c# Webbrowsercontrol与代理和调用从Javascript到c#

本文关键字：Javascript 调用 Webbrowsercontrol 代理 | 更新日期: 2023-09-27 18:15:14

我结合了webbrowsercontrol ObjectForScripting(源)的功能，从javascript调用c#函数，并为该webbrowser控件(源)提供代理。

每个函数各自工作。但是当我把它们结合起来时，javascript的调用不再工作了。Errormessage is

对象不支持"Test"属性或方法

示例的源代码在底部。

您可以在Form1_Load

中注释和取消注释此块时尝试这两个功能。
// Comment this block for Callback working
object obj = webBrowser1.ActiveXInstance;
IOleObject oc = obj as IOleObject;
oc.SetClientSite(Proxy as IOleClientSite);

我猜问题是接口IServiceProvider的功能QueryService。我试图用Scriptmanager的GUID来确定它，但没有找到解决方案。

using System;
using System.Runtime.InteropServices;
using System.Windows.Forms;
namespace ProxyTest
{
public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
    }
    proxy Proxy = new proxy();
    private void Form1_Load(object sender, EventArgs e)
    {
        webBrowser1.Navigate("about:blank");
        // Comment this block for Callback working
        object obj = webBrowser1.ActiveXInstance;
        IOleObject oc = obj as IOleObject;
        oc.SetClientSite(Proxy as IOleClientSite);
        //Proxy settings are not necessary
        Proxy._currentUsername = ""; // Username
        Proxy._currentPassword = ""; // Password
        Proxy.SetProxyServer(""); //IP:PORT
        webBrowser1.ObjectForScripting = new Scriptmanager();
        Application.DoEvents();
        webBrowser1.DocumentText =
        "<html><head><script>" +
        "function test(message) { alert(message); }" +
        "</script></head><body><button " +
        "onclick='"window.external.Test('called from script code')'">" +
        "call client code from script code</button>" +
        "</body></html>";
    }
}
[ComVisible(true)]
public class Scriptmanager
{
    public void Test(string text)
    {
        MessageBox.Show(text);
    }
}

public class proxy : IOleClientSite, IServiceProvider, IAuthenticate
{
    [DllImport("wininet.dll", SetLastError = true)]
    private static extern bool InternetSetOption(IntPtr hInternet, int dwOption,
        IntPtr lpBuffer, int lpdwBufferLength);
    private Guid IID_IAuthenticate = new Guid("79eac9d0-baf9-11ce-8c82-00aa004ba90b");
    private const int INET_E_DEFAULT_ACTION = unchecked((int)0x800C0011);
    private const int S_OK = unchecked((int)0x00000000);
    private const int INTERNET_OPTION_PROXY = 38;
    private const int INTERNET_OPEN_TYPE_DIRECT = 1;
    private const int INTERNET_OPEN_TYPE_PROXY = 3;
    internal string _currentUsername;
    internal string _currentPassword;

