GZipStream問題...

Question

GzipStream 本身不支持分段压缩..
可以先将700M的文件拆分为小文件...然后分别调用GzipStream压缩..

Answer 1

0x1000为一段，压缩和解压，参考如下代码
using System.IO;
using System.IO.Compression;private void button1_Click(object sender, EventArgs e)
{
    FileStream vSourceFileStream = new FileStream(@"c:\temp\temp.bmp", 
        FileMode.Open, FileAccess.Read, FileShare.Read);
    FileStream vDestFileStream = new FileStream(@"c:\temp\temp.zip",
        FileMode.OpenOrCreate, FileAccess.Write);    GZipStream vGZipStream = new GZipStream(vDestFileStream, 
        CompressionMode.Compress, true);
    byte[] vBuffer = new byte[0x1000];
    int vReadLength = vSourceFileStream.Read(vBuffer, 0, vBuffer.Length);
    while (vReadLength > 0)
    {
        vGZipStream.Write(vBuffer, 0, vReadLength);
        vReadLength = vSourceFileStream.Read(vBuffer, 0, vBuffer.Length);
    }
    vGZipStream.Close();
    vSourceFileStream.Close();
    vDestFileStream.Close();
}private void button2_Click(object sender, EventArgs e)
{
    FileStream vSourceFileStream = new FileStream(@"c:\temp\temp.zip",
        FileMode.Open, FileAccess.Read, FileShare.Read);
    FileStream vDestFileStream = new FileStream(@"c:\temp\temp2.bmp",
        FileMode.OpenOrCreate, FileAccess.Write);    GZipStream vGZipStream = new GZipStream(vSourceFileStream,
        CompressionMode.Decompress, true);
    byte[] vBuffer = new byte[0x1000];
    int vReadLength = vGZipStream.Read(vBuffer, 0, vBuffer.Length);
    while (vReadLength > 0)
    {
        vDestFileStream.Write(vBuffer, 0, vReadLength);
        vReadLength = vGZipStream.Read(vBuffer, 0, vBuffer.Length);
    }
    vGZipStream.Close();
    vSourceFileStream.Close();
    vDestFileStream.Close();
}