WCF大数据量传输解决方案

 文章内容列表:
1． 场景：
2． 解决方案
3. WCF契约与服务实现设计静态图
4. WCF契约与服务实现设计详细说明
6. 服务端启动服务代码:
7. 客户端代码

8. WCF大数据量传输解决方案源码下载

1． 场景：

WCF在网络传输中，大数据量传输造成网络阻塞，宽带无法承受；

2． 解决方案

解决WCF在网络传输中的大数据量问题：

A．需要把相关数据序列化成字节流，再对字节流进行压缩，再进行传输，到了客户端再做反向操作便可获得原始数据。

B．如果压缩后的数据仍然较大时，可以再压缩流后，再对流进行拆分即可。

(解决方案A图)

(解决方案2)

3. WCF契约与服务实现设计静态图

4. WCF契约与服务实现设计详细说明

5. WCF契约与服务代码实现:
契约代码

using System;using System.Collections.Generic;using System.Linq;using System.Runtime.Serialization;using System.ServiceModel;using System.Text;///日期：2008-04-16///作者：旋风///来自：http://cnblogs.com/xuanfengnamespace WCFDataTransfers{    [ServiceContract(Namespace = "http://DataTransfers/Demao")]    public interface IDataTransfers    {          /// <summary>        /// 获取所用压缩后字节流        /// </summary>        /// <returns></returns>        [OperationContract]        byte[] GetAllBuffer();        /// <summary>        /// 设置压缩后字节流分块，每一块的大小        /// </summary>        /// <param name="length"></param>        [OperationContract]        void SetBufferLength(int length);        /// <summary>        /// 读取压缩后字节流一块，并提升字节流的位置        /// </summary>        /// <returns></returns>        [OperationContract]        bool ReadNextBuffer();        /// <summary>        /// 获取当前块的字节流        /// </summary>        /// <returns></returns>        [OperationContract]        byte[] GetCurrentBuffer();                  }   }

实现契约服务代码

using System;using System.Data;using System.Runtime.Serialization;using System.Runtime.Serialization.Formatters.Binary;using System.IO;using System.IO.Compression;using System.Collections.Generic;using System.Linq;using System.ServiceModel;using System.Text;///日期：2008-04-16///作者：旋风///来自：http://cnblogs.com/xuanfengnamespace WCFDataTransfers{        public class DataTransfers :IDataTransfers    {        /// <summary>        /// 无参数构造函数        /// </summary>        public DataTransfers()        {            InitBuffers(InitTestDataSet());        }        private byte[] buffer_all = null;        private byte[] buffer_currect = null;        private int  get_buffer_length = 1000;        private long  remain_length;        private MemoryStream stream;        /// <summary>        /// 生成一个测试的数据集        /// </summary>        /// <returns></returns>        private DataSet InitTestDataSet()        {            DataSet ds = new DataSet("test");            DataTable table = new DataTable("test");            DataColumn column = new DataColumn("test");            column.DataType = Type.GetType("System.String");            table.Columns.Add(column);            DataRow row;            for (int i = 0; i < 100000;i++ )            {                row = table.NewRow();                row["test"] = "测试数据 !";                table.Rows.Add(row);            }            ds.Tables.Add(table);            return ds;                }        /// <summary>        /// 初始化压缩字节流        /// </summary>        /// <param name="ds"></param>       private void InitBuffers(DataSet ds)       {                            IFormatter formatter = new BinaryFormatter();                MemoryStream stream_ = new MemoryStream();                formatter.Serialize(stream_, ds);                buffer_all = stream_.ToArray();                stream_.Close();                byte[] bytes_c = Compression(buffer_all, CompressionMode.Compress);                stream = new MemoryStream(bytes_c);                stream.Position = 0;                remain_length = stream.Length;                    }        /// <summary>        /// 提供内部使用压缩字流的方法        /// </summary>        /// <param name="data"></param>        /// <param name="mode"></param>        /// <returns></returns>        private  byte[] Compression(byte[] data, CompressionMode mode)       {           DeflateStream zip = null;            try            {                if (mode == CompressionMode.Compress)                {                    MemoryStream ms = new MemoryStream();                    zip = new DeflateStream(ms, mode, true);                    zip.Write(data, 0, data.Length);                    zip.Close();                    return ms.ToArray();                }                else                {                    MemoryStream ms = new MemoryStream();                    ms.Write(data, 0, data.Length);                    ms.Flush();                    ms.Position = 0;                    zip = new DeflateStream(ms, mode, true);                    MemoryStream os = new MemoryStream();                    int SIZE = 1024;                    byte[] buf = new byte[SIZE];                    int l = 0;                    do                    {                        l = zip.Read(buf, 0, SIZE);                        if (l == 0) l = zip.Read(buf, 0, SIZE);                        os.Write(buf, 0, l);                    } while (l != 0);                    zip.Close();                    return os.ToArray();                }            }            catch            {                if (zip != null) zip.Close();                return null;            }            finally            {                if (zip != null) zip.Close();            }        }        IDataTransfers 成员    }}

6. 服务端启动服务代码:

static void Main(string[] args)        {            ServiceHost host = new ServiceHost(typeof(DataTransfers));            Console.Write("服务中");            Console.Read();            Console.Read();        }

7. 客户端代码

//实例化WCF客户端            DataTransfersClient client = new DataTransfersClient();            MemoryStream stream = new MemoryStream();           byte[] buffer;            //获取所用块压缩流，并组装            while(client.ReadNextBuffer())             {                buffer = client.GetCurrentBuffer();                stream.Write(buffer,0,buffer.Length);            }            stream.Position = 0;            buffer= new byte[stream.Length] ;            stream.Read(buffer,0,buffer.Length);            stream.Close();            //解压压缩流            byte[] bytes = Compression(buffer,CompressionMode.Decompress);            stream = new MemoryStream(bytes);            IFormatter formatter = new BinaryFormatter();            //反序列化            DataSet ds=(DataSet) formatter.Deserialize(stream);            stream.Close();            this.dataGridView1.DataSource = ds;            this.dataGridView1.DataMember="test";            this.label1.Text = ds.Tables[0].Rows.Count.ToString();            client.Close();

8.
WCF大数据量传输解决方案源码下载