 `[assembly:AllowPartiallyTrustedCallers()]`（注意引入：`System.Security`命名空间）

3. 添加用户控件

ActiveX以用户控件为载体，加载到网页中

4. 添加控件的GUID

ActiveX的用户控件均有一个独立的GUID标识，该GUID必须与工程的GUID不同。

4.1. 通过VS2010->工具->创建GUID

4.2. 引入`System.Runtime.InteropServices`
4.3. 将生成的GUID粘贴到用户控件类声明前

[Guid("4D39585B-7947-4197-8BDB-B0A6918B1098")]
 public partial class ATC : UserControl
 {
    InitializeComponent();
 }

5. 开发IObjectSafety接口

为了让ActiveX控件获得客户端的信任，用户控件必须实现`IObjectSafety`接口，并且下面的代码是固定的（GUID也不能变）

[ComImport, Guid("CB5BDC81-93C1-11CF-8F20-00805F2CD064")]
[InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
public interface IObjectSafety
{
　　[PreserveSig]
    int GetInterfaceSafetyOptions(ref Guid riid, [MarshalAs(UnmanagedType.U4)] ref int pdwSupportedOptions, [MarshalAs(UnmanagedType.U4)] ref int pdwEnabledOptions);
  
    [PreserveSig()]
    int SetInterfaceSafetyOptions(ref Guid riid, [MarshalAs(UnmanagedType.U4)] int dwOptionSetMask, [MarshalAs(UnmanagedType.U4)] int dwEnabledOptions);
}

6. 用户控件实现IObjectSafety接口

[Guid("4D39585B-7947-4197-8BDB-B0A6918B1098")]
 public partial class ATC : UserControl, IObjectSafety
 {
    InitializeComponent();
 }

 #region IObjectSafety 成员
 
 private const string _IID_IDispatch = "{00020400-0000-0000-C000-000000000046}";
 private const string _IID_IDispatchEx = "{a6ef9860-c720-11d0-9337-00a0c90dcaa9}";
 private const string _IID_IPersistStorage = "{0000010A-0000-0000-C000-000000000046}";
 private const string _IID_IPersistStream = "{00000109-0000-0000-C000-000000000046}";
 private const string _IID_IPersistPropertyBag = "{37D84F60-42CB-11CE-8135-00AA004BB851}";
 
 private const int INTERFACESAFE_FOR_UNTRUSTED_CALLER = 0x00000001;
 private const int INTERFACESAFE_FOR_UNTRUSTED_DATA = 0x00000002;
 private const int S_OK = 0;
 private const int E_FAIL = unchecked((int)0x80004005);
 private const int E_NOINTERFACE = unchecked((int)0x80004002);
 
 private bool _fSafeForScripting = true;
 private bool _fSafeForInitializing = true;
 
 
 public int GetInterfaceSafetyOptions(ref Guid riid, ref int pdwSupportedOptions, ref int pdwEnabledOptions)
 {
     int Rslt = E_FAIL;
 
    string strGUID = riid.ToString("B");
    pdwSupportedOptions = INTERFACESAFE_FOR_UNTRUSTED_CALLER | INTERFACESAFE_FOR_UNTRUSTED_DATA;
    switch (strGUID)
    {
        case _IID_IDispatch:
        case _IID_IDispatchEx:
            Rslt = S_OK;
            pdwEnabledOptions = 0;
            if (_fSafeForScripting == true)
                pdwEnabledOptions = INTERFACESAFE_FOR_UNTRUSTED_CALLER;
            break;
        case _IID_IPersistStorage:
        case _IID_IPersistStream:
        case _IID_IPersistPropertyBag:
            Rslt = S_OK;
            pdwEnabledOptions = 0;
            if (_fSafeForInitializing == true)
               pdwEnabledOptions = INTERFACESAFE_FOR_UNTRUSTED_DATA;
            break;
        default:
             Rslt = E_NOINTERFACE;
            break;
    }

    return Rslt;
 }
 
 public int SetInterfaceSafetyOptions(ref Guid riid, int dwOptionSetMask, int dwEnabledOptions)
 {
    int Rslt = E_FAIL;

    string strGUID = riid.ToString("B");
    switch (strGUID)
    {
        case _IID_IDispatch:
        case _IID_IDispatchEx:
            if (((dwEnabledOptions & dwOptionSetMask) == INTERFACESAFE_FOR_UNTRUSTED_CALLER) &&
                   (_fSafeForScripting == true))
                Rslt = S_OK;
            break;
        case _IID_IPersistStorage:
        case _IID_IPersistStream:
        case _IID_IPersistPropertyBag:
            if (((dwEnabledOptions & dwOptionSetMask) == INTERFACESAFE_FOR_UNTRUSTED_DATA) &&
                    (_fSafeForInitializing == true))
                Rslt = S_OK;
            break;
        default:
            Rslt = E_NOINTERFACE;
            break;
    }
 
    return Rslt;
 }
 
 #endregion

7. 获取ActiveX的Classid

7.1. 打开VS2010->工具->OleView(若没有就自行添加，程序路径：C:\Program Files\Microsoft SDKs\Windows\v7.0A\bin\OleView.exe)。
7.2. 在`Object Classes`->`Grouped by Component Category`->`.NET Category`找到刚才新建的ActiveX控件
7.3. 右键复制HTML标签

8. 页面引用ActiveX控件

在html页面上

<object classid="clsid:ActiveX控件的clsid" codebase="控件打包后的exe文件名或cab文件名" width="200px" height="200px">
</object>

作者：^_^肥仔John

**原文地址：**http://www.cnblogs.com/fsjohnhuang/p/3823102.html