Par*_*ris 7 .net c# powerpoint vsto
我在powerpoint中为幻灯片添加了一些不同的文件类型.这些类型包括mp4,zip,swf和其他格式.我不是想找回一种播放这些文件类型的方法; 但是,我想在一个powerpoint中存储和检索文件.
我通过执行以下操作成功存储了这些不同的文件类型:
currentSlide.Shapes.AddOLEObject(0, 0, -1, -1, "", this.filePath);
我也可以通过右键单击对象 - >选择编辑包 - >文件 - >保存内容来手动检索它们.
我希望复制或使用此功能将OLEObject的内容保存回其原始状态和我指定的路径.我有办法找到那个形状,我认为这个对象包含了内容:slideShape.OLEFormat.Object我只是不知道现在该做什么.想法？谢谢.
哦,我正在使用Office 2010,如果这有任何区别.
所以，我知道现在已经晚了；不过，我知道其他人一定也有类似的问题。
\n\n我就这个问题联系了微软，他们花了大约一个月的时间，但他们终于给了我答案。我有一个解决方案的压缩包。它相当广泛，请查看下面的简单源代码。
\n\n首先是一些说明：
\n\n1) 创建 PowerPoint 演示文稿并在其中嵌入一些文件（视频、mp3、zip 等）
\n2) 将文件保存到以下位置 C:\\Temp\\Temp.pptx
\n3) 关闭文件
\n4) 创建\xe2\x80\x9cC:\\Temp\xe2\x80\x9d
\n5) 打开应用程序并运行它。
所以唯一的缺点是 PPTX 文件必须关闭。话虽如此，人们也许能够将打开的 PPTX 文件复制到其他位置，然后从该位置提取文件，而不是实际正在处理的 PPTX。然后把临时的删除就可以了。我们会看到。这已经是该解决方案最接近的结果了。
\n\n无需进一步告别：
\n\nusing System;\nusing System.Collections.Generic;\nusing System.Linq;\nusing System.Text;\n\nusing System.IO.Packaging;\nusing System.Runtime.InteropServices;\nusing System.IO;\n\nnamespace ExtractOLEPowerPoint\n{\nclass Program\n{\n\n #region IEnumSTATSTG\n [ComImport]\n [Guid("0000000d-0000-0000-C000-000000000046")]\n [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]\n public interface IEnumSTATSTG\n {\n // The user needs to allocate an STATSTG array whose size is celt.\n [PreserveSig]\n uint Next(uint celt, [MarshalAs(UnmanagedType.LPArray), Out] System.Runtime.InteropServices.ComTypes.STATSTG[] rgelt, out uint pceltFetched);\n\n void Skip(uint celt);\n\n void Reset();\n\n [return: MarshalAs(UnmanagedType.Interface)]\n IEnumSTATSTG Clone();\n }\n #endregion\n\n //#region IStream\n\n //[ComImport, Guid("0000000c-0000-0000-C000-000000000046"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]\n //public interface IStream\n //{\n // void Read([Out, MarshalAs(UnmanagedType.LPArray, SizeParamIndex = 1)] byte[] pv, uint cb, out uint pcbRead);\n // void Write([MarshalAs(UnmanagedType.LPArray, SizeParamIndex = 1)] byte[] pv, uint cb, out uint pcbWritten);\n // void Seek(long dlibMove, uint dwOrigin, out long plibNewPosition);\n // void SetSize(long libNewSize);\n // void CopyTo(IStream pstm, long cb, out long pcbRead, out long pcbWritten);\n // void Commit(uint grfCommitFlags);\n // void Revert();\n // void LockRegion(long libOffset, long cb, uint dwLockType);\n // void UnlockRegion(long libOffset, long cb, uint dwLockType);\n // void Stat(out STATSTG pstatstg, uint grfStatFlag);\n // void Clone(out IStream ppstm);\n //}\n\n //#endregion\n\n #region STATFLAG\n\n [Flags]\n public enum STATFLAG : uint\n {\n STATFLAG_DEFAULT = 0,\n STATFLAG_NONAME = 1,\n STATFLAG_NOOPEN = 2\n }\n\n #endregion\n\n #region IStorage\n [ComImport]\n [Guid("0000000b-0000-0000-C000-000000000046")]\n [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]\n interface IStorage\n {\n void CreateStream(\n /* [string][in] */ string pwcsName,\n /* [in] */ uint grfMode,\n /* [in] */ uint reserved1,\n /* [in] */ uint reserved2,\n /* [out] */ out System.Runtime.InteropServices.ComTypes.IStream ppstm);\n void OpenStream(\n /* [string][in] */ string pwcsName,\n /* [unique][in] */ IntPtr reserved1,\n /* [in] */ uint grfMode,\n /* [in] */ uint reserved2,\n /* [out] */ out System.Runtime.InteropServices.ComTypes.IStream ppstm);\n\n void CreateStorage(\n /* [string][in] */ string pwcsName,\n /* [in] */ uint grfMode,\n /* [in] */ uint reserved1,\n /* [in] */ uint reserved2,\n /* [out] */ out IStorage ppstg);\n\n void OpenStorage(\n /* [string][unique][in] */ string pwcsName,\n /* [unique][in] */ IStorage pstgPriority,\n /* [in] */ uint grfMode,\n /* [unique][in] */ IntPtr snbExclude,\n /* [in] */ uint reserved,\n /* [out] */ out IStorage ppstg);\n\n void CopyTo(\n /* [in] */ uint ciidExclude,\n /* [size_is][unique][in] */ Guid rgiidExclude, // should this be an array?