internetexplorer-从Javascript调用C#BHO方法(仍然无法工作)

本文关键字:工作 Javascript 调用 C#BHO 方法 internetexplorer- | 更新日期: 2023-09-27 18:01:04

我准确地遵循了这个答案,反复阅读了所有谷歌搜索结果。不幸的是,大多数都只是参考答案的复制粘贴(包括"别再把头撞墙了,去庆祝吧!"(这句话对我不起作用……所以工作了半天,我真的要开始撞头了。。。

我的简单错误:javascript windows.myExtension对象"未定义",因此在其上调用Foo会引发错误。请参阅下面的完整来源。在javascript端似乎无法查看属性集。

更多信息:

  • 我使用Debugger.Launch((语句来方便地调试我的扩展,并且断点被命中,所有BHO扩展函数都被正确地调用和运行
  • 注释的备选方案(具有属性.SetProperty(也不起作用,出现相同错误:

    console.log(window.myExtension(;//写"未定义",为什么?

  • 使用VS 2010,Windows 7 x64,IE 9

请让我帮忙运行这个。。。Thx提前

简单的测试页面:

<!DOCTYPE html>
<html>
<head>
    <script type="text/javascript">
    console.log(window.myExtension);  // Writes undefined why? It should be an object...
    var result = window.myExtension.Foo("bar"); // Obviously throws and error if window.myExtension is undefined 
    </script>
    <title></title>
</head>
<body>
</body>
</html>

BrowserHelperObject.cs

using System;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Runtime.InteropServices.Expando;
using Microsoft.Win32;
using SHDocVw;
namespace IEExtensionTest
{
[ComVisible(true)]
[Guid("DA8EA345-02AE-434E-82E9-448E3DB7629E")]
[ClassInterface(ClassInterfaceType.None)]
[ProgId("MyExtension")]
[ComDefaultInterface(typeof(IExtension))]
public class BrowserHelperObject : IObjectWithSite, IExtension
{
    private WebBrowser webBrowser;
    public int Foo(string s)
    {
        return 0;
    }
    public void OnDocumentComplete(dynamic frame, ref dynamic url)
    {
        Debugger.Launch();
        dynamic window = webBrowser.Document.parentWindow;
        var windowEx = (IExpando)window;
        windowEx.AddProperty("myExtension");
        window.myExtension = this;
        //var property = windowEx.AddProperty("MyExtension");
        //property.SetValue(windowEx, this, null);
    }

    public static string BHOKEYNAME = "Software''Microsoft''Windows''CurrentVersion''Explorer''Browser Helper Objects";
    [ComRegisterFunction]
    public static void RegisterBHO(Type type)
    {
        RegistryKey registryKey = Registry.LocalMachine.OpenSubKey(BHOKEYNAME, true);
        if (registryKey == null)
            registryKey = Registry.LocalMachine.CreateSubKey(BHOKEYNAME);
        string guid = type.GUID.ToString("B");
        RegistryKey ourKey = registryKey.OpenSubKey(guid);
        if (ourKey == null)
            ourKey = registryKey.CreateSubKey(guid);
        ourKey.SetValue("Alright", 1);
        registryKey.Close();
        ourKey.Close();
    }
    [ComUnregisterFunction]
    public static void UnregisterBHO(Type type)
    {
        RegistryKey registryKey = Registry.LocalMachine.OpenSubKey(BHOKEYNAME, true);
        string guid = type.GUID.ToString("B");
        if (registryKey != null)
            registryKey.DeleteSubKey(guid, false);
    }
    public int SetSite(object site)
    {
        if (site != null)
        {
            webBrowser = (WebBrowser)site;
            webBrowser.DocumentComplete += OnDocumentComplete;
        }
        else
        {
            webBrowser.DocumentComplete -= OnDocumentComplete;
            webBrowser = null;
        }
        return 0;
    }
    public int GetSite(ref Guid guid, out IntPtr ppvSite)
    {
        IntPtr punk = Marshal.GetIUnknownForObject(webBrowser);
        int hr = Marshal.QueryInterface(punk, ref guid, out ppvSite);
        Marshal.Release(punk);
        return hr;
    }
}

IObjectWithSite.cs

using System;
using System.Runtime.InteropServices;
namespace IEExtensionTest
{
[ComVisible(true)]
[InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
[Guid("FC4801A3-2BA9-11CF-A229-00AA003D7352")]
public interface IObjectWithSite
{
    [PreserveSig]
    int SetSite([MarshalAs(UnmanagedType.IUnknown)] object site);
    [PreserveSig]
    int GetSite(ref Guid guid, out IntPtr ppvSite);
}
}

IE扩展.cs

using System;
using System.Runtime.InteropServices;
namespace IEExtensionTest
{
[ComVisible(true)]
[InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
[Guid("FC4801A3-2BA9-11CF-A229-00AA003D7352")]
public interface IObjectWithSite
{
    [PreserveSig]
    int SetSite([MarshalAs(UnmanagedType.IUnknown)] object site);
    [PreserveSig]
    int GetSite(ref Guid guid, out IntPtr ppvSite);
}
}

构建后步骤配置如下(并正确运行(:

"C:'Program Files (x86)'Microsoft SDKs'Windows'v7.0A'Bin'NETFX 4.0 Tools'gacutil.exe" /f /i "$(TargetDir)$(TargetFileName)"
"C:'Windows'Microsoft.NET'Framework'v4.0.30319'RegAsm.exe" /unregister "$(TargetDir)$(TargetFileName)"
"C:'Windows'Microsoft.NET'Framework'v4.0.30319'RegAsm.exe" "$(TargetDir)$(TargetFileName)"

internetexplorer-从Javascript调用C#BHO方法(仍然无法工作)

我有一个破解的解决方案。它现在对我有效,所以我把它贴在这里。如果我遇到任何问题,我会更新这篇文章。

@Eli Gassert正确识别了问题。在SetSite函数中,我们将向DocumentComplete事件添加一个处理程序。因此,当我们处于$.ready()时,它不会执行。

所以我所做的是将处理程序添加到BeforeScriptExecute事件中。这是我的BHO.cs 的相关部分

public int SetSite(object site)
    {
        this.site = site;
        if(site != null)
        {
            webBrowser = (IWebBrowser2)site;
            ((DWebBrowserEvents2_Event)webBrowser).BeforeScriptExecute += S2_BeforeScriptExecute;
            //((DWebBrowserEvents2_Event)webBrowser).DocumentComplete += S2_DocumentComplete;
        }
        else
        {
            ((DWebBrowserEvents2_Event)webBrowser).BeforeScriptExecute -= S2_BeforeScriptExecute;
            //((DWebBrowserEvents2_Event)webBrowser).DocumentComplete -= S2_DocumentComplete;
            webBrowser = null;
        }
        return 0;
    }

处理程序的签名不同,这里是处理程序的代码。这仍然在BHO.cs 中

   private void S2_BeforeScriptExecute(object pDispWindow)
    {
        //if (pDisp != this.site) { return; }
        dynamic window = webBrowser.Document.parentWindow;
        IExpando windowEx = (IExpando)window;
        windowEx.AddProperty("myprop");
        window.myprop = this;
    }

我只是粘贴了来自DocumentComplete方法的代码,并在顶部注释掉了条件。

因此,我能够在jquery $.ready()中看到myprop。这已经解决了我眼前的问题,我正在继续我的代码。

不用说,我的插件只提供将从javascript调用的方法,不需要对文档内容做任何操作。

我还不知道pDispWindow有什么用,不检查它是否为null会有什么影响,等等。

尝试使用窗口外部.myExtension((;在我记忆中,外部是保持你的形体的物体。此外,如果这不起作用,一定要先尝试简单的事情,然后反其道而行之。

这里有一个简单的表单应该对你有效:

[PermissionSet(SecurityAction.Demand, Name = "FullTrust")] // Note full trust.
[System.Runtime.InteropServices.ComVisibleAttribute(true)]
public partial class BasicJSScriptableForm : Form
{
  private void BasicJSScriptableForm _Load(object sender, EventArgs e){
     this.WebBrowser1.Navigate("yourpage");
  }
  public string TestMethod(string input){
     return string.Format("echo: {0}", input);
  }
}

然后在页面中:

$(document).ready(function() {
   alert(window.external.TestMethod("It will hopefully work."));
}