webservice代码部分

[WebMethod(Description="直接返回DataSet对象")]
        public DataSet GetDataSet()
        {
            //http://www.dzbsoft.com  XT_TEXT
            string sql = "select * from XT_TEXT";
            SqlConnection conn = new SqlConnection("Server=60.28.25.58;DataBase=s168593;user id=s168593;password=h0y+FeC*;");
            conn.Open();
            SqlDataAdapter dataAd = new SqlDataAdapter(sql, conn);
            DataSet DS = new DataSet("XT_TEXT");
            dataAd.Fill(DS);
            conn.Close();
            return DS;
        }

//Description 提示的关键字
[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()
        {

            //获取Dataset对象
            DataSet DS = GetDataSet();
            // DataSetSurrogate微软的一个组件（将dataset填充到DataSetSurrogate对象中）
            DataSetSurrogate dss = new DataSetSurrogate(DS);
           //实例化一个二进制对象
            BinaryFormatter ser = new BinaryFormatter();

            //实例化一个内存流对象
            MemoryStream ms = new MemoryStream();
            //将DataSetSurrogate对象序列化，填充到内存流对象中
            ser.Serialize(ms, dss);
            //将字节流转化为数组放到byte数组中
            byte[] buffer = ms.ToArray();

           //将字节zip压缩后放在字节数组中
            byte[] Zipbuffer = Compress(buffer);
            return Zipbuffer;
        }

        public byte[] Compress(byte[] data)
        {

           //实例化一个内存流对象
            MemoryStream ms = new MemoryStream();
           //实例化一个流对象
            Stream zipStream = null;

           //GZipStream提供用于压缩和解压缩流的方法和属性。

           //CompressionMode.Compress表示压缩
            ms创建一个压缩流
            zipStream = new GZipStream(ms, CompressionMode.Compress, true);
           //将data中的字节流写入该流中
            zipStream.Write(data, 0, data.Length);

            ///关闭该流
            zipStream.Close();
           //将内存流的位置指向开  始
            ms.Position = 0;
          //声明一个内存流长度的字节数组
            byte[] compressed_data = new byte[ms.Length];
           //从当前流中读取字节流写入compressed_data 中
            ms.Read(compressed_data, 0, int.Parse(ms.Length.ToString()));
            return compressed_data;
        }

webservice调用的代码

private void button4_Click(object sender, EventArgs e)
        {
           //实例化webservice对象
            com.dzbsoft.www.DataSetService ds = new Test.com.dzbsoft.www.DataSetService();
            DateTime dtBegin = DateTime.Now;
           //  获取webservice返回的序列化并压缩后的字节里数组
            byte[] zipBuffer = ds.GetDataSetSurrogateZipBytes();
           //将字节流数组解压缩
            byte[] buffer = UnZipClass.Decompress(zipBuffer);
            //实例化一个序列化对象
            BinaryFormatter ser = new BinaryFormatter();

         // 获取dataset
            DataSet DS = ds.GetDataSet();

          //  将字节流转化为内存流，然后进行反序列化，最后强制转化为DataSetSurrogate类型
            DataSetSurrogate dss = ser.Deserialize(new MemoryStream(buffer)) as DataSetSurrogate;
           //DataSetSurrogate转化为Dataset对象
            DataSet dataset = dss.ConvertToDataSet();
            this.label4.Text = string.Format("耗时：{0}", DateTime.Now - dtBegin + "          " + zipBuffer.Length.ToString());
           //绑定数据控件
            BindDataSet(DS);
        }