C#创建activex供js调用

建立vsstudio 工程

点击  新建 -》项目-》window控件库  【名称自己随便取 比如：UserControl1.cs】

首先 建立window 安全接口【为了防止ie浏览器阻止activex】

同时在 -》properties 中的文件AssemblyInfo.cs 文件中添加一行

[assembly: AllowPartiallyTrustedCallers()]   //引入using System.Runtime.InteropServices;

接口名称 IObjectSafety

  [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);      }

 

UserControl1.cs 继承该接口

在类中添加如下代码

  #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

点击visio studio 工具-》创建uuid -》点击copy 

UserControl1.cs  添加注解[Guid("10636708-BF45-4f9b-8882-CAB52B25C48B")]

10636708-BF45-4f9b-8882-CAB52B25C48B  是刚刚copy的内容  copy时有{} 去掉它

比如：

 [Guid("10636708-BF45-4f9b-8882-CAB52B25C48B")]
    public partial class UserControl1 : UserControl,IObjectSafety

点击工程 点击属性   应用程序-》输出类型改为类库，记录下 程序集空间 ，-》点击程序集信息 勾上 使程序集com可见

生成-》勾上 ‘为com Interop 注册’  

现在在UserControl1.cs   加入如下方法

public string showSaveFile(string defaultStr)
        {
            SaveFileDialog d = new SaveFileDialog();
            d.FileName = defaultStr;
            if (d.ShowDialog() == DialogResult.OK)
            {
                this.lblname.Text = d.FileName;
            }
           
            return d.FileName;
        }

再在UserControl1.cs 加几个按钮 文本框啥的

编译  生成了一个dll 文件  将它丢入system32 目录下

在任意目录 建立一个 test.html

让控件在页面上显示 可以在在body中添加

<object classid="clsid:上面生成的uuid" width="300" height="300"/>

在js中调用

<html>
<script>
function init()
{

 var c=new ActiveXObject("FirstActivex.UserControl1");
 var path=c.showSaveFile("c.txt");
}
</script>
<body onload="init()"> 
</body>
</html>

FirstActivex是程序集空间 UserControl1是activex控件名称showSaveFile("c.txt");
是刚刚在c#控件中定义的方法