Reading a memory stream into byte array

Question

I am having some trouble with reading a memory stream in chunks.

Dim ByteBuffer(4096) As Byte

While ProcessedBytes < FileLength

    BytesRead = MemoryStream.Read(ByteBuffer, 0, 4096)
    'Write the buffer to an output stream
    ProcessedBytes += BytesRead

End While

'MemoryStream.Read(ByteBuffer, 0, 4096)' is always returning zero. I have looked at 'MemoryStream.Length' and the stream definitely has some bytes in it.

Reed Copsey · Accepted Answer · 2012-08-14 16:29:38Z

2

If you're just trying to get the byte[] data out of the MemoryStream, you can call MemoryStream.ToArray():

Dim ByteBuffer() as Byte = MemoryStream.ToArray()

Otherwise, make sure to set your MemoryStream's Position to 0 prior to reading from it.

answered Aug 14, 2012 at 16:29

Reed Copsey

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Comments

ken2k · Accepted Answer · 2012-08-14 16:30:13Z

1

Maybe it returns 0 because you reached the end of the stream. Make sure you set the position to 0 before starting reading your stream.

MemoryStream.Position = 0

or

MemoryStream.Seek(0, SeekOrigin.Begin)

answered Aug 14, 2012 at 16:30

ken2k

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