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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:
1 using System;
2 using System.Collections.Generic;
3 using System.ComponentModel;
4 using System.Drawing;
5 using System.Data;
6 using System.Linq;
7 using System.Text;
8 using System.Threading.Tasks;
9 using System.Windows.Forms;
10 using System.Runtime.InteropServices;
11
12 namespace ActiveX
13 {
14 [Guid("D4176A17-2A33-4903-8F37-9EBDD7CAFFD3")]
15 public partial class UserControl1: UserControl
16 {
17 public UserControl1()
18 {
19 InitializeComponent();
20 }
21
22 private void button1_Click(object sender, EventArgs e)
23 {
24 MessageBox.Show("Hello, GeoStorm!");
25 }
26 }
27 }
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")]
- [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。
2、添加Web页面
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
四、ActiveX控件打包(.cab)与客户端自动安装
VS 2012 C#ActiveX控件开发总结
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原文地址:http://www.cnblogs.com/GeoStorm/p/5420815.html