c# ActiveX 控件的開發

關於ActiveX控件的開發,網上很多例子,昨天也整整研究一天才捋順了.

網上大部分例子都是js調用控件的方法,由於要實現在html頁面"相應"控件的事件,整整折騰一天.

關鍵點在於 "創建ActiveX控件" 的 第2,和第7

該技術局限性較大,如瀏覽器端需安裝 .net 框架,僅限於IE瀏覽器.

關於ActiveX的證書及瀏覽器安裝時設置,可參考 http://www.cnblogs.com/weixing/archive/2013/06/28/3161165.html 這也是我看到比較詳細的介紹了.

 

創建ActiveX控件
1.創建一個類庫;
2.項目屬性-應用程序-程序集信息-"使程序集COM可見"勾上;
3.項目屬性-生成-"為COM互操作注冊"勾上.(這個折騰一天,否則注冊事件不可用);
4.創建接口: IObjectSafety (注意GUID不能變);
5.創建ActiveX控件的基類並實現IObjectSafety,ActiveX控件可以繼承它來減少代碼;
6.創建一個ActiveX自定義控件如:ActiveXDemo1;
7.定義ActiveXDemo1的"方法接口"及"事件接口".(如使用自定義事件需用此方式), "事件接口"成員應加上[DispId(x)]標識;
8.創建ActiveX控件完成.

IObjectSafety  接口定義

    [ComImport, Guid("4A359FBB-C9A4-494E-B048-AC068DB4FCB2")] //該GUID不能變
    [InterfaceType(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);
    }
}

ActiveX控件基類(ActiveXControlBase)

    public class ActiveXControlBase : IObjectSafety
    {
        #region IObjectSafety 成員

        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
    }

　　自定義ActiveX控件

    [ComVisible(true)]
    [Guid("684AAD87-C086-4F27-AE55-941A1AAC7212")]
    [InterfaceType(ComInterfaceType.InterfaceIsIDispatch)]
    public interface IThreadDemoEvent
    {
        [DispId(1)] //使用事件,必須加上該標識
        void ShowMessage1(string str_Msg);
        [DispId(2)]
        void ShowMessage2(string str_Msg);
    }

    [ComVisible(true)]
    [Guid("4D12136B-9545-423B-A110-B9405ADF8B30")]
    [InterfaceType(ComInterfaceType.InterfaceIsDual)]
    public interface IThreadDemo
    {
        string StartTimer();
        string StopTimer();
    }

    [Guid("2B4FCB85-A3B7-43BD-B104-7380E7F3483F"),
     ClassInterface(ClassInterfaceType.AutoDual),
     ComDefaultInterface(typeof(IThreadDemo)),
     ComSourceInterfaces(typeof(IThreadDemoEvent)),
     ComVisible(true)
    ]
    public class ActivexThreadDemo : ActiveXControlBase, IThreadDemo
    {
        ~ActivexThreadDemo()
        {
            ShowMessage1("釋放了啊");
        }

        Thread _th;
        bool _isStop;

        public event ShowMessageHandle ShowMessage1;
        public event ShowMessageHandle ShowMessage2;

        void ThreadMethd()
        {
            while (true)
            {
                Thread.Sleep(3000);
                if (ShowMessage1 != null)
                {
                    ShowMessage1.Invoke(DateTime.Now.ToString());
                }
                if (_isStop) break;
            }
            _th.Abort();
            _th = null;
        }

        public string StartTimer()
        {
            if (_th == null)
            {
                _isStop = false;
                _th = new Thread(ThreadMethd);
                _th.IsBackground = false;
                _th.Start();
                return "開起計時";
            }
            if (ShowMessage2 != null)
            {
                ShowMessage2("執行了 StartTimer");
            }
            return "已經開起過計時;";
        }

        public string StopTimer()
        {            
            if (_isStop)
            {                
                return "已經停止計時了!";
            }
            else
            {
                _isStop = true;
                return "停止計時";
            }            
        }
    }

　　

注意:
不能使用泛型委托來聲明事件,如:public event Action<T> ShowMessageHandle;
當類里面包含 static成員,刷新頁面不會清空
跨線程觸發事件: [事件].Invoke(參數1,參數2 ...);

ActiveX控件Setup
1.創建Installer項目;
2.右擊項目 添加->項目輸出 打開添加項目輸出組對話框，並選擇ActiveX控件類庫;
3.主輸出文件的屬性 Register 值為 vsdrpCOM (關鍵),RemovePreviousVersions 設置為true

web頁面測試;
1.創建一個object 標簽,calassid為控件GUID
<object id="ActiveXObj1" classid="clsid:3BCF612C-91CF-4543-83BB-FD2331FDDCB6" ></object>
2.調用控件方法
var r = document.ActiveXObj1.Test1();
3."注冊控件的事件"
<script language="javascript" type="text/javascript" for="ActiveXObj1" event="ShowMessage1(msg)">
alert("ActiveXObj1 ："+ msg )
</script>

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title>ActiveX測試頁面</title>    
    
    <script type="text/javascript">

        function test1() {
            var r = document.ActiveXObj1.Test1();
            window.status = r;
        }

        function StartTimer() {
            alert(document.ActiveThreadEvent);
            var r = document.ActiveThreadEvent.StartTimer();
            window.status = r;
        }
        function StopTimer() {
            var r = document.ActiveThreadEvent.StopTimer();
            window.status = r;
        }
    </script>
    <!--事件的注冊-->
    <script language="javascript" type="text/javascript" for="ActiveXObj1" event="ShowMessage1(msg)">           
        alert("ActiveXObj1 ："+ msg )
    </script>
     <script language="javascript" type="text/javascript" for="ActiveXObj1" event="ShowMessage2(msg)">           
        alert("ActiveXObj1:" + msg)
    </script>

    <!--線程事件注冊-->
    <script language="javascript" type="text/javascript" for="ActiveThreadEvent" event="ShowMessage1(msg)">           
        alert("ActiveThreadEvent ："+ msg )
    </script>
     <script language="javascript" type="text/javascript" for="ActiveThreadEvent" event="ShowMessage2(msg)">           
        alert("ActiveThreadEvent:" + msg)
    </script>
</head>
<body> 
 <object id="ActiveXObj1" classid="clsid:3BCF612C-91CF-4543-83BB-FD2331FDDCB6" ></object>
 <br />
 <object id="ActiveThreadEvent" classid="clsid:2B4FCB85-A3B7-43BD-B104-7380E7F3483F" ></object>
 <br />
  <br />
  <input type="button" value="測試4-相應事件!" onclick="test1();" /><br />
  <input type="button" value="開始計時!" onclick="StartTimer();" /><br />
  <input type="button" value="停止計時!" onclick="StopTimer();" /><br />
  
</body>
</html>

  

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