怎样提高WebService性能大数据量网络传输处理(转)

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：

使用方法

用时(秒）

数据量(Byte)

大小

百分比(%)

直接返回DataSet

12.625

19629414

100%

返回二进制序列化后DataSet

9.712

12049645

61.38%

返回转化DataSetSurrogate的DataSet并且二进制序列化后

7.943

5138990

26.18%

返回转化DataSetSurrogate的DataSet并且二进制序列化后使用zip压缩

7.619

978033

4.98%

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;
}

[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, 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;
}
}
}

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;
}
}
}
}