C#编写activeX控件与js相互调用

时间：2022-05-17 09:10:41

控件代码(项目->生成:勾选为COM互操作注册)：

    [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);
    }

public delegate void MessageHander(string msg);
    [ComVisible(true)]//这个不能少
    [Guid("C37124B1-8013-44C1-B8B4-9672B2AA175F")]
    [InterfaceType(ComInterfaceType.InterfaceIsIDispatch)]
    public interface IActiveXEvents
    {
        [DispId(0x60020000)]
        void PlayGame(string msg);//提供给javascript绑定
    }
[ComVisible(true)]
    [Guid("FCB41AEE-C75C-4FFA-89E7-A53E6F6F8365")]
    [ClassInterface(ClassInterfaceType.None)]
    [ProgId("TransFileClientLib.TransFileCtrl")]
    [ComSourceInterfaces(typeof(IActiveXEvents))]
    public partial class TransFileCtrl : UserControl, IObjectSafety
    {
        public event MessageHander PlayGame;  
 #region IObjectSafety Members
        public int GetInterfaceSafetyOptions(ref Guid riid, ref int pdwSupportedOptions, ref int pdwEnabledOptions)
        {
            pdwSupportedOptions = 1;
            pdwEnabledOptions = 2;
            return 0;
        }

        public int SetInterfaceSafetyOptions(ref Guid riid, int dwOptionSetMask, int dwEnabledOptions)
        {
            return 0;
        }
        #endregion

 private void btnInvokeJs_Click(object sender, EventArgs e)
        {
            if (this.PlayGame != null)
            {
                PlayGame("成功!");
            }
            else
            {
                WinUtils.FailMsg("调用失败!");
            }
        }

public void SayHello(){
    MessageBox.show("hello!");
}
前台代码: 

<head>
<script type="text/javascript">
    window.onload = function () {
        var transFileCtrl = document.getElementById("transFileCtrl");
        transFileCtrl.SayHello();
    }


    window.onbeforeunload = function () {
        //alert("close");
    }
</script>
<script type="text/javascript" for="transFileCtrl" event="PlayGame(msg)">
alert(msg);
</script>
</head>
<body>
<object id="transFileCtrl" width="390" height="374"
         classid="clsid:FCB41AEE-C75C-4FFA-89E7-A53E6F6F8365"
         VIEWASTEXT style="font-size:9pt;width:387px;height:384px;">
</object>
</body>



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