    internal void SetProxyServer(string proxy)
    {
        //Create structure
        INTERNET_PROXY_INFO proxyInfo = new INTERNET_PROXY_INFO();
        if (proxy == null)
        {
            proxyInfo.dwAccessType = INTERNET_OPEN_TYPE_DIRECT;
        }
        else
        {
            proxyInfo.dwAccessType = INTERNET_OPEN_TYPE_PROXY;
            proxyInfo.proxy = Marshal.StringToHGlobalAnsi(proxy);
            proxyInfo.proxyBypass = Marshal.StringToHGlobalAnsi("local");
        }
        // Allocate memory
        IntPtr proxyInfoPtr = Marshal.AllocCoTaskMem(Marshal.SizeOf(proxyInfo));
        // Convert structure to IntPtr
        Marshal.StructureToPtr(proxyInfo, proxyInfoPtr, true);
        bool returnValue = InternetSetOption(IntPtr.Zero, INTERNET_OPTION_PROXY,
            proxyInfoPtr, Marshal.SizeOf(proxyInfo));
    }
    #region IOleClientSite Members
    public void SaveObject()
    {
        // TODO:  Add Form1.SaveObject implementation
    }
    public void GetMoniker(uint dwAssign, uint dwWhichMoniker, object ppmk)
    {
        // TODO:  Add Form1.GetMoniker implementation
    }
    public void GetContainer(object ppContainer)
    {
        ppContainer = this;
    }
    public void ShowObject()
    {
        // TODO:  Add Form1.ShowObject implementation
    }
    public void OnShowWindow(bool fShow)
    {
        // TODO:  Add Form1.OnShowWindow implementation
    }
    public void RequestNewObjectLayout()
    {
        // TODO:  Add Form1.RequestNewObjectLayout implementation
    }
    #endregion
    #region IServiceProvider Members
    public int QueryService(ref Guid guidService, ref Guid riid, out IntPtr ppvObject)
    {
        int nRet = guidService.CompareTo(IID_IAuthenticate);
        if (nRet == 0)
        {
            nRet = riid.CompareTo(IID_IAuthenticate);
            if (nRet == 0)
            {
                ppvObject = Marshal.GetComInterfaceForObject(this, typeof(IAuthenticate));
                return S_OK;
            }
        }
        ppvObject = new IntPtr();
        return INET_E_DEFAULT_ACTION;
    }
    #endregion
    #region IAuthenticate Members
    public int Authenticate(ref IntPtr phwnd, ref IntPtr pszUsername, ref IntPtr pszPassword)
    {
        IntPtr sUser = Marshal.StringToCoTaskMemAuto(_currentUsername);
        IntPtr sPassword = Marshal.StringToCoTaskMemAuto(_currentPassword);
        pszUsername = sUser;
        pszPassword = sPassword;
        return S_OK;
    }
    #endregion
}
public struct INTERNET_PROXY_INFO
{
    public int dwAccessType;
    public IntPtr proxy;
    public IntPtr proxyBypass;
}
#region COM Interfaces
[ComImport, Guid("00000112-0000-0000-C000-000000000046"),
InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
public interface IOleObject
{
    void SetClientSite(IOleClientSite pClientSite);
    void GetClientSite(IOleClientSite ppClientSite);
    void SetHostNames(object szContainerApp, object szContainerObj);
    void Close(uint dwSaveOption);
    void SetMoniker(uint dwWhichMoniker, object pmk);
    void GetMoniker(uint dwAssign, uint dwWhichMoniker, object ppmk);
    void InitFromData(IDataObject pDataObject, bool
        fCreation, uint dwReserved);
    void GetClipboardData(uint dwReserved, IDataObject ppDataObject);
    void DoVerb(uint iVerb, uint lpmsg, object pActiveSite,
        uint lindex, uint hwndParent, uint lprcPosRect);
    void EnumVerbs(object ppEnumOleVerb);
    void Update();
    void IsUpToDate();
    void GetUserClassID(uint pClsid);
    void GetUserType(uint dwFormOfType, uint pszUserType);
    void SetExtent(uint dwDrawAspect, uint psizel);
    void GetExtent(uint dwDrawAspect, uint psizel);
    void Advise(object pAdvSink, uint pdwConnection);
    void Unadvise(uint dwConnection);
    void EnumAdvise(object ppenumAdvise);
    void GetMiscStatus(uint dwAspect, uint pdwStatus);
    void SetColorScheme(object pLogpal);
}
[ComImport, Guid("00000118-0000-0000-C000-000000000046"),
InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
public interface IOleClientSite
{
    void SaveObject();
    void GetMoniker(uint dwAssign, uint dwWhichMoniker, object ppmk);
    void GetContainer(object ppContainer);
    void ShowObject();
    void OnShowWindow(bool fShow);
    void RequestNewObjectLayout();
}
[ComImport, GuidAttribute("6d5140c1-7436-11ce-8034-00aa006009fa"),
InterfaceTypeAttribute(ComInterfaceType.InterfaceIsIUnknown),
ComVisible(false)]
public interface IServiceProvider
{
    [return: MarshalAs(UnmanagedType.I4)]
    [PreserveSig]
    int QueryService(ref Guid guidService, ref Guid riid, out IntPtr ppvObject);
}
[ComImport, GuidAttribute("79EAC9D0-BAF9-11CE-8C82-00AA004BA90B"),
InterfaceTypeAttribute(ComInterfaceType.InterfaceIsIUnknown),
ComVisible(false)]
public interface IAuthenticate
{
    [return: MarshalAs(UnmanagedType.I4)]
    [PreserveSig]
    int Authenticate(ref IntPtr phwnd, ref IntPtr pszUsername, ref IntPtr pszPassword);
}
#endregion
}