\n /* [unique][in] */ IntPtr snbExclude,\n /* [unique][in] */ IStorage pstgDest);\n\n void MoveElementTo(\n /* [string][in] */ string pwcsName,\n /* [unique][in] */ IStorage pstgDest,\n /* [string][in] */ string pwcsNewName,\n /* [in] */ uint grfFlags);\n\n void Commit(\n /* [in] */ uint grfCommitFlags);\n\n void Revert();\n\n void EnumElements(\n /* [in] */ uint reserved1,\n /* [size_is][unique][in] */ IntPtr reserved2,\n /* [in] */ uint reserved3,\n /* [out] */ out IEnumSTATSTG ppenum);\n\n void DestroyElement(\n /* [string][in] */ string pwcsName);\n\n void RenameElement(\n /* [string][in] */ string pwcsOldName,\n /* [string][in] */ string pwcsNewName);\n\n void SetElementTimes(\n /* [string][unique][in] */ string pwcsName,\n /* [unique][in] */ System.Runtime.InteropServices.ComTypes.FILETIME pctime,\n /* [unique][in] */ System.Runtime.InteropServices.ComTypes.FILETIME patime,\n /* [unique][in] */ System.Runtime.InteropServices.ComTypes.FILETIME pmtime);\n\n void SetClass(\n /* [in] */ Guid clsid);\n\n void SetStateBits(\n /* [in] */ uint grfStateBits,\n /* [in] */ uint grfMask);\n\n void Stat(\n /* [out] */ out System.Runtime.InteropServices.ComTypes.STATSTG pstatstg,\n /* [in] */ uint grfStatFlag);\n }\n\n #endregion\n\n #region STGM\n [Flags]\n public enum STGM : int\n {\n DIRECT = 0x00000000,\n TRANSACTED = 0x00010000,\n SIMPLE = 0x08000000,\n READ = 0x00000000,\n WRITE = 0x00000001,\n READWRITE = 0x00000002,\n SHARE_DENY_NONE = 0x00000040,\n SHARE_DENY_READ = 0x00000030,\n SHARE_DENY_WRITE = 0x00000020,\n SHARE_EXCLUSIVE = 0x00000010,\n PRIORITY = 0x00040000,\n DELETEONRELEASE = 0x04000000,\n NOSCRATCH = 0x00100000,\n CREATE = 0x00001000,\n CONVERT = 0x00020000,\n FAILIFTHERE = 0x00000000,\n NOSNAPSHOT = 0x00200000,\n DIRECT_SWMR = 0x00400000,\n }\n\n #endregion\n\n #region StgIsStorageFile\n\n [DllImport("Ole32.dll")]\n static extern int StgIsStorageFile([MarshalAs(UnmanagedType.LPWStr)]string filename);\n\n #endregion\n\n #region StgOpenStorage\n\n [DllImport("Ole32.dll")]\n static extern int StgOpenStorage([MarshalAs(UnmanagedType.LPWStr)]string pwcsName, IStorage pstgPriority, STGM grfmode, IntPtr snbExclude, uint researved, out IStorage ppstgOpen);\n\n #endregion\n\n static void Main(string[] args)\n {\n Package pkg = Package.Open("C:\\\\Temp\\\\Temp.pptx");\n foreach (PackagePart pkgprt in pkg.GetParts())\n {\n if(pkgprt.Uri.ToString().StartsWith("/ppt/embeddings/"))\n {\n System.IO.Stream strm = pkgprt.GetStream();\n byte[] buffer = new byte[strm.Length];\n strm.Read(buffer, 0, (int)strm.Length);\n strm.Close();\n\n // Create a temporary file\n string targetFile = "C:\\\\Temp\\\\GeneratedFiles\\\\" + pkgprt.Uri.ToString().Remove(0, "/ppt/embeddings/".Length);\n System.IO.File.WriteAllBytes(targetFile, buffer);\n\n // Extract the contents.\n IStorage Is;\n StgOpenStorage(targetFile, null, STGM.READWRITE | STGM.SHARE_EXCLUSIVE, IntPtr.Zero, 0, out Is);\n ProcessPackage(Is);\n\n // Need to release the IStorage object and call GC.Collect() to free the object\n Marshal.ReleaseComObject(Is);\n Is = null;\n GC.Collect();\n GC.WaitForPendingFinalizers();\n\n // Delete the temporary binary file extracted\n File.Delete(targetFile);\n }\n }\n }\n static void ProcessPackage(IStorage pStg)\n {\n System.Runtime.InteropServices.ComTypes.IStream pStream;\n IEnumSTATSTG pEnumStatStg;\n uint numReturned;\n pStg.EnumElements(0, IntPtr.Zero, 0, out pEnumStatStg);\n System.Runtime.InteropServices.ComTypes.STATSTG[] ss = new System.Runtime.InteropServices.ComTypes.STATSTG[1];\n // Loop through the STATSTG structures in the storage.\n do\n {\n // Retrieve the STATSTG structure\n pEnumStatStg.Next(1, ss, out numReturned);\n if (numReturned != 0)\n {\n //System.Runtime.InteropServices.ComTypes.STATSTG statstm;\n byte[] bytT = new byte[4];\n // Check if the pwcsName contains "Ole10Native" stream which contain the actual embedded object\n if (ss[0].pwcsName.Contains("Ole10Native") == true)\n {\n // Get the stream objectOpen the stream\n pStg.OpenStream(ss[0].pwcsName, IntPtr.Zero, (uint)STGM.READ | (uint)STGM.SHARE_EXCLUSIVE, 0, out pStream);\n //pStream.Stat(out statstm, (int) STATFLAG.STATFLAG_DEFAULT);\n\n IntPtr position = IntPtr.Zero;\n // File name starts from 7th Byte.\n // Position the cursor to the 7th Byte.\n pStream.Seek(6, 0, position);\n\n IntPtr ulRead = new IntPtr();\n char[] filename = new char[260];\n int i;\n\n // Read the File name of the embedded object\n for (i = 0; i < 260; i++)\n {\n pStream.Read(bytT, 1, ulRead);\n pStream.Seek(0, 1, position);\n filename[i] = (char)bytT[0];\n if (bytT[0] == 0)\n {\n break;\n }\n }\n string path = new string(filename, 0, i);\n\n // Next part is the source path of the embedded object.\n // Length is unknown. Hence, loop through each byte to read the 0 terminated string\n // Read the source path.\n for (i = 0; i < 260; i++)\n {\n pStream.Read(bytT, 1, ulRead);\n pStream.Seek(0, 1, position);\n filename[i] = (char)bytT[0];\n if (bytT[0] == 0)\n {\n break;\n }\n }\n // Source File path\n string fullpath = new string(filename, 0, i);\n\n // Unknown 4 bytes\n pStream.Seek(4, 1, position);\n\n // Next 4 byte gives the length of the temporary file path \n // (Office uses a temporary location to copy the files before inserting to the document)\n // The length is in little endian format. Hence conversion is needed\n pStream.Read(bytT, 4, ulRead);\n ulong dwSize, dwTemp;\n dwSize = 0;\n dwTemp = (ulong)bytT[3];\n dwSize += (ulong)(bytT[3] << 24);\n dwSize += (ulong)(bytT[2] << 16);\n dwSize += (ulong)(bytT[1] << 8);\n dwSize += bytT[0];\n\n // Skip the temporary file path\n pStream.Seek((long)dwSize, 1, position);\n\n // Next four bytes gives the size of the actual data in little endian format.\n // Convert the format.\n pStream.Read(bytT, 4, ulRead);\n dwTemp = 0;\n dwSize = 0;\n dwTemp = (ulong)bytT[3];\n dwSize += (ulong)(bytT[3] << 24);\n dwSize += (ulong)(bytT[2] << 16);\n dwSize += (ulong)(bytT[1] << 8);\n dwSize += (ulong)bytT[0];\n\n // Read the actual file content \n byte[] byData = new byte[dwSize];\n pStream.Read(byData, (int)dwSize, ulRead);\n\n // Create the file\n System.IO.BinaryWriter bWriter = new System.IO.BinaryWriter(System.IO.File.Open("C:\\\\temp\\\\GeneratedFiles\\\\" + path, System.IO.FileMode.Create));\n bWriter.Write(byData);\n bWriter.Close();\n }\n }\n }\n while (numReturned > 0);\n }\n}\n}\n