常用WebServices返回数据的4种方法比较
以前經(jīng)常在群里聽(tīng)到朋友們說(shuō)WebServices的性能特別的慢，說(shuō)的如何如何。說(shuō)實(shí)話，WebServices的確比調(diào)用本地?cái)?shù)據(jù)要慢一些，可是究竟有多慢，真的如朋友們說(shuō)的那么難以忍受嗎？我個(gè)人感覺(jué)，多半原因在處理的方式上。讓我們親自編寫測(cè)試代碼，來(lái)證明這一切吧。文章由于是我一段時(shí)間的總結(jié)篇，因此難免參雜個(gè)人主觀因素，說(shuō)的不對(duì)的地方，還請(qǐng)多多批評(píng)。以下我們主要從調(diào)用WebServices的方法的特點(diǎn)、應(yīng)用場(chǎng)景、測(cè)試結(jié)果三個(gè)方面來(lái)進(jìn)行下說(shuō)明分析。
1. 直接返回DataSet對(duì)象
??? 特點(diǎn)：直接返回DataSet對(duì)象。
??? 應(yīng)用場(chǎng)景：1.內(nèi)網(wǎng)。2.外網(wǎng)且數(shù)據(jù)量在kb級(jí)別時(shí)。
2.返回DataSet對(duì)象用Binary序列化后的字節(jié)數(shù)組
? ? 特點(diǎn)：字節(jié)數(shù)組流的處理模式。
? ? 應(yīng)用場(chǎng)景：較大數(shù)據(jù)交換。
3.返回DataSetSurrogate對(duì)象用Binary 序列化后的字節(jié)數(shù)組
? ? 特點(diǎn)：使用微軟提供的開(kāi)源組件進(jìn)行序列化，依然是字節(jié)流的處理模式。詳情請(qǐng)參考：http://support.microsoft.com/kb/829740/zh-cn
? ? 應(yīng)用場(chǎng)景： 較大數(shù)據(jù)交換。
4.返回DataSetSurrogate對(duì)象用Binary 序列化并Zip壓縮后的字節(jié)數(shù)組
? ?? 特點(diǎn)：使用微軟提供的開(kāi)源組件對(duì)字節(jié)流數(shù)組進(jìn)行壓縮后傳遞，依然是字節(jié)流的處理模式。詳情請(qǐng)參考：http://support.microsoft.com/kb/829740/zh-cn
? ?? 應(yīng)用場(chǎng)景：外網(wǎng)環(huán)境需要進(jìn)行大數(shù)據(jù)量網(wǎng)絡(luò)數(shù)據(jù)傳遞時(shí)，建議采用此種方法。也是筆者強(qiáng)烈向大家推薦使用的一種方法。
WebServices的代碼如下：
WebServicesusing?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(shuō)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(duì)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(duì)象用Binary序列化后的字節(jié)數(shù)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(duì)象用Binary序列化后的字節(jié)數(shù)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(duì)象用Binary序列化并ZIP壓縮后的字節(jié)數(shù)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;
????????}
????????//壓縮壓縮后的字節(jié)數(shù)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(diào)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(duì)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(shí)：{0}毫秒",?sw.ElapsedMilliseconds.ToString());
????????}
????????//得到DataSet對(duì)象用Binary序列化后的字節(jié)數(shù)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(shí)：{1}毫秒；數(shù)據(jù)大小：{0}",?buffer.Length.ToString(),?sw.ElapsedMilliseconds.ToString());
????????}
????????//得到DataSetSurrogate對(duì)象用Binary序列化后的字節(jié)數(shù)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(shí)：{1}毫秒；數(shù)據(jù)大小：{0}",?buffer.Length.ToString(),?sw.ElapsedMilliseconds.ToString());
????????}
????????//得到DataSetSurrogate對(duì)象用Binary序列化并ZIP壓縮后的字節(jié)數(shù)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(shí)：{1}毫秒；數(shù)據(jù)大小：{0}",zipBuffer.Length.ToString(),sw.ElapsedMilliseconds.ToString());
????????}
????}
}
?
測(cè)試的結(jié)果按照先后順序如下圖所示：
關(guān)于測(cè)試結(jié)果的特殊說(shuō)明：由于測(cè)試環(huán)境是在本地，數(shù)據(jù)量也不是很大，測(cè)試的結(jié)果離實(shí)際情況還不是很接近，如果大家有條件的話，可以測(cè)試一下，同時(shí)希望把測(cè)試的結(jié)果提供給大家參考。
最后，為了方便大家，這里還提供了源碼下載，下載地址如下：
/Files/wlb/WebServiceSummary.rar?
關(guān)于源代碼的特殊說(shuō)明：筆者這里的開(kāi)發(fā)環(huán)境為VS2008中文版sp1+SQLServer2008sp1。數(shù)據(jù)庫(kù)為Northwind數(shù)據(jù)庫(kù)。
轉(zhuǎn)載于