1. 直接返回DataSet對象

特點：通常組件化的處理機制，不加任何修飾及

處理；

優點：代碼精減、易于處理，小數據量處理較快；

缺點：大數據量的傳遞處理慢，消耗網絡資源；

建議：當應用系統在內網、專網（局域網）的應用

時，或外網（廣域網）且數據量在KB級時的

應用時，采用此種模式。

2.返回DataSet對象用Binary序列化后的字節數組

特點：字節數組流的處理模式；

優點：易于處理，可以中文內容起到加密作用；

缺點：大數據量的傳遞處理慢，較消耗網絡資源；

建議：當系統需要進行較大數據交換時采用。

3.返回DataSetSurrogate對象用Binary序列化后的字節數組

特點：微軟提供的開源組件；

下載地址 http://support.microsoft.com/kb/829740/zh-cn

優點：易于處理，可以中文內容起到加密作用；

缺點：大數據量的傳遞處理慢，較消耗網絡資源；

建議：當系統需要傳輸中文數據或需要加密時采用此種方式

4.返回DataSetSurrogate對象用Binary序列化并Zip壓縮后的字節數組

特點：對字節流數組進行壓縮后傳遞；

優點：當數據量大時，性能提高效果明顯，

壓縮比例大；

缺點：相比第三方組件，壓縮比例還有待提高；

建議：當系統需要進行大數據量網絡數據傳遞時，

建議采用此種可靠、高效、免費的方法。

測試用例：SqlServer2000數據庫，數據量大小40000行，

字段數１０個，結果如下：

使用方法	用時(秒）	數據量(Byte)	大小 百分比(%)
直接返回DataSet	12.625	19629414	100%
返回二進制序列化后DataSet	9.712	12049645	61.38%
返回轉化DataSetSurrogate的DataSet并且二進制序列化后	7.943	5138990	26.18%
返回轉化DataSetSurrogate的DataSet并且二進制序列化后使用zip壓縮	7.619	978033	4.98%

源碼:

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 的摘要說明
/// </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對象")]
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對象用Binary序列化后的字節數組")]
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對象用Binary序列化后的字節數組")]
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對象用Binary序列化并ZIP壓縮后的字節數組")]
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;
}
}
}

客戶端調用: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("耗時：{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("耗時：{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("耗時：{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("耗時：{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;
}
}
}
}

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

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