6

我完全按照这个答案阅读并重新阅读了所有谷歌调查结果。不幸的是,大多数人都只是引用答案的复制和粘贴(包括“停止将头撞到墙上去庆祝!”)句子,它对我不起作用......所以经过半天的工作我真的要开始敲我的头了...

我的简单错误:javascript windows.myExtension 对象是“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。似乎该属性集在 javascript 端不可见。

更多信息:

  • 我使用 Debugger.Launch() 语句来方便地调试我的扩展,断点被命中,所有 BHO 扩展函数都被正确调用和运行。
  • 注释的替代方法(带有 property.SetProperty)也不起作用,出现同样的错误:

    console.log(window.myExtension); // 写入'undefined',为什么?

  • 使用 VS 2010、Windows 7 x64、IE 9

请让我帮助运行这个......提前谢谢

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);
}
}

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);
}
}

构建后步骤配置如下(并正常运行):

"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)"
4

2 回答 2

1

我对此有一个hack-y解决方案。它现在对我有用,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 正确识别问题。在SetSite函数中,我们正在向DocumentComplete事件添加处理程序。所以当我们在$.ready().

所以我所做的是将处理程序添加到 BeforeScriptExecute 事件。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

   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DocumentComplete方法中的代码并在顶部注释掉了条件。

结果,我可以myprop在 jquery中看到$.ready()。这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事情。

我还不知道有什么用pDispWindow以及不检查它是否为空等的影响是什么。

于 2016-01-27T13:10:13.790 回答
0

用窗户试试。外部.myExtension(); 据我所知,外部是保存您表单的对象。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。

这是一个适合您的简单表格:

[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);
  }
}

然后在页面中:

$(document).ready(function() {
   alert(window.external.TestMethod("It will hopefully work."));
}
于 2014-02-27T16:26:27.677 回答