以前经常在群里听到朋友们说WebServices的
性能特别的慢，说的如何如何。说实话，WebServices的确比调用本地数据要慢一些，可是究竟有多慢，真的如朋友们说的那么难以忍受吗？我个人感觉，多半原因在处理的方式上。让我们亲自编写
测试代码，来证明这一切吧。文章由于是我一段时间的总结篇，因此难免参杂个人主观因素，说的不对的地方，还请多多批评。以下我们主要从调用WebServices的方法的特点、应用场景、测试结果三个方面来进行下说明分析。
1. 直接返回DataSet对象
? ? 特点：直接返回DataSet对象。
? ? 应用场景：1.内网。2.外网且数据量在kb级别时。
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。
? ? 应用场景：较大数据交换。
3.返回DataSetSurrogate对象用Binary 序列化后的字节数组
? ? 特点：使用微软提供的
开源
组件进行序列化，依然是字节流的处理模式。详情请参考：
http://support.microsoft.com/kb/829740/zh-cn
? ? 应用场景： 较大数据交换。
4.返回DataSetSurrogate对象用Binary 序列化并Zip压缩后的字节数组
? ? 特点：使用微软提供的开源组件对字节流数组进行压缩后传递，依然是字节流的处理模式。详情请参考：
http://support.microsoft.com/kb/829740/zh-cn
? ? 应用场景：外网环境需要进行大数据量网络数据传递时，建议采用此种方法。也是笔者强烈向大家推荐使用的一种方法。
WebServices的代码如下：
WebServices
using System;
using System.Collections.Generic;
using System.Web;
using System.Web.Services;
using System.Data;
using Microsoft.Practices.EnterpriseLibrary.Common;
using Microsoft.Practices.EnterpriseLibrary.Data;
using System.IO;
using System.IO.Compression;
using System.Runtime.Serialization.Formatters.Binary;
namespace WebService1
{
/// <summary>
/// Service1 的摘要说明
/// </summary>
[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
[System.ComponentModel.ToolboxItem(false)]
public class Service1 : System.Web.Services.WebService
{
[WebMethod(Description="直接返回DataSet对象")]
public DataSet GetDataSet()
{
string sql = "select * from Customers";
Database db = DatabaseFactory.CreateDatabase();
DataSet ds = db.ExecuteDataSet(CommandType.Text,sql);
return ds;
}
[WebMethod(Description = "返回DataSet对象用Binary序列化后的字节数组")]
public byte[] GetBytes()
{
DataSet ds = GetDataSet();
BinaryFormatter bf = new BinaryFormatter();
MemoryStream ms = new MemoryStream();
bf.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 bf = new BinaryFormatter();
MemoryStream ms = new MemoryStream();
bf.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 bf = new BinaryFormatter();
MemoryStream ms = new MemoryStream();
bf.Serialize(ms,dss);
byte[] buffer = ms.ToArray();
byte[] Zipbuffer = Compress(buffer);
return Zipbuffer;
}
//压缩压缩后的字节数组
public byte[] Compress(byte[] data)
{
MemoryStream ms = new MemoryStream();
Stream zipStream = new GZipStream(ms,CompressionMode.Compress,true);
zipStream.Write(data,data.Length);
zipStream.Close();
ms.Position = 0;
byte[] buffer = new byte[ms.Length];
ms.Read(buffer,int.Parse(ms.Length.ToString()));
return buffer;
}
}
}
客户端调用WebServices的代码如下：
客户端调用WebServices
using System;
using System.Collections.Generic;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using WebServicesClient.localhost;
using System.Data;
using System.Runtime.Serialization.Formatters.Binary;
using System.IO;
using System.Diagnostics;
namespace WebServicesClient
{
public partial class _Default : System.Web.UI.Page
{
Service1 s = new Service1();
protected void Page_Load(object sender,EventArgs e)
{
}
//直接返回DataSet对象
protected void Button1_Click(object sender,EventArgs e)
{
Stopwatch sw = new Stopwatch();
sw.Start();
DataSet ds = s.GetDataSet();
GridView1.DataSource = ds.Tables[0].DefaultView;
GridView1.DataBind();
sw.Stop();
Label1.Text = string.Format("耗时：{0}毫秒",sw.ElapsedMilliseconds.ToString());
}
//得到DataSet对象用Binary序列化后的字节数组
protected void Button2_Click(object sender,EventArgs e)
{
Stopwatch sw = new Stopwatch();
sw.Start();
byte[] buffer = s.GetBytes();
BinaryFormatter bf = new BinaryFormatter();
DataSet ds = bf.Deserialize(new MemoryStream(buffer)) as DataSet;
GridView1.DataSource = ds.Tables[0].DefaultView;
GridView1.DataBind();
sw.Stop();
Label2.Text = string.Format("耗时：{1}毫秒；数据大小：{0}",buffer.Length.ToString(),sw.ElapsedMilliseconds.ToString());
}
//得到DataSetSurrogate对象用Binary序列化后的字节数组
protected void Button3_Click(object sender,EventArgs e)
{
Stopwatch sw = new Stopwatch();
sw.Start();
byte[] buffer = s.GetDataSetSurrogateBytes();
BinaryFormatter bf = new BinaryFormatter();
DataSetSurrogate dss = bf.Deserialize(new MemoryStream(buffer)) as DataSetSurrogate;
DataSet ds = dss.ConvertToDataSet();
GridView1.DataSource = ds.Tables[0].DefaultView;
GridView1.DataBind();
sw.Stop();
Label3.Text = string.Format("耗时：{1}毫秒；数据大小：{0}",sw.ElapsedMilliseconds.ToString());
}
//得到DataSetSurrogate对象用Binary序列化并ZIP压缩后的字节数组
protected void Button4_Click(object sender,EventArgs e)
{
Stopwatch sw = new Stopwatch();
sw.Start();
byte[] zipBuffer = s.GetDataSetSurrogateZipBytes();
byte[] buffer = UnZip.Decompress(zipBuffer);
BinaryFormatter bf = new BinaryFormatter();
DataSetSurrogate dss = bf.Deserialize(new MemoryStream(buffer)) as DataSetSurrogate;
DataSet ds = dss.ConvertToDataSet();
GridView1.DataSource = ds.Tables[0].DefaultView;
GridView1.DataBind();
sw.Stop();
Label4.Text = string.Format("耗时：{1}毫秒；数据大小：{0}",zipBuffer.Length.ToString(),sw.ElapsedMilliseconds.ToString());
}
}
}
