昨天写了篇博客《Winform 程序嵌入WPF程序 并发送消息》,没有说明为什么要嵌入WPF程序,那么今天就来唠叨唠叨其中的一个使用场景,开发ActiveX控件
首先,新建一个类库工程HuaYun.ActiveX,右键工程属性,在“应用程序”页,点击“程序集信息”按钮,在弹出的窗体里勾选“使程序集COM可见”,具体操作如下图
第二步,切换到“生成”的选项卡,勾选“为COM互操作注册”,如下图
第三步,在AssemblyInfo.cs里添加[assembly: AllowPartiallyTrustedCallers()],需要引用using System.Security;命名控件
第四步,添加一个IObjectSafety的接口,这个接口主要是在浏览器中提高控件的可信任度
using System; using System.Collections.Generic; using System.Linq; using System.Runtime.InteropServices; using System.Text; namespace HuaYun.ActiveX { [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); } }
第五步,添加一个用户控件ActiveXControl.cs,并让这个控件实现上面的IObjectSafety接口,同事在这个控件的类中加上一个Guid的特性,如:[Guid("21209360-34E1-423E-A81F-BC80B62021B7")],注意,后面在html页面中要根据这个Guid注册控件的,看看ActiveXControl.cs里的内容
using System; using System.Collections.Generic; using System.ComponentModel; using System.Drawing; using System.Data; using System.Linq; using System.Text; using System.Windows.Forms; using System.Runtime.InteropServices; namespace HuaYun.ActiveX { [Guid("21209360-34E1-423E-A81F-BC80B62021B7")] public partial class ActiveXControl : UserControl, IObjectSafety { public ActiveXControl() { InitializeComponent(); } #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) { 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 } }
到这一步,ActiveX控件基本上是开发完成了,可以呈现了,新建个Html页面,在页面上加入下面一行代码,生成ActiveX控件的解决方案,注意:后面每次生成的时候都要关闭在页面中有用到这个控件的页面,不然会占这进程,生成不了
<object id="activex" classid="clsid:21209360-34E1-423E-A81F-BC80B62021B7" codebase="lib/setup.exe" width="100%" height="200"></object>
其中classid就是上面的ActiveXControl类里加的Guid的特性里的Guid值,codebase是后面打包成安装文件放在站点目录里的安装文件,浏览引用控件的页面看看页面效果,
PS:ActiveX只能在IE内核的浏览器中运行,具体原因请百度脑补了,控件里的按钮点击事件跟winform的是一样的
下面说下在ActiveX控件里注册回调的js函数,引用Microsoft.mshtml程序集,在ActiveXControl.cs里加入以下代码
#region 注册回调函数 private IHTMLWindow2 temphtml = null; private string functionstr = ""; public void RegJs(object win, string fuc) { temphtml = (IHTMLWindow2)win; if (temphtml != null && !string.IsNullOrEmpty(fuc)) { functionstr = fuc; } else { temphtml = null; functionstr = ""; MessageBox.Show("注册脚本失败!"); } } #endregion
再个上面那个ActiveX控件里的“我是ActiveX控件”加个点击事件,在点击这个按钮的时候执行页面注册的js函数
private void btn_Click(object sender, EventArgs e) { // 执行script脚本 temphtml.execScript(functionstr + "()", "JScript"); }
好了,给上面的调用ActiveX控件加几个js函数,就可以运行了
<head> <title></title> <script type="text/javascript"> function load() { var dom = document.getElementById("activex"); dom.regJs(window, ‘test‘); } function test() { alert("向ActiveX控件注册回调函数"); } </script> </head> <body onload="load()"> <object id="activex" classid="clsid:21209360-34E1-423E-A81F-BC80B62021B7" codebase="lib/setup.exe" width="100%" height="200"></object> </body>
运行这个页面,点击里面的按钮,调用注册的函数
再来说下给ActiveX控件加初始化方法,并传参,也是很简单,在上面的ActiveXControl类里加入初始化方法
#region 控件初始化方法 public void Init(string message) { MessageBox.Show(message); } #endregion
生成HuaYun.ActiveX工程,在调用的页面加入初始化方法
<script type="text/javascript"> function load() { var dom = document.getElementById("activex"); dom.regJs(window, ‘test‘); dom.Init(‘ActiveX控件初始化...‘); } function test() { alert("向ActiveX控件注册回调函数"); } </script>
运行页面,页面加载就会弹出“ActiveX控件初始化...”
好了,ActiveX控件的开发步骤就介绍到这里,使用场景也因项目而异i,说下我的使用。我是在ActiveX控件里嵌入WPF程序(WPF能作出酷炫屌炸天的效果)来使用的,至于怎么嵌入可以看我上一篇博客,这里给张飞机票链接过去《Winform 程序嵌入WPF程序 并发送消息》