以前經常在群裡聽到朋友們說WebServices的性能特別的慢，說的如何如何。說實話，WebServices的確比調用本地數據要慢一些，可是究竟有多慢，真的如朋友們說的那麼難以忍受嗎？我個人感覺，多半原因在處理的方式上。讓我們親自編寫測試代碼，來證明這一切吧。文章由於是我一段時間的總結篇，因此難免參雜個人主觀因素，說的不對的地方，還請多多批評。以下網頁教學網主要從調用WebServices的方法的特點、應用場景、測試結果三個方面來進行下說明分析。
1. 直接返回DataSet對象
2.返回DataSet對象用Binary序列化後的字節數組
3.返回DataSetSurrogate對象用Binary 序列化後的字節數組
4.返回DataSetSurrogate對象用Binary 序列化並Zip壓縮後的字節數組
WebServices的代碼如下：
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 的摘要說明
/// </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對象")]
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對象用Binary序列化後的字節數組")]
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對象用Binary序列化後的字節數組")]
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對象用Binary序列化並ZIP壓縮後的字節數組")]
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;
}
//壓縮壓縮後的字節數組
public byte[] Compress(byte[] data)
{
MemoryStream ms = new MemoryStream();
Stream zipStream = new GZipStream(ms, CompressionMode.Compress, true);
zipStream.Write(data, 0, data.Length);
zipStream.Close();
ms.Position = 0;
byte[] buffer = new byte[ms.Length];
ms.Read(buffer, 0,int.Parse(ms.Length.ToString()));
return buffer;
}
}
}
客戶端調用WebServices的代碼如下：
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對象
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("耗時：{0}毫秒", sw.ElapsedMilliseconds.ToString());
}
//得到DataSet對象用Binary序列化後的字節數組
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("耗時：{1}毫秒；數據大小：{0}", buffer.Length.ToString(), sw.ElapsedMilliseconds.ToString());
}
//得到DataSetSurrogate對象用Binary序列化後的字節數組
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("耗時：{1}毫秒；數據大小：{0}", buffer.Length.ToString(), sw.ElapsedMilliseconds.ToString());
}
//得到DataSetSurrogate對象用Binary序列化並ZIP壓縮後的字節數組
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("耗時：{1}毫秒；數據大小：{0}",zipBuffer.Length.ToString(),sw.ElapsedMilliseconds.ToString());
}
}
}
測試的結果按照先後順序如下圖所示：
關於測試結果的特殊說明，由於測試環境是在本地，數據量也不是很大，測試的結果離實際情況還不是很接近，如果大家有條件的話，可以測試一下，同時希望把測試的結果提供給大家參考。
