WebService压缩问题

matthew2000 2008-12-26 06:05:05

WebService如何进行压缩传输和接收？客户端每次发送100K大小的数据，服务器接收并存入数据库，怎样实现压缩？最好有例子。

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zzuyongp 2009-02-17

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恩，留个记号。。。这方面对传送较大的数据有用

tianwei262 2009-01-12

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接２楼的调用部分
//webservices引用
TestWebService ds = new TestWebService();
byte[] zipBuffer = ds.GetDataSetSurrogateZipBytes();
byte[] buffer = UnZipClass.Decompress(zipBuffer);
BinaryFormatter ser = new BinaryFormatter();
DataSet DS = ds.GetDataSet();
DataSetSurrogate dss = ser.Deserialize(new MemoryStream(buffer)) as DataSetSurrogate;
DataSet dataset = dss.ConvertToDataSet();

public static byte[] Decompress(byte[] data)
{
try
{
MemoryStream ms = new MemoryStream(data);
Stream zipStream = null;
zipStream = new GZipStream(ms, CompressionMode.Decompress);
byte[] dc_data = null;
dc_data = EtractBytesFormStream(zipStream, data.Length);
return dc_data;
}
catch
{
return null;
}
}

yangxinglouis 2009-01-07

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2楼的方法很好
通过这样压缩的比例可以达到90%几
同时注意接收数据后要解压缩并反序列化后才能得到正确结果

claymore1114 2008-12-27

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[WebMethod(Description = "返回DataSetSurrogate对象用Binary序列化并ZIP压缩后的字节数组")]

        public byte[] GetDataSetSurrogateZipBytes()

        {

            DataSet DS = GetDataSet();

            DataSetSurrogate dss = new DataSetSurrogate(DS);

            BinaryFormatter ser = new BinaryFormatter();

            MemoryStream ms = new MemoryStream();

            ser.Serialize(ms, dss);

            byte[] buffer = ms.ToArray();

            byte[] Zipbuffer = Compress(buffer);

            return Zipbuffer;

        }



        public byte[] Compress(byte[] data)

        {

            MemoryStream ms = new MemoryStream();

            Stream zipStream = null;

            zipStream = new GZipStream(ms, CompressionMode.Compress, true);

            zipStream.Write(data, 0, data.Length);

            zipStream.Close();

            ms.Position = 0;

            byte[] compressed_data = new byte[ms.Length];

            ms.Read(compressed_data, 0, int.Parse(ms.Length.ToString()));

            return compressed_data;

        }

magicam 2008-12-27

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       public byte[] Compress( byte[] data )//压缩二进制数据

        {

            MemoryStream ms = new MemoryStream();

            Stream zipStream = null;

            zipStream = new GZipStream( ms, CompressionMode.Compress, true );

            zipStream.Write( data, 0, data.Length );

            zipStream.Close();



            ms.Position = 0;

            byte[] Compress_data = new byte[ms.Length];

            ms.Read( Compress_data, 0, int.Parse( ms.Length.ToString() ) );

            return Compress_data;

        }