C# Activex开发、打包、签名、发布

最近有这样一个需求，需要在网页上面启动客户端的软件，软件之间的通信、调用，单单依靠HTML是无法实现了，因此必须借用Activex来实现。由于本人主要擅长C#，自然本文给出了用C#实现的范例，本文的预期效果是有一定Winform基础的人可都轻松读懂本文。

文章主要介绍了以下几个部分：

1、用C#制作Activex控件，并发布为msi安装文件

2、将exe打包为cab，达到浏览器自动安装的效果

3、给cab数字签名（可选）

4、将Activex应用到网页上

二、用C#制作Activex控件，并发布为msi安装文件

1、新建window用户控件项目EasyActivex。其实VS2010并没有提供专门的Activex项目模板，所谓的Activex，只要符合com标准即可。

2）在EasyActivex项目添加IObjectSafety接口

在IObjectSafety接口代码如下，值得注意的是Guid不能随便改，必须为一下代码给出的Guid：

using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;

namespace EasyActivex
{

    [ComImport, GuidAttribute("CB5BDC81-93C1-11CF-8F20-00805F2CD064")]
    [InterfaceTypeAttribute(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);
    }
}

3）在EasyActivex项目添加EUserControl控件，在控件中实现IObjectSafety接口。

在控件上面添加按钮，命名为btnOpenNote

控件的后台代码必须实现IObjectSafety接口

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
namespace EasyActivex
{
    //这个Guid，网页调用的时候用到，Mark
    [Guid("685F0A47-944D-4145-BF4E-76A02A422B02")]
    //这里要实现IObjectSafety接口
    public partial class EUserControl : UserControl, IObjectSafety  
    {
        public EUserControl()
        {
            InitializeComponent();
        }
        #region IObjectSafety  接口成员实现（直接拷贝即可）

        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

        /// <summary>
        /// 打开记事本
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnOpenNote_Click(object sender, EventArgs e)
        {
            System.Diagnostics.Process.Start("notepad.exe"); 
        }
    }
}

小提示：EUserControl代码的Guid可以用VS附带的Guid生成工具生成：

C# Activex开发、打包、签名、发布