Webservice之Dataset传输[服务端]

using System.IO;
using System.IO.Compression;
using System.Data;
using System.Data.sqlClient;
using System.Runtime.Serialization.Formatters.Binary;

//DataSet
        #region
        [ WebMethod(Description=" 直接返回DataSet对象 ")]
        public  DataSet GetDataSet()
        {
            string sql = "select * from ds_test" ;
            sqlConnection sqlConn = new sqlConnection(@"server=WSH-S1112001\sql2005;uid=sa;pwd=R^c123;database=db_test" );
            sqlConn.open();
            sqlDataAdapter sqlDa = new sqlDataAdapter(sql,sqlConn);
            DataSet ds = new DataSet( "ds_test");
            sqlDa.Fill(ds);
            sqlDa.dispose();
            sqlConn.Close();
            return ds;
        }
        [ WebMethod(Description = " 返回DataSet对象用 Binary序列化后的字节数组")]
        public byte [] GetDataSetBytes()
        {
            DataSet ds = GetDataSet();
            BinaryFormatter ser = new BinaryFormatter();
            MemoryStream ms = new MemoryStream();
            ser.Serialize(ms,ds);
            byte[] buffer = ms.ToArray();
            return buffer;
        }
        [ WebMethod(Description = " 返回DataSetSurrogate对象用 Binary序列化后的字节数组")]
        public byte [] GetDataSetSurrogateBytes()
        {
            DataSet ds = GetDataSet();
            dss. DataSetSurrogate dss = new dss.DataSetSurrogate(ds);
            BinaryFormatter ser = new BinaryFormatter();
            MemoryStream ms = new MemoryStream();
            ser.Serialize(ms,dss);
            byte[] buffer = ms.ToArray();
            return buffer;
        }
        [ 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();
            dss. DataSetSurrogate dss = new dss.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,data.Length);
            zipStream.Close();
            ms.Position = 0;
            byte[] compressed_data=new byte[ms.Length];
            ms.Read(compressed_data,int.Parse(ms.Length.ToString()));
            return compressed_data;
        }
        #endregion