更新01.11.2016 盛江的这个建议真的很好。我差不多有一个可行的例子了。单击后显示消息框。不幸的是，之后会出现InvalidVariant异常。有人能猜出是怎么回事吗?我又卡住了。下面是当前代码:

using System;
using System.Runtime.InteropServices;
using System.Windows.Forms;

namespace ProxyTest
{
public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
    }
    proxy Proxy = new proxy();
    private void Form1_Load(object sender, EventArgs e)
    {
        webBrowser1.Navigate("about:blank");
        // Comment this block for Callback working
        object obj = webBrowser1.ActiveXInstance;
        IOleObject oc = obj as IOleObject;
        oc.SetClientSite(Proxy as IOleClientSite);
        //Proxy settings are not necessary
        Proxy._currentUsername = ""; // Username
        Proxy._currentPassword = ""; // Password
        Proxy.SetProxyServer(""); //IP:PORT

        webBrowser1.ObjectForScripting = new Scriptmanager();
        Application.DoEvents();
        webBrowser1.DocumentText =
        "<html><head><script>" +
        "function test(message) { alert(message); }" +
        "</script></head><body><button " +
        "onclick='"window.external.Test('called from script code')'">" +
        "call client code from script code</button>" +
        "</body></html>";
    }
}
[ComVisible(true)]
[InterfaceType(ComInterfaceType.InterfaceIsIDispatch)]
public interface IScriptmanager
{
    void Test(string text);
}
[ComVisible(true)]
public class Scriptmanager : IScriptmanager
{
    public void Test(string text)
    {
        MessageBox.Show(text);
    }
}

