为什么不是我的IE MIME筛选器正在创建或叫什么名字？ [英] Why isn't my IE MIME filter being created or called?
问题描述
我试图创建一个MIME筛选器将它们传递给我们的Windows应用程序的Web浏览器控件之前做网页获得一些资源加工定制。该应用程序是用C＃，我想如果可能的话写在托管code中的MIME过滤器为好，。我在与它的麻烦，虽然：我滤镜对象，似乎并没有被获取调用所有
I'm trying to create a MIME filter to do some custom processing of resources received with web pages before passing them to the web browser control in our Windows application. The application is written in C#, and I'd like to write the MIME filter in managed code as well, if possible. I'm having trouble with it though: my filter object doesn't seem to be getting called at all.
下面是我的code。很抱歉，这是这么长时间，但我想我可能会错误地在COM接口来定义的东西，所以我包括那些也。任何想法，我做错了什么？
Here's my code. Sorry it's so long, but I think I might be defining something incorrectly in the COM interfaces, so I'm including those also. Any ideas what I'm doing wrong?
[ComImport]
[InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
[Guid("00000001-0000-0000-C000-000000000046")]
public interface IClassFactory
{
void CreateInstance([MarshalAs(UnmanagedType.IUnknown)] object pUnkOuter, ref Guid riid, out IntPtr ppvObject);
void LockServer(bool fLock);
}
[ComImport]
[InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
[Guid("79EAC9E4-BAF9-11CE-8C82-00AA004BA90B")]
public interface IInternetProtocol : IInternetProtocolRoot
{
void LockRequest(Int32 dwOptions);
[PreserveSig]
Int32 Read(IntPtr pv, UInt32 cb, out UInt32 pcbRead);
void Seek(Int64 dlibMove, UInt32 dwOrigin, out UInt64 plibNewPosition);
void UnlockRequest();
}
[ComImport]
[InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
[Guid("79EAC9E3-BAF9-11CE-8C82-00AA004BA90B")]
public interface IInternetProtocolRoot
{
void Abort(Int32 hrReason, Int32 dwOptions);
void Continue(IntPtr pProtocolData);
void Resume();
void Start([MarshalAs(UnmanagedType.LPWStr)] string szUrl, IInternetProtocolSink pOIProtSink,
IntPtr pOIBindInfo, UInt32 grfPI, IntPtr dwReserved);
void Suspend();
void Terminate(Int32 dwOptions);
}
[ComImport]
[InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
[Guid("79EAC9E5-BAF9-11CE-8C82-00AA004BA90B")]
public interface IInternetProtocolSink
{
void Switch(IntPtr pProtocolData);
void ReportProgress(UInt32 ulStatusCode, [MarshalAs(UnmanagedType.LPWStr)] string szStatusText);
void ReportData(UInt32 grfBSCF, UInt32 ulProgress, UInt32 ulProgressMax);
void ReportResult(Int32 hrResult, UInt32 dwError, [MarshalAs(UnmanagedType.LPWStr)] string szResult);
}
[ComImport]
[InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
[Guid("79eac9e7-baf9-11ce-8c82-00aa004ba90b")]
public interface IInternetSession
{
void CreateBinding(); // Not Implemented
void GetCache(); // Not Implemented
void GetSessionOption(); // Not Implemented
void RegisterMimeFilter([MarshalAs(UnmanagedType.Interface)] IClassFactory pCF, ref Guid rclsid, [MarshalAs(UnmanagedType.LPWStr)] string pwzType);
void RegisterNameSpace([MarshalAs(UnmanagedType.Interface)] IClassFactory pCF, ref Guid rclsid, [MarshalAs(UnmanagedType.LPWStr)] string pwzProtocol,
UInt32 cPatterns, [MarshalAs(UnmanagedType.LPWStr)] string ppwzPatterns, UInt32 dwReserved);
void SetCache(); // Not Implemented
void SetSessionOption(); // Not Implemented
void UnregisterMimeFilter(IClassFactory pCF, [MarshalAs(UnmanagedType.LPWStr)] string pwzType);
void UnregisterNameSpace(IClassFactory pCF, [MarshalAs(UnmanagedType.LPWStr)] string pwzProtocol);
}
[ComVisible(true)]
[InterfaceType(ComInterfaceType.InterfaceIsDual)]
[Guid("C3ED53DA-EC0E-4625-AB0C-9837D0D0D59D")]
public interface _MimeFilter : IClassFactory, IInternetProtocol, IInternetProtocolRoot, IInternetProtocolSink
{
}
[ComVisible(true)]
[ClassInterface(ClassInterfaceType.None)]
[Guid("C3ED53DA-EC0E-4625-AB0C-9837D0D0D59D")]
public class MimeFilter : _MimeFilter
{
#region [ IClassFactory ]
public void CreateInstance([MarshalAs(UnmanagedType.IUnknown)] object pUnkOuter, ref Guid riid, out IntPtr ppvObject)
{
... // This is never called
}
...
}
internal class FilterUtils
{
/// <summary>
/// Registers the MIME filter for the current process
/// </summary>
public static void RegisterFilter()
{
IInternetSession session = null;
int status = NativeMethods.CoInternetGetSession(0, ref session, 0);
MimeFilter mf = new MimeFilter();
Guid id = new Guid("C3ED53DA-EC0E-4625-AB0C-9837D0D0D59D");
session.RegisterMimeFilter(mf, ref id, "text/html; charset=UTF-8");
}
private static class NativeMethods
{
[DllImport("urlmon.dll")]
public static extern int CoInternetGetSession(UInt32 dwSessionMode /* = 0 */, ref IInternetSession ppIInternetSession, UInt32 dwReserved /* = 0 */);
}
}
据我所知，这应该发生接下来的事情是，MimeFilter.CreateInstance（）方法被调用。它不获取调用，也不是任何的在MimeFilter其它方法
As far as I can tell, the next thing that should happen is that the MimeFilter.CreateInstance() method should be called. It's not getting called, nor are any of the other methods in MimeFilter.
我倒是AP preciate任何帮助，任何人都可以提供。谢谢你。
I'd appreciate any help anyone can offer. Thanks.
推荐答案
原来MSDN文档和Visual Studio 2008不同意有关默认COM可见性。 MSDN文档说，所有的.NET类型是可见的COM默认，但Visual Studio 2008的类库项目模板禁用AssemblyInfo.cs文件COM的知名度。
Turns out the MSDN documentation and Visual Studio 2008 disagree about default COM visibility. The MSDN documentation says that all .NET types are visible to COM by default, but the Visual Studio 2008 class library project template disables COM visibility in the AssemblyInfo.cs file.
解决方法：删除行
[assembly: ComVisible(false)]
从AssemblyInfo.cs文件。
from the AssemblyInfo.cs file.
我可能也有坏的COM接口声明。我把它换成他们从这个$ C $的CProject文件。
I may have also had bad COM interface declarations. I've replaced them with the ones from this CodeProject document.
唯一可读的MIME筛选器示例code，我发现可用的这里和（简述）这里记录。
The only readable MIME filter sample code I've found is available here and (briefly) documented here.
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