GZipstream压缩文件最后四个字节是用来存储原文件大小的?

Question

public static string DecompressString(string base64String)
{
    if (base64String.Length == 0)
    {
        return string.Empty;
    }
    string str = string.Empty;
    try
    {
        byte[] buffer = Convert.FromBase64String(base64String);
        int count = BitConverter.ToInt32(new byte[] { buffer[buffer.Length - 4], buffer[buffer.Length - 3], buffer[buffer.Length - 2], buffer[buffer.Length - 1] }, 0);
        using (MemoryStream stream = new MemoryStream(buffer, 0, buffer.Length))
        {
            using (GZipStream stream2 = new GZipStream(stream, CompressionMode.Decompress))
            {
                byte[] buffer2 = new byte[count];
                stream2.Read(buffer2, 0, count);
                return encode.GetString(buffer2);
            }
        }
    }
    catch
    {
    }
    return str;
}  RT

Answer 1

[color=#FF0000]        int count = BitConverter.ToInt32(new byte[] { buffer[buffer.Length - 4], buffer[buffer.Length - 3], buffer[buffer.Length - 2], buffer[buffer.Length - 1] }, 0);[/color
这行.

Answer 2

是的
楼主看下这个链接
http://blog.csdn.net/downmoon/archive/2006/02/22/606592.aspx

Answer 3

               // Read the footer to determine the length of the destiantion file
                quartetBuffer = new byte[4];
                int position = (int)sourceStream.Length - 4;
                sourceStream.Position = position;
                sourceStream.Read ( quartetBuffer, 0, 4 );
                sourceStream.Position = 0;
                int checkLength = BitConverter.ToInt32 ( quartetBuffer, 0 );