public class proxy : IOleClientSite, IServiceProvider, IAuthenticate, IDocHostUIHandler
{
    [DllImport("wininet.dll", SetLastError = true)]
    private static extern bool InternetSetOption(IntPtr hInternet, int dwOption,
        IntPtr lpBuffer, int lpdwBufferLength);
    private Guid IID_IAuthenticate = new Guid("79eac9d0-baf9-11ce-8c82-00aa004ba90b");
    private const int INET_E_DEFAULT_ACTION = unchecked((int)0x800C0011);
    private const int S_OK = unchecked((int)0x00000000);
    private const int INTERNET_OPTION_PROXY = 38;
    private const int INTERNET_OPEN_TYPE_DIRECT = 1;
    private const int INTERNET_OPEN_TYPE_PROXY = 3;
    internal string _currentUsername;
    internal string _currentPassword;
    IDocHostUIHandler _baseIDocHostUIHandler;
    internal void SetProxyServer(string proxy)
    {
        //Create structure
        INTERNET_PROXY_INFO proxyInfo = new INTERNET_PROXY_INFO();
        if (proxy == null)
        {
            proxyInfo.dwAccessType = INTERNET_OPEN_TYPE_DIRECT;
        }
        else
        {
            proxyInfo.dwAccessType = INTERNET_OPEN_TYPE_PROXY;
            proxyInfo.proxy = Marshal.StringToHGlobalAnsi(proxy);
            proxyInfo.proxyBypass = Marshal.StringToHGlobalAnsi("local");
        }
        // Allocate memory
        IntPtr proxyInfoPtr = Marshal.AllocCoTaskMem(Marshal.SizeOf(proxyInfo));
        // Convert structure to IntPtr
        Marshal.StructureToPtr(proxyInfo, proxyInfoPtr, true);
        bool returnValue = InternetSetOption(IntPtr.Zero, INTERNET_OPTION_PROXY,
            proxyInfoPtr, Marshal.SizeOf(proxyInfo));
    }
    #region IOleClientSite Members
    public void SaveObject()
    {
        // TODO:  Add Form1.SaveObject implementation
    }
    public void GetMoniker(uint dwAssign, uint dwWhichMoniker, object ppmk)
    {
        // TODO:  Add Form1.GetMoniker implementation
    }
    public void GetContainer(object ppContainer)
    {
        ppContainer = this;
    }
    public void ShowObject()
    {
        // TODO:  Add Form1.ShowObject implementation
    }
    public void OnShowWindow(bool fShow)
    {
        // TODO:  Add Form1.OnShowWindow implementation
    }
    public void RequestNewObjectLayout()
    {
        // TODO:  Add Form1.RequestNewObjectLayout implementation
    }
    #endregion
    #region IServiceProvider Members
    public int QueryService(ref Guid guidService, ref Guid riid, out IntPtr ppvObject)
    {
        int nRet = guidService.CompareTo(IID_IAuthenticate);
        if (nRet == 0)
        {
            nRet = riid.CompareTo(IID_IAuthenticate);
            if (nRet == 0)
            {
                ppvObject = Marshal.GetComInterfaceForObject(this, typeof(IAuthenticate));
                return S_OK;
            }
        }
        ppvObject = new IntPtr();
        return INET_E_DEFAULT_ACTION;
    }
    #endregion
    #region IAuthenticate Members
    public int Authenticate(ref IntPtr phwnd, ref IntPtr pszUsername, ref IntPtr pszPassword)
    {
        IntPtr sUser = Marshal.StringToCoTaskMemAuto(_currentUsername);
        IntPtr sPassword = Marshal.StringToCoTaskMemAuto(_currentPassword);
        pszUsername = sUser;
        pszPassword = sPassword;
        return S_OK;
    }
    #endregion
    #region IDocHostUIHandler Members
    public uint ShowContextMenu(uint dwID, ref tagPOINT ppt, [MarshalAs(UnmanagedType.IUnknown)] object pcmdtReserved, [MarshalAs(UnmanagedType.IDispatch)] object pdispReserved)
    {
        const int MenuNotHandled = 1;
        return MenuNotHandled;
    }
    public void GetHostInfo(ref DOCHOSTUIINFO pInfo)
    {
        // turn three flags on
        pInfo.dwFlags |= (uint)(DOCHOSTUIFLAG.DOCHOSTUIFLAG_SCROLL_NO |
         DOCHOSTUIFLAG.DOCHOSTUIFLAG_NO3DBORDER |
          DOCHOSTUIFLAG.DOCHOSTUIFLAG_DISABLE_SCRIPT_INACTIVE);
    }
    public void ShowUI(uint dwID, ref object pActiveObject, ref object pCommandTarget, ref object pFrame, ref object pDoc)
    {
        //throw new NotImplementedException();
    }
    public void HideUI()
    {
       // throw new NotImplementedException();
    }
    public void UpdateUI()
    {
       // throw new NotImplementedException();
