c# - FileDescriptora Missing Characters -


i using code found here drag-drop .msg files directly outlook. filedescriptora class implemented this:

[structlayout(layoutkind.sequential, charset = charset.ansi)] public sealed class filedescriptora {     public uint dwflags;     public guid clsid;     public sizel sizel;     public pointl pointl;     public uint dwfileattributes;     public system.runtime.interopservices.comtypes.filetime ftcreationtime;     public system.runtime.interopservices.comtypes.filetime ftlastaccesstime;     public system.runtime.interopservices.comtypes.filetime ftlastwritetime;     public uint nfilesizehigh;     public uint nfilesizelow;     [marshalas(unmanagedtype.byvaltstr, sizeconst = 260)]     public string cfilename; }

and code file names is:

memorystream fgdstream =    (memorystream)e.data.getdata("filegroupdescriptor"); byte[] fgdbytes = new byte[fgdstream.length]; fgdstream.read(fgdbytes, 0, fgdbytes.length); fgdstream.close();  //copy file group descriptor unmanaged memory intptr fgdaptr = marshal.allochglobal(fgdbytes.length); marshal.copy(fgdbytes, 0, fgdaptr, fgdbytes.length);  int numfiles = marshal.readint32(fgdaptr);  string[] filenames = new string[numfiles];  //get pointer first file descriptor intptr fdptr = (intptr)((int)fgdapointer + marshal.sizeof(fgdapointer));  //loop number of files acording file group descriptor for(int fdindex = 0;fdindex < numfiles;fdindex++) {     //marshal pointer file descriptor filedescriptora struct     object fdobj = marshal.ptrtostructure(fdptr,                            typeof(nativemethods.filedescriptora));     nativemethods.filedescriptora fd = (nativemethods.filedescriptora)fdobj;      //get file name of file descriptor , put in array     filenames[fdindex] = fd.cfilename;      //move file descriptor pointer next file descriptor     fdptr = (intptr)((int)fdptr + marshal.sizeof(fd)); }

this works great, except file name coming missing first couple characters. know cause and/or how fix it?

in comments on the codeproject page person mentions same problem - in case offset of array item computed start of structure, not taking account first 32/64 bits contain number of items in array:

[structlayout(layoutkind.sequential, charset = charset.ansi)] public sealed class filegroupdescriptora {     public uint citems;     public filedescriptora[] fgd; }

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