文件压缩代码(为.Net2.0新增)

System.IO.Compression 命名空间

注意：此命名空间在 .NET Framework 2.0 版中是新增的。

System.IO.Compression 命名空间包含提供基本的流压缩和解压缩服务的类。

压缩字符串

public static string ZipString(string unCompressedString)

{

byte[] bytData = System.Text.Encoding.UTF8.GetBytes(unCompressedString);

MemoryStream ms = new MemoryStream();

Stream s = new GZipStream(ms, CompressionMode.Compress);

s.Write(bytData, 0, bytData.Length);

s.Close();

byte[] compressedData = (byte[])ms.ToArray();

return System.Convert.ToBase64String(compressedData, 0, compressedData.Length);

}

解压缩字符串

public static string UnzipString(string unCompressedString)

{

System.Text.StringBuilder uncompressedString = new System.Text.StringBuilder();

byte[] writeData = new byte[4096];

byte[] bytData = System.Convert.FromBase64String(unCompressedString);

int totalLength = 0;

int size = 0;

Stream s = new GZipStream(new MemoryStream(bytData), CompressionMode.Decompress);

while (true)

{

size = s.Read(writeData, 0, writeData.Length);

if (size > 0)

{

totalLength += size;

uncompressedString.Append(System.Text.Encoding.UTF8.GetString(writeData, 0, size));

}

else

{

break;

}

}

s.Close();

return uncompressedString.ToString();

}

压缩文件

public static bool AddZip(string srcFilename, string zipFileName)