    }
    public void EnableModeless(int fEnable)
    {
        //throw new NotImplementedException();
    }
    public void OnDocWindowActivate(int fActivate)
    {
        //throw new NotImplementedException();
    }
    public void OnFrameWindowActivate(int fActivate)
    {
        //throw new NotImplementedException();
    }
    public void ResizeBorder(ref tagRECT prcBorder, int pUIWindow, int fFrameWindow)
    {
        //throw new NotImplementedException();
    }
    public uint TranslateAccelerator(ref tagMSG lpMsg, ref Guid pguidCmdGroup, uint nCmdID)
    {
        const int KillAccelerator = 0;
        const int AllowAccelerator = 1;
        const int WM_KEYDOWN = 0x0100;
        if (lpMsg.message != WM_KEYDOWN)
            // allow message
            return AllowAccelerator;
        if ((Control.ModifierKeys & Keys.Control) != Keys.Control)
            return AllowAccelerator;
        // disable the Ctrl-N and Ctrl-P accelerators
        lpMsg.wParam &= 0xFF; // get the virtual keycode
        if ((lpMsg.wParam == 'N') || ((lpMsg.wParam == 'P')))
            return KillAccelerator;
        // allow everything else
        return AllowAccelerator;
    }
    public void GetOptionKeyPath([MarshalAs(UnmanagedType.BStr)] ref string pchKey, uint dw)
    {
       // throw new NotImplementedException();
    }
    public uint GetDropTarget(int pDropTarget, ref int ppDropTarget)
    {
        const int S_OK = 0;
        return S_OK;
    }
    //public object GetDropTarget(ref object pDropTarget)
    //{
    //    return pDropTarget;
    //}
    public void GetExternal([MarshalAs(UnmanagedType.IDispatch)] out object ppDispatch)
    {
        ppDispatch = new Scriptmanager();
    }
    public uint TranslateUrl(uint dwTranslate, [MarshalAs(UnmanagedType.BStr)] string pchURLIn, [MarshalAs(UnmanagedType.BStr)] ref string ppchURLOut)
    {
        const int NotTranslated = 1;
        return NotTranslated;
    }
    public IDataObject FilterDataObject(IDataObject pDO)
    {
        return null;
    }
    #endregion
}
public struct INTERNET_PROXY_INFO
{
    public int dwAccessType;
    public IntPtr proxy;
    public IntPtr proxyBypass;
}
public struct tagRECT
{
    public int left;
    public int top;
    public int right;
    public int bottom;
}
[StructLayout(LayoutKind.Sequential, Pack = 4)]
public struct tagPOINT
{
    public int x;
    public int y;
}
public enum DOCHOSTUITYPE
{
    DOCHOSTUITYPE_BROWSE = 0,
    DOCHOSTUITYPE_AUTHOR = 1
}
public enum DOCHOSTUIDBLCLK
{
    DOCHOSTUIDBLCLK_DEFAULT = 0,
    DOCHOSTUIDBLCLK_SHOWPROPERTIES = 1,
    DOCHOSTUIDBLCLK_SHOWCODE = 2
}
[Flags()]
public enum DOCHOSTUIFLAG
{
    DOCHOSTUIFLAG_DIALOG = 0x00000001,
    DOCHOSTUIFLAG_DISABLE_HELP_MENU = 0x00000002,
    DOCHOSTUIFLAG_NO3DBORDER = 0x00000004,
    DOCHOSTUIFLAG_SCROLL_NO = 0x00000008,
    DOCHOSTUIFLAG_DISABLE_SCRIPT_INACTIVE = 0x00000010,
    DOCHOSTUIFLAG_OPENNEWWIN = 0x00000020,
    DOCHOSTUIFLAG_DISABLE_OFFSCREEN = 0x00000040,
    DOCHOSTUIFLAG_FLAT_SCROLLBAR = 0x00000080,
    DOCHOSTUIFLAG_DIV_BLOCKDEFAULT = 0x00000100,
    DOCHOSTUIFLAG_ACTIVATE_CLIENTHIT_ONLY = 0x00000200,
    DOCHOSTUIFLAG_OVERRIDEBEHAVIORFACTORY = 0x00000400,
    DOCHOSTUIFLAG_CODEPAGELINKEDFONTS = 0x00000800,
    DOCHOSTUIFLAG_URL_ENCODING_DISABLE_UTF8 = 0x00001000,
    DOCHOSTUIFLAG_URL_ENCODING_ENABLE_UTF8 = 0x00002000,
    DOCHOSTUIFLAG_ENABLE_FORMS_AUTOCOMPLETE = 0x00004000,
    DOCHOSTUIFLAG_ENABLE_INPLACE_NAVIGATION = 0x00010000,
    DOCHOSTUIFLAG_IME_ENABLE_RECONVERSION = 0x00020000,
    DOCHOSTUIFLAG_THEME = 0x00040000,
    DOCHOSTUIFLAG_NOTHEME = 0x00080000,
    DOCHOSTUIFLAG_NOPICS = 0x00100000,
    DOCHOSTUIFLAG_NO3DOUTERBORDER = 0x00200000,
    DOCHOSTUIFLAG_DISABLE_EDIT_NS_FIXUP = 0x400000,
    DOCHOSTUIFLAG_LOCAL_MACHINE_ACCESS_CHECK = 0x800000,
    DOCHOSTUIFLAG_DISABLE_UNTRUSTEDPROTOCOL = 0x1000000
}
[StructLayout(LayoutKind.Sequential)]
public struct DOCHOSTUIINFO
{
    public uint cbSize;
    public uint dwFlags;
    public uint dwDoubleClick;
    [MarshalAs(UnmanagedType.BStr)]
    public string pchHostCss;
    [MarshalAs(UnmanagedType.BStr)]
    public string pchHostNS;
}
