在c＃中读取复合文档

我正在开始一个需要在c＃中读取outlook msg文件的项目。 我有复合文档的规范，但在c＃中读取它们时遇到问题。 任何指针都将非常感激。

谢谢。

Answer 1

这是我的镜头。 这是本文的初始翻译。

namespace cs_console_app { using System; using System.Runtime.InteropServices; using System.Runtime.InteropServices.ComTypes; [ComImport] [Guid("0000000d-0000-0000-C000-000000000046")] [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)] public interface IEnumSTATSTG { // The user needs to allocate an STATSTG array whose size is celt. [PreserveSig] uint Next( uint celt, [MarshalAs(UnmanagedType.LPArray), Out] System.Runtime.InteropServices.ComTypes.STATSTG[] rgelt, out uint pceltFetched ); void Skip(uint celt); void Reset(); [return: MarshalAs(UnmanagedType.Interface)] IEnumSTATSTG Clone(); } [ComImport] [Guid("0000000b-0000-0000-C000-000000000046")] [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)] interface IStorage { void CreateStream( /* [string][in] */ string pwcsName, /* [in] */ uint grfMode, /* [in] */ uint reserved1, /* [in] */ uint reserved2, /* [out] */ out IStream ppstm); void OpenStream( /* [string][in] */ string pwcsName, /* [unique][in] */ IntPtr reserved1, /* [in] */ uint grfMode, /* [in] */ uint reserved2, /* [out] */ out IStream ppstm); void CreateStorage( /* [string][in] */ string pwcsName, /* [in] */ uint grfMode, /* [in] */ uint reserved1, /* [in] */ uint reserved2, /* [out] */ out IStorage ppstg); void OpenStorage( /* [string][unique][in] */ string pwcsName, /* [unique][in] */ IStorage pstgPriority, /* [in] */ uint grfMode, /* [unique][in] */ IntPtr snbExclude, /* [in] */ uint reserved, /* [out] */ out IStorage ppstg); void CopyTo( /* [in] */ uint ciidExclude, /* [size_is][unique][in] */ Guid rgiidExclude, // should this be an array? /* [unique][in] */ IntPtr snbExclude, /* [unique][in] */ IStorage pstgDest); void MoveElementTo( /* [string][in] */ string pwcsName, /* [unique][in] */ IStorage pstgDest, /* [string][in] */ string pwcsNewName, /* [in] */ uint grfFlags); void Commit( /* [in] */ uint grfCommitFlags); void Revert(); void EnumElements( /* [in] */ uint reserved1, /* [size_is][unique][in] */ IntPtr reserved2, /* [in] */ uint reserved3, /* [out] */ out IEnumSTATSTG ppenum); void DestroyElement( /* [string][in] */ string pwcsName); void RenameElement( /* [string][in] */ string pwcsOldName, /* [string][in] */ string pwcsNewName); void SetElementTimes( /* [string][unique][in] */ string pwcsName, /* [unique][in] */ System.Runtime.InteropServices.ComTypes.FILETIME pctime, /* [unique][in] */ System.Runtime.InteropServices.ComTypes.FILETIME patime, /* [unique][in] */ System.Runtime.InteropServices.ComTypes.FILETIME pmtime); void SetClass( /* [in] */ Guid clsid); void SetStateBits( /* [in] */ uint grfStateBits, /* [in] */ uint grfMask); void Stat( /* [out] */ out System.Runtime.InteropServices.ComTypes.STATSTG pstatstg, /* [in] */ uint grfStatFlag); } [Flags] public enum STGM : int { DIRECT = 0x00000000, TRANSACTED = 0x00010000, SIMPLE = 0x08000000, READ = 0x00000000, WRITE = 0x00000001, READWRITE = 0x00000002, SHARE_DENY_NONE = 0x00000040, SHARE_DENY_READ = 0x00000030, SHARE_DENY_WRITE = 0x00000020, SHARE_EXCLUSIVE = 0x00000010, PRIORITY = 0x00040000, DELETEONRELEASE = 0x04000000, NOSCRATCH = 0x00100000, CREATE = 0x00001000, CONVERT = 0x00020000, FAILIFTHERE = 0x00000000, NOSNAPSHOT = 0x00200000, DIRECT_SWMR = 0x00400000, } public enum STATFLAG : uint { STATFLAG_DEFAULT = 0, STATFLAG_NONAME = 1, STATFLAG_NOOPEN = 2 } public enum STGTY : int { STGTY_STORAGE = 1, STGTY_STREAM = 2, STGTY_LOCKBYTES = 3, STGTY_PROPERTY = 4 } class Program { [DllImport("ole32.dll")] private static extern int StgIsStorageFile( [MarshalAs(UnmanagedType.LPWStr)] string pwcsName); [DllImport("ole32.dll")] static extern int StgOpenStorage( [MarshalAs(UnmanagedType.LPWStr)] string pwcsName, IStorage pstgPriority, STGM grfMode, IntPtr snbExclude, uint reserved, out IStorage ppstgOpen); static void Main(string[] args) { string filename = @"f:\temp\treta2.msg"; if (StgIsStorageFile(filename) == 0) { IStorage storage = null; if (StgOpenStorage( filename, null, STGM.DIRECT | STGM.READ | STGM.SHARE_EXCLUSIVE, IntPtr.Zero, 0, out storage) == 0) { System.Runtime.InteropServices.ComTypes.STATSTG statstg; storage.Stat(out statstg, (uint) STATFLAG.STATFLAG_DEFAULT); IEnumSTATSTG pIEnumStatStg = null; storage.EnumElements(0, IntPtr.Zero, 0, out pIEnumStatStg); System.Runtime.InteropServices.ComTypes.STATSTG[] regelt = { statstg }; uint fetched = 0; uint res = pIEnumStatStg.Next(1, regelt, out fetched); if (res == 0) { while (res != 1) { string strNode = statstg.pwcsName; bool bNodeFound = false; Console.WriteLine(strNode); if (strNode == "__substg1.0_0E04001E" || strNode == "__substg1.0_0E1D001E" || strNode == "__substg1.0_1000001E" || strNode == "__substg1.0_1013001E") { bNodeFound = true; } if (bNodeFound) { switch (statstg.type) { case (int) STGTY.STGTY_STORAGE: { IStorage pIChildStorage; storage.OpenStorage(statstg.pwcsName, null, (uint) (STGM.READ | STGM.SHARE_EXCLUSIVE), IntPtr.Zero, 0, out pIChildStorage); } break; case (int) STGTY.STGTY_STREAM: { IStream pIStream; storage.OpenStream(statstg.pwcsName, IntPtr.Zero, (uint)(STGM.READ | STGM.SHARE_EXCLUSIVE), 0, out pIStream); byte[] data = new byte[255]; pIStream.Read(data, 255, IntPtr.Zero); } break; } } if ((res = pIEnumStatStg.Next(1, regelt, out fetched)) != 1) { statstg = regelt[0]; } } } } } Console.ReadLine(); } } } 

Answer 2

Outlook Interop 。 虽然我从未使用过Outlook互操作，但您应该能够使用它打开电子邮件。

MailItem接口应该是您访问它所需的接口。

此外，请确保在完成com引用后释放它们