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  1. PO
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    <p>Something like this:</p> <pre><code>class ChunkedMemoryStream : Stream { private readonly List&lt;byte[]&gt; _chunks = new List&lt;byte[]&gt;(); private int _positionChunk; private int _positionOffset; private long _position; public override bool CanRead { get { return true; } } public override bool CanSeek { get { return true; } } public override bool CanWrite { get { return true; } } public override void Flush() { } public override long Length { get { return _chunks.Sum(c =&gt; c.Length); } } public override long Position { get { return _position; } set { _position = value; _positionChunk = 0; while (_positionOffset != 0) { if (_positionChunk &gt;= _chunks.Count) throw new OverflowException(); if (_positionOffset &lt; _chunks[_positionChunk].Length) return; _positionOffset -= _chunks[_positionChunk].Length; _positionChunk++; } } } public override int Read(byte[] buffer, int offset, int count) { int result = 0; while ((count != 0) &amp;&amp; (_positionChunk != _chunks.Count)) { int fromChunk = Math.Min(count, _chunks[_positionChunk].Length - _positionOffset); if (fromChunk != 0) { Array.Copy(_chunks[_positionChunk], _positionOffset, buffer, offset, fromChunk); offset += fromChunk; count -= fromChunk; result += fromChunk; _position += fromChunk; } _positionOffset = 0; _positionChunk++; } return result; } public override long Seek(long offset, SeekOrigin origin) { long newPos = 0; switch (origin) { case SeekOrigin.Begin: newPos = offset; break; case SeekOrigin.Current: newPos = Position + offset; break; case SeekOrigin.End: newPos = Length - offset; break; } Position = Math.Max(0, Math.Min(newPos, Length)); return newPos; } public override void SetLength(long value) { throw new NotImplementedException(); } public override void Write(byte[] buffer, int offset, int count) { while ((count != 0) &amp;&amp; (_positionChunk != _chunks.Count)) { int toChunk = Math.Min(count, _chunks[_positionChunk].Length - _positionOffset); if (toChunk != 0) { Array.Copy(buffer, offset, _chunks[_positionChunk], _positionOffset, toChunk); offset += toChunk; count -= toChunk; _position += toChunk; } _positionOffset = 0; _positionChunk++; } if (count != 0) { byte[] chunk = new byte[count]; Array.Copy(buffer, offset, chunk, 0, count); _chunks.Add(chunk); _positionChunk = _chunks.Count; _position += count; } } } class Program { static void Main(string[] args) { ChunkedMemoryStream cms = new ChunkedMemoryStream(); Debug.Assert(cms.Length == 0); Debug.Assert(cms.Position == 0); cms.Position = 0; byte[] helloworld = Encoding.UTF8.GetBytes("hello world"); cms.Write(helloworld, 0, 3); cms.Write(helloworld, 3, 3); cms.Write(helloworld, 6, 5); Debug.Assert(cms.Length == 11); Debug.Assert(cms.Position == 11); cms.Position = 0; byte[] b = new byte[20]; cms.Read(b, 3, (int)cms.Length); Debug.Assert(b.Skip(3).Take(11).SequenceEqual(helloworld)); cms.Position = 0; cms.Write(Encoding.UTF8.GetBytes("seeya"), 0, 5); Debug.Assert(cms.Length == 11); Debug.Assert(cms.Position == 5); cms.Position = 0; cms.Read(b, 0, (byte) cms.Length); Debug.Assert(b.Take(11).SequenceEqual(Encoding.UTF8.GetBytes("seeya world"))); Debug.Assert(cms.Length == 11); Debug.Assert(cms.Position == 11); cms.Write(Encoding.UTF8.GetBytes(" again"), 0, 6); Debug.Assert(cms.Length == 17); Debug.Assert(cms.Position == 17); cms.Position = 0; cms.Read(b, 0, (byte)cms.Length); Debug.Assert(b.Take(17).SequenceEqual(Encoding.UTF8.GetBytes("seeya world again"))); } } </code></pre>
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    1. PO"Chunked" MemoryStream
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      1. PTQuestion
    1. PTAnswer
    1. This table or related slice is empty.
    1. USDaniel Earwicker
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. VO
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      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
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      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
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      1. This table or related slice is empty.
      1. VTUpMod
    1. CO+1 - Very clean implementation.
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      1. USM.Babcock
 

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