public override byte[] ReadStream(string name)
{
UCOMIStream stream1;
STATSTG statstg1;
if (this.Disposed)
{
throw new ObjectDisposedException("UnmanagedStorage");
}
OLE_MODE ole_mode1 = OLE_MODE.STGM_SHARE_EXCLUSIVE | OLE_MODE.STGM_READWRITE;
try
{
this.storage.OpenStream(name, IntPtr.Zero, (uint)ole_mode1, 0, out stream1);
}
catch (COMException)
{
throw new Exception("Provided file is not a valid BIFF8 file. Only XLS files from Excel 97 and on are supported.");
}
if (stream1 == null)
{
throw new Exception("Can't open OLE2 stream.");
}
stream1.Stat(out statstg1, 1);
byte[] buffer1 = new byte[statstg1.cbSize];
GCHandle handle1 = GCHandle.Alloc(buffer1, GCHandleType.Pinned);
stream1.Read(buffer1, (int)statstg1.cbSize, IntPtr.Zero);
handle1.Free();
return(buffer1);
}
public override void WriteStream(string name, byte[] buffer)
{
UCOMIStream stream1;
if (this.Disposed)
{
throw new ObjectDisposedException("UnmanagedStorage");
}
OLE_MODE ole_mode1 = OLE_MODE.STGM_SHARE_EXCLUSIVE | OLE_MODE.STGM_READWRITE;
this.storage.CreateStream(name, (uint)ole_mode1, 0, 0, out stream1);
if (stream1 == null)
{
throw new Exception("Can't create OLE2 stream.");
}
GCHandle handle1 = GCHandle.Alloc(buffer, GCHandleType.Pinned);
stream1.Write(buffer, buffer.Length, IntPtr.Zero);
handle1.Free();
stream1.Commit(0);
Marshal.ReleaseComObject(stream1);
}