从Javascript调用C#BHO方法(仍然无法正常工作)

Question

从Javascript调用C#BHO方法(仍然无法正常工作)

g.p*_*dou 6 c# com internet-explorer bho

我完全按照这个答案阅读并重读了所有谷歌的调查结果.不幸的是,大部分都只是所引用答案的复制和粘贴(包括"停止撞墙而去庆祝!")这句话对我不起作用......所以经过半天的工作我就是真的要开始敲我的脑袋了......

我的简单错误:javascript windows.myExtension对象是'undefined'所以在它上面调用Foo会引发错误.请参阅下面的完整资源.看起来属性集在javascript方面是不可见的.

更多信息:

我使用Debugger.Launch()语句来方便地调试我的扩展,并且命中断点,并且所有BHO扩展函数都被正确调用并运行.
注释的替代(使用property.SetProperty)也不起作用,具有相同的错误:

的console.log(window.myExtension); //写'undefined',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>

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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;
    }
}

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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);
}
}

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IExtension.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);
}
}

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后构建步骤配置如下(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)"

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Answer 1

Pav*_*hev 0

尝试用窗户。外部.myExtension(); 据我所知，外部是指承载你形态的物体。另外，如果这不起作用——一定要先尝试简单的事情，然后进行相反的工作。

这是一个应该适合您的简单表格：

[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);
  }
}

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然后在页面中：

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

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