谢谢了
例子: public interface IMediaControl
{
[PreserveSig]
int Run(); [PreserveSig]
int Pause(); [PreserveSig]
int Stop(); [PreserveSig]
int GetState([In] int msTimeout, [Out] out FilterState pfs); [PreserveSig]
int RenderFile([In, MarshalAs(UnmanagedType.BStr)] string strFilename); [PreserveSig,
Obsolete("Automation interface, for pre-.NET VB. Use IGraphBuilder::AddSourceFilter instead", false)]
int AddSourceFilter(
[In, MarshalAs(UnmanagedType.BStr)] string strFilename,
[Out, MarshalAs(UnmanagedType.IDispatch)] out object ppUnk
); [PreserveSig,
Obsolete("Automation interface, for pre-.NET VB. Use IFilterGraph::EnumFilters instead", false)]
int get_FilterCollection([Out, MarshalAs(UnmanagedType.IDispatch)] out object ppUnk); [PreserveSig,
Obsolete("Automation interface, for pre-.NET VB. Use IFilterMapper2::EnumMatchingFilters instead", false)]
int get_RegFilterCollection([Out, MarshalAs(UnmanagedType.IDispatch)] out object ppUnk); [PreserveSig]
int StopWhenReady();
}[PreserveSig]是作什么用啊 谢谢 !!!!!
例子: public interface IMediaControl
{
[PreserveSig]
int Run(); [PreserveSig]
int Pause(); [PreserveSig]
int Stop(); [PreserveSig]
int GetState([In] int msTimeout, [Out] out FilterState pfs); [PreserveSig]
int RenderFile([In, MarshalAs(UnmanagedType.BStr)] string strFilename); [PreserveSig,
Obsolete("Automation interface, for pre-.NET VB. Use IGraphBuilder::AddSourceFilter instead", false)]
int AddSourceFilter(
[In, MarshalAs(UnmanagedType.BStr)] string strFilename,
[Out, MarshalAs(UnmanagedType.IDispatch)] out object ppUnk
); [PreserveSig,
Obsolete("Automation interface, for pre-.NET VB. Use IFilterGraph::EnumFilters instead", false)]
int get_FilterCollection([Out, MarshalAs(UnmanagedType.IDispatch)] out object ppUnk); [PreserveSig,
Obsolete("Automation interface, for pre-.NET VB. Use IFilterMapper2::EnumMatchingFilters instead", false)]
int get_RegFilterCollection([Out, MarshalAs(UnmanagedType.IDispatch)] out object ppUnk); [PreserveSig]
int StopWhenReady();
}[PreserveSig]是作什么用啊 谢谢 !!!!!
PreserveSig的全称是PreserveSigAttribute你看Attribute的帮助就明白了....