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；
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
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；
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,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;
}
}
}
}
转自：http://hbluojiahui.blog.163.com/blog/static/310647672009491142070/
版权声明：本文内容由互联网用户自发贡献，该文观点与技术仅代表作者本人。本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。如发现本站有涉嫌侵权/违法违规的内容， 请发送邮件至 [email protected] 举报，一经查实，本站将立刻删除。
