c#.NET中开发可用于Web网页的ActiveX控件

一、COM可见及GUID

项目属性 –> 应用程序 –> 程序集信息:

为程序生成一个GUID填写在此处,并勾选“使程序集 COM 可见”

二、修改AssemblyInfo.cs文件:

//添加一行命名空间
using System.Security;
//添加一行标记
[assembly: AllowPartiallyTrustedCallers()]

三、类的实现

1. 标记GUID

[Guid("88E22812-2AFF-4c87-AB0B-D3C650BB9BF8")]
public partial class OcxTest : UserControl
{ }

2. 声明IObjectSafety接口

[ComImport,Guid("CB5BDC81-93C1-11CF-8F20-00805F2CD064")]
[InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
public interface IObjectSafety
{
  [PreserveSig]
  void GetInterfacceSafyOptions(
    int riid,
    out int pdwSupportedOptions,
    out int pdwEnabledOptions);

  [PreserveSig]
  void SetInterfaceSafetyOptions(
    int riid,
    int dwOptionsSetMask,
    int dwEnabledOptions);
}

3.实现IObjectSafety接口

[Guid("88E22812-2AFF-4c87-AB0B-D3C650BB9BF8")]
public partial class OcxTest : UserControl, IObjectSafety
{
    //Other lines

    #region IObjectSafety 成员

    void IObjectSafety.GetInterfacceSafyOptions(int riid, out int pdwSupportedOptions, out int pdwEnabledOptions)
    {
        pdwSupportedOptions = 1;
        pdwEnabledOptions = 2;
    }

    void IObjectSafety.SetInterfaceSafetyOptions(int riid, int dwOptionsSetMask, int dwEnabledOptions)
    {
        throw new NotImplementedException();
    }

    #endregion
}

4.【可选】为注册和注销实现更多操作,注册和注销时会执行如下方法

[Guid("88E22812-2AFF-4c87-AB0B-D3C650BB9BF8")]
public partial class OcxTest : UserControl, IObjectSafety
{
    //Other lines

    ///<summary>
    ///Register the class as a control and set its CodeBase entry
    ///</summary>
    ///<param name="key">The registry key of the control</param>
    [ComRegisterFunction()]
    public static void RegisterClass(string key)
    {
        //
    }

    ///<summary>
    ///Called to unregister the control
    ///</summary>
    ///<param name="key">Tke registry key</param>
    [ComUnregisterFunction()]
    public static void UnregisterClass(string key)
    {
        //
    }
}

四、注册和注销

"C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\regasm.exe" /codebase OcxTest.dll

"C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\regasm.exe" /codebase OcxTest.dll /u

五、调用

<object id="p" border="0" classid="CLSID:88E22812-2AFF-4c87-AB0B-D3C650BB9BF8"
    width="300" height="280">
</object>

结束。

(时间及其仓促,写的很简略,立此存档以备后用)

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