WCF 提高传输数据性能方法 补

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上一篇：WCF提高传输数据性能方法之二 (数据分割)

前面两篇WCF提高传输性能的文章中提到的两个方法是可以合并在一起使用的。
另外补一下传输DataSet的代码

private byte[] buffer = null;
private int bufferSize = 10000;
private long stream_length;

private MemoryStream stream;


private void InitDataSet(DataSet ds)
{
    IFormatter formatter = new BinaryFormatter();
    stream = new MemoryStream();
    formatter.Serialize(stream, ds);
    stream.Position = 0;
    stream_length = stream.Length;         
}
public byte[] GetBuffer()
{
    if (buffer != null)
        return buffer;
    else
        return null;
}

public bool ReadBuffer()
{
    bool exist;
    if (stream_length > 0)
    {
        if (stream_length > bufferSize)
        {
            buffer_currect = new byte[bufferSize];
            stream.Read(buffer, 0, bufferSize);
            stream_length -= bufferSize;
        }
        else
        {
            buffer_currect = new byte[stream_length];
            stream.Read(buffer, 0, (int)stream_length);
            stream_length = 0;
        }
        exist = true;
    }
    else
    {
        exist = false;
    }
    return exist;
}

using (DataClient client = new DataClient())
{
    MemoryStream stream = new MemoryStream();
    byte[] buffer;
    while (client.ReadBuffer())
    {
        buffer = client.GetBuffer();
        stream.Write(buffer, 0, buffer.Length);
    }
    stream.Position = 0;
    IFormatter formatter = new BinaryFormatter();
    DataSet ds = (DataSet)formatter.Deserialize(stream);
    stream.Close();
    client.Close();
    return ds;
}