标签：
ActiveX 控件以前也叫做OLE 控件或OCX 控件，它是一些软件组件或对象，可以将其插入到WEB 网页或其它应用程序中。使用ActiveX 插件，可以轻松方便的在Web 页中插入多媒体效果、交互式对象以及复杂程序等等。通常使用C++或VB 开发ActiveX 控件，本文探讨一下在Visual Studio 2012 环境中使用C#开发ActiveX 控件的技术实现。
一、ActiveX控件的开发
1、新建一个空白的解决方案
2、在解决方案上右击→添加→新建项目→Visual C#→Windows→Windows窗体控件库，输入名称为ActiveX。
点击确定，生成一个名为UserControl1的控件，继承自UserControl类，在上面拖一个按钮，并写入事件响应代码：
3、在新建的ActiveX控件库上右键→属性→应用程序→程序集信息→使程序集COM可见（M）。再切换到“生成”标签→勾选“为COM互操作注册”。
4、修改ActiveX的AssemblyInof.cs文件，添加如下代码：
5、为Control1.cs添加内容
添加命名空间using System.Runtime.InteropServices;
为控件创建GUID：工具→创建GUID，选个5，点击复制！
将GUID号粘贴到ActiveX.cs中，如下：
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Runtime.InteropServices;
namespace ActiveX
{
[Guid("D4176A17-2A33-4903-8F37-9EBDD7CAFFD3")]
public partial class UserControl1: UserControl
{
public UserControl1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
MessageBox.Show("Hello, GeoStorm!");
}
}
}6、为了让ActiveX 控件获取客户端的信任， 控件类还需要实现一个名为“IObjectSafety”的接口。（注意：不能修改该接口的GUID 值）。
创建接口：右键ActiveX 工程—>添加—>新建项→Visual C#项→接口
代码如下：
using System;
using System.Runtime.InteropServices;
namespace ActiveXDemo
{
[ComImport, GuidAttribute("CB5BDC81-93C1-11CF-8F20-00805F2CD064")]//固定不变的
[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);
}
}然后在控件类中集成并实现接口：
using System;
using System.Windows.Forms;
namespace ActiveXTest
{
using System.Runtime.InteropServices;
[Guid("D4176A17-2A33-4903-8F37-9EBDD7CAFFD3"), ProgId("ActiveXDemo.UserControl1"), ComVisible(true)]
public partial class UserControl1: UserControl,IObjectSafety
{
#region IObjectSafety 成员 格式固定
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
public UserControl1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
MessageBox.Show("Hello, GeoStorm");
}
}
}
这样，一个ActiveX控件就开发完了！
二、ActiveX控件的部署
添加打包部署项目（VS2012需要单独安装InstallShield 2015 Limited Edition，并输入序列号），添加主输出，将其Register 属性设置为vsdrpCOM，完成后生成，本过程略过。
三、测试
1、新建web应用：
文件→新建→项目→Visual C#→Web→ASP.NET空Web应用程序→WebApplication1→添加到解决方案。
右键→添加→Web窗体
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="WebApplication1.WebForm1" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title></title>
</head>
<body>
<div>
<object id="ActiveX" classid="clsid:0973CD43-BED3-4468-86E9-B0D2344F54D6" codebase="test.cab"></object>
<input type="button" onclick="alert(ActiveX.ForDefault());" value=" 提交( 前台调用控件方法)" />
</div>
</body>
</html>
3、在IE浏览器中查看效果
标签：
原文地址：http://blog.csdn.net/lucky51222/article/details/51187530