[StructLayout(LayoutKind.Sequential)]
public struct tagMSG
{
    public IntPtr hwnd;
    public uint message;
    public uint wParam;
    public int lParam;
    public uint time;
    public tagPOINT pt;
}
#region COM Interfaces
[ComImport, Guid("00000112-0000-0000-C000-000000000046"),
InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
public interface IOleObject
{
    void SetClientSite(IOleClientSite pClientSite);
    void GetClientSite(IOleClientSite ppClientSite);
    void SetHostNames(object szContainerApp, object szContainerObj);
    void Close(uint dwSaveOption);
    void SetMoniker(uint dwWhichMoniker, object pmk);
    void GetMoniker(uint dwAssign, uint dwWhichMoniker, object ppmk);
    void InitFromData(IDataObject pDataObject, bool
        fCreation, uint dwReserved);
    void GetClipboardData(uint dwReserved, IDataObject ppDataObject);
    void DoVerb(uint iVerb, uint lpmsg, object pActiveSite,
        uint lindex, uint hwndParent, uint lprcPosRect);
    void EnumVerbs(object ppEnumOleVerb);
    void Update();
    void IsUpToDate();
    void GetUserClassID(uint pClsid);
    void GetUserType(uint dwFormOfType, uint pszUserType);
    void SetExtent(uint dwDrawAspect, uint psizel);
    void GetExtent(uint dwDrawAspect, uint psizel);
    void Advise(object pAdvSink, uint pdwConnection);
    void Unadvise(uint dwConnection);
    void EnumAdvise(object ppenumAdvise);
    void GetMiscStatus(uint dwAspect, uint pdwStatus);
    void SetColorScheme(object pLogpal);
}
[ComImport, Guid("00000118-0000-0000-C000-000000000046"),
InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
public interface IOleClientSite
{
    void SaveObject();
    void GetMoniker(uint dwAssign, uint dwWhichMoniker, object ppmk);
    void GetContainer(object ppContainer);
    void ShowObject();
    void OnShowWindow(bool fShow);
    void RequestNewObjectLayout();
}
[ComImport, GuidAttribute("6d5140c1-7436-11ce-8034-00aa006009fa"),
InterfaceTypeAttribute(ComInterfaceType.InterfaceIsIUnknown),
ComVisible(false)]
public interface IServiceProvider
{
    [return: MarshalAs(UnmanagedType.I4)]
    [PreserveSig]
    int QueryService(ref Guid guidService, ref Guid riid, out IntPtr ppvObject);
}
[ComImport, GuidAttribute("79EAC9D0-BAF9-11CE-8C82-00AA004BA90B"),
InterfaceTypeAttribute(ComInterfaceType.InterfaceIsIUnknown),
ComVisible(false)]
public interface IAuthenticate
{
    [return: MarshalAs(UnmanagedType.I4)]
    [PreserveSig]
    int Authenticate(ref IntPtr phwnd, ref IntPtr pszUsername, ref IntPtr pszPassword);
}
[ComImport()]
[InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
[GuidAttribute("bd3f23c0-d43e-11cf-893b-00aa00bdce1a")]
public interface IDocHostUIHandler
{
    [PreserveSig]
    uint ShowContextMenu(
    uint dwID,
    ref tagPOINT ppt,
    [MarshalAs(UnmanagedType.IUnknown)]  object pcmdtReserved,
    [MarshalAs(UnmanagedType.IDispatch)] object pdispReserved
    );
    void GetHostInfo(ref DOCHOSTUIINFO pInfo);
    void ShowUI(uint dwID, ref object pActiveObject, ref object pCommandTarget, ref object pFrame, ref object pDoc);
    void HideUI();
    void UpdateUI();
    void EnableModeless(int fEnable);
    void OnDocWindowActivate(int fActivate);
    void OnFrameWindowActivate(int fActivate);
    void ResizeBorder(ref tagRECT prcBorder, int pUIWindow, int fFrameWindow);
    [PreserveSig]
    uint TranslateAccelerator(ref tagMSG lpMsg, ref Guid pguidCmdGroup, uint nCmdID);
    void GetOptionKeyPath([MarshalAs(UnmanagedType.BStr)] ref string pchKey, uint dw);
    uint GetDropTarget(int pDropTarget, ref int ppDropTarget);
    //object GetDropTarget(ref object pDropTarget);
    [PreserveSig]
    void GetExternal([MarshalAs(UnmanagedType.IDispatch)] out object ppDispatch);
    [PreserveSig]
    uint TranslateUrl(
    uint dwTranslate,
    [MarshalAs(UnmanagedType.BStr)] string pchURLIn,
    [MarshalAs(UnmanagedType.BStr)] ref string ppchURLOut
    );
    IDataObject FilterDataObject(IDataObject pDO);
}
#endregion
}

c# Webbrowsercontrol与代理和调用从Javascript到c#

webBrowser1。ObjectForScripting没有效果，因为您正在替换客户端站点。WinForms中的默认客户端站点实现了IDocHostUIHandler::GetExternal并返回ObjectForScripting的值。您可以在代理类中做同样的事情。

相关文章：