怎样提高WebService性能大数据量网络传输处理

1.??? 直接返回DataSet对象?

特点：通常组件化的处理机制，不加任何修饰及

??????????? 处理；

优点：代码精减、易于处理，小数据量处理较快；

缺点：大数据量的传递处理慢，消耗网络资源；

建议：当应用系统在内网、专网（局域网）的应用

??????????? 时，或外网（广域网）且数据量在KB级时的

??????????? 应用时，采用此种模式。

2.返回DataSet对象用Binary序列化后的字节数组?

特点：字节数组流的处理模式；

优点：易于处理，可以中文内容起到加密作用；

缺点：大数据量的传递处理慢，较消耗网络资源；

建议：当系统需要进行较大数据交换时采用。

3.返回DataSetSurrogate对象用Binary序列化后的字节数组?

特点：微软提供的开源组件；

???????????????? 下载地址 http://support.microsoft.com/kb/829740/zh-cn

优点：易于处理，可以中文内容起到加密作用；

缺点：大数据量的传递处理慢，较消耗网络资源；

建议：当系统需要传输中文数据或需要加密时采用此种方式

4.返回DataSetSurrogate对象用Binary序列化并Zip压缩后的字节数组

特点：对字节流数组进行压缩后传递；

优点：当数据量大时，性能提高效果明显，

???????????? 压缩比例大；

缺点：相比第三方组件，压缩比例还有待提高；

建议：当系统需要进行大数据量网络数据传递时，

???????????? 建议采用此种可靠、高效、免费的方法。?

测试用例：SqlServer2000数据库，数据量大小40000行，

字段数１０个，结果如下：

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源码:

using System;
using System.Data;
using System.Web;
using System.Collections;
using System.Web.Services;
using System.Web.Services.Protocols;
using System.ComponentModel;

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

namespace DataSetWebService
{
??? /// <summary>
??? /// Service1 的摘要说明
??? /// </summary>
??? [WebService(Namespace = "http://tempuri.org/")]
??? [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
??? [ToolboxItem(false)]
??? public class DataSetService : System.Web.Services.WebService
??? {

??????? [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;
??????? }

??????? [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;
??????? }

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??????? [WebMethod(Description = "返回DataSetSurrogate对象用Binary序列化后的字节数组")]
??????? public byte[] GetDataSetSurrogateBytes()
??????? {
??????????? DataSet DS = GetDataSet();
??????????? DataSetSurrogate dss = new 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();
??????????? 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,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;
??????? }
??? }
}

客户端调用:C/S

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

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

namespace Test
{
??? public partial class Form1 : Form
??? {
??????? public Form1()
??????? {
??????????? InitializeComponent();
??????? }

??????? private void BindDataSet(DataSet DS)
??????? {
??????????? this.dataGridView1.DataSource = DS.Tables[0];
??????? }

??????? private void button1_Click(object sender,EventArgs e)
??????? {
??????????? com.dzbsoft.www.DataSetService ds = new Test.com.dzbsoft.www.DataSetService();
??????????? DateTime dtBegin = DateTime.Now;
??????????? DataSet DS = ds.GetDataSet();
??????????? this.label1.Text = string.Format("耗时：{0}",DateTime.Now - dtBegin);
??????????? BindDataSet(DS);
??????? }

??????? private void button2_Click(object sender,EventArgs e)
??????? {
??????????? com.dzbsoft.www.DataSetService ds = new Test.com.dzbsoft.www.DataSetService();
??????????? DateTime dtBegin = DateTime.Now;
??????????? byte[] buffer = ds.GetDataSetBytes();
??????????? DataSet DS = ds.GetDataSet();
??????????? BinaryFormatter ser = new BinaryFormatter();
??????????? DataSet dataset = ser.Deserialize(new MemoryStream(buffer)) as DataSet;
??????????? this.label2.Text = string.Format("耗时：{0}",DateTime.Now - dtBegin + "????????? " + buffer.Length.ToString());
??????????? BindDataSet(DS);
??????? }

??????? private void button3_Click(object sender,EventArgs e)
??????? {
??????????? com.dzbsoft.www.DataSetService ds = new Test.com.dzbsoft.www.DataSetService();
??????????? DateTime dtBegin = DateTime.Now;
??????????? byte[] buffer = ds.GetDataSetSurrogateBytes();
??????????? BinaryFormatter ser = new BinaryFormatter();
??????????? DataSet DS = ds.GetDataSet();
??????????? DataSetSurrogate dss = ser.Deserialize(new MemoryStream(buffer)) as DataSetSurrogate;
??????????? DataSet dataset = dss.ConvertToDataSet();
??????????? this.label3.Text = string.Format("耗时：{0}",DateTime.Now - dtBegin + "????????? " + buffer.Length.ToString());
??????????? BindDataSet(DS);
??????? }

??????? private void button4_Click(object sender,EventArgs e)
??????? {
??????????? com.dzbsoft.www.DataSetService ds = new Test.com.dzbsoft.www.DataSetService();
??????????? DateTime dtBegin = DateTime.Now;
??????????? 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();
??????????? this.label4.Text = string.Format("耗时：{0}",DateTime.Now - dtBegin + "????????? " + zipBuffer.Length.ToString());
??????????? BindDataSet(DS);
??????? }

??? }
}

UnZipClass.cs

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

namespace Test
{
??? public static class UnZipClass
??? {
??????? /// <summary>
??????? /// Decompresses the specified data.
??????? /// </summary>
??????? /// <param name="data">The data.</param>
??????? /// <returns></returns>
??????? 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;
??????????? }
??????? }

??????? public static byte[] EtractBytesFormStream(Stream zipStream,int dataBlock)
??????? {
??????????? try
??????????? {
??????????????? byte[] data = null;
??????????????? int totalBytesRead = 0;
??????????????? while (true)
??????????????? {
??????????????????? Array.Resize(ref data,totalBytesRead + dataBlock + 1);
??????????????????? int bytesRead = zipStream.Read(data,totalBytesRead,dataBlock);
??????????????????? if (bytesRead == 0)
??????????????????? {
??????????????????????? break;
??????????????????? }
??????????????????? totalBytesRead += bytesRead;
??????????????? }
??????????????? Array.Resize(ref data,totalBytesRead);
??????????????? return data;
??????????? }
??????????? catch
??????????? {
??????????????? return null;
??????????? }
??????? }
??? }
}

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转自：http://hbluojiahui.blog.163.com/blog/static/310647672009491142070/