標籤:
ActiveX 控制項以前也叫做OLE 控制項或OCX 控制項,它是一些軟體組件或對象,可以將其插入到WEB 網頁或其它應用程式中。使用ActiveX 外掛程式,可以輕鬆方便的在Web 頁中插入多媒體效果、互動式對象以及複雜程式等等。通常使用C++或VB 開發ActiveX 控制項,本文探討一下在Visual Studio 2012 環境中使用C#開發ActiveX 控制項的技術實現。
一、ActiveX控制項的開發
1、建立一個空白的解決方案
2、在解決方案上右擊→添加→建立項目→Visual C#→Windows→Windows表單控制項陳列庫,輸入名稱為ActiveX。
點擊確定,產生一個名為UserControl1的控制項,繼承自UserControl類,在上面拖一個按鈕,並寫入事件響應代碼:
3、在建立的ActiveX控制項陳列庫上右鍵→屬性→應用程式→程式集資訊→使程式集COM可見(M)。再切換到“產生”標籤→勾選“為COM互操作註冊”。
4、修改ActiveX的AssemblyInof.cs檔案,添加如下代碼:
5、為Control1.cs新增內容
添加命名空間using System.Runtime.InteropServices;
為控制項建立GUID:工具→建立GUID,選個5,點擊複製!
將GUID號粘貼到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、為了讓ActiveX 控制項擷取用戶端的信任, 控制項類還需要實現一個名為“IObjectSafety”的介面。(注意:不能修改該介面的GUID 值)。
建立介面:右鍵ActiveX 工程—>添加—>建立項→Visual C#項→介面
代碼如下:
using System;using System.Runtime.InteropServices;namespace ActiveXDemo{ [ComImport, GuidAttribute("CB5BDC81-93C1-11CF-8F20-00805F2CD064")]//固定不變的 [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); }}
然後在控制項類中整合並實現介面:
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 成員 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"); } }}
這樣,一個ActiveX控制項就開發完了!
二、ActiveX控制項的部署
添加打包部署項目(VS2012需要單獨安裝InstallShield 2015 Limited Edition,並輸入序號),添加主輸出,將其Register 屬性設定為vsdrpCOM,完成後產生,本過程略過。
三、測試
1、建立web應用:
檔案→建立→項目→Visual C#→Web→ASP.NET空Web應用程式→WebApplication1→添加到解決方案。
2、添加Web頁面
右鍵→添加→Web表單
<%@ 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( 前台調用控制項方法)" /> </div></body></html>
3、在IE瀏覽器中查看效果
四、ActiveX控制項打包(.cab)與用戶端自動安裝
VS 2012 C#ActiveX控制項開發總結