C#开发Activex控件(1)

项目结构

创建Activex步骤：

1.选择创建类别（Windows 控件库或类库）

2.设置对应的com属性

AssemblyInfo.cs中须做以下设置：
a.引入命名空间：using System.Security;
b.[assembly: AllowPartiallyTrustedCallers()]

3.生成的证书能正常在IE下安装，需继承IObjectSafety，考虑到所有的生成的证书都需继承自该接口，需写一个基类，代码如下：
a.接口代码：

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

namespace LamSoonActivex
{
    [ComImport, Guid("CB5BDC81-93C1-11CF-8F20-00805F2CD064")]
    [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    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);
    }
}

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b.基类代码

using System;
using System.Collections.Generic;
using System.Text;

using System.Runtime.InteropServices;
using System.Windows.Forms;

namespace LamSoonActivex
{

    public class BaseActivex : UserControl, IObjectSafety
    {
        private Sunisoft.IrisSkin.SkinEngine skinEngine1;

        #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)
        {
            //pdwSupportedOptions = 1;
            //pdwEnabledOptions = 2;
            //throw new Exception("The method or operation is not implemented.");
            //以上代码亦能正常运行,SetInterfaceSafetyOptions设置即可


            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)
        {
            //throw new Exception("The method or operation is not implemented.");
            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

        private void InitializeComponent()
        {
            this.skinEngine1 = new Sunisoft.IrisSkin.SkinEngine(((System.ComponentModel.Component)(this)));
            this.SuspendLayout();
            // 
            // skinEngine1
            // 
            this.skinEngine1.SerialNumber = "";
            this.skinEngine1.SkinFile = "\\Resources\\SportsBlue.ssk";//null;
            // 
            // BaseActivex
            // 
            this.Name = "BaseActivex";
            this.Load += new System.EventHandler(this.BaseActivex_Load);
            this.ResumeLayout(false);

        }

        private void BaseActivex_Load(object sender, EventArgs e)
        {
            //skinEngine1.SkinFile = LamSoonActivex.Properties.Resources.l.ssk;// @"\Resources\SportsBlue.ssk";
        }
    }
}

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4.证书编码

a.需在证书的[Guid("527A380F-7E26-4fd3-AEA5-010D3E7B73BE")]，是在Web页中调用的Id，必须是唯一
b.须引入命名空间 using System.Runtime.InteropServices;

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 LamSoonActivex
{
    [Guid("527A380F-7E26-4fd3-AEA5-010D3E7B73BE")]
    public partial class FrmLamSoon : BaseActivex
    {
        public FrmLamSoon()
        {
            InitializeComponent();
        }

        private void btnLogin_Click(object sender, EventArgs e)
        {
            if (txtStaff_Id.Text.Length == 0 || txtPwd.Text.Length == 0)
            {
                MessageBox.Show("请输入有效的系统登陆信息！", "系统提示", MessageBoxButtons.OK, MessageBoxIcon.Error);
                return;
            }
        }
    }
}

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5.Web UI调用

2种调用方式：

<object id="helloworld" 
            classid="clsid:527A380F-7E26-4fd3-AEA5-010D3E7B73BE" 
            codebase="LamSoonActivex.exe">
        </object>

<object id="helloworld" 
            classid="clsid:527A380F-7E26-4fd3-AEA5-010D3E7B73BE" 
            codebase="LamSoonActivex.cab#version=1,0,1,0">
        </object>

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 示例：

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>TestActivex</title>
</head>
<body>
    <form id="form1" runat="server">
    <div style=" text-align:center">
        
        <object id="activex_test" 
            classid="clsid:527A380F-7E26-4fd3-AEA5-010D3E7B73BE" 
            codebase="LamSoonActivex.cab#version=1,0,1,0">
        </object>
        
    </div>
    </form>
</body>
</html>

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