C#使用GZipStream压缩与解压字符串

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原作者: [db:作者] 来自: [db:来源] 收藏邀请

这里是加压其实很简单，就是将传入的byte数组直接用GZipStream写到一个新的内存流里面去

 public static byte[] Compress(byte[] bytes)
        {
            using (MemoryStream ms = new MemoryStream())
            {
                GZipStream Compress = new GZipStream(ms, CompressionMode.Compress);

                Compress.Write(bytes, 0, bytes.Length);

                Compress.Close();

                return ms.ToArray();

            }
        }

因为我是用的.ne Framwork 4.0 所以GZipStream有CopyTo这个方法，但是4.0以下就没有这个方法。如果4.0以下只有在用一个BinaryReader

在去读取

public static byte[] Decompress(Byte[] bytes)
{
using (MemoryStream tempMs = new MemoryStream())
{
using (MemoryStream ms = new MemoryStream(bytes))
{
GZipStream Decompress = new GZipStream(ms, CompressionMode.Decompress);

Decompress.CopyTo(tempMs);

Decompress.Close();

return tempMs.ToArray();
}
}
}

下面是C#使用GZipStream压缩与解压字符串

using System; 
using System.Text; 
using System.IO; 
using System.IO.Compression; 
using System.Collections.Generic; 

namespace DatabaseUtilLib 
{ 

public class ZipWrapper 
{ 

public static string Compress(string str) 
{ 
//因输入的字符串不是Base64所以转换为Base64,因为HTTP如果不传递Base64则会发生http 400错误 

return Convert.ToBase64String(Compress(Encoding.Default.GetBytes(str))); 
} 

public static string Decompress(string str) 
{ 
return Encoding.Default.GetString(Decompress(Convert.FromBase64String(str))); 
} 

public static byte[] Compress(byte[] bytes) 
{ 
using (MemoryStream ms = new MemoryStream()) 
{ 
GZipStream Compress = new GZipStream(ms, CompressionMode.Compress); 

Compress.Write(bytes, 0, bytes.Length); 

Compress.Close(); 

return ms.ToArray(); 

} 
} 

public static byte[] Decompress(Byte[] bytes) 
{ 
using (MemoryStream tempMs = new MemoryStream()) 
{ 
using (MemoryStream ms = new MemoryStream(bytes)) 
{ 
GZipStream Decompress = new GZipStream(ms, CompressionMode.Decompress); 

Decompress.CopyTo(tempMs); 

Decompress.Close(); 

return tempMs.ToArray(); 
} 
} 
} 
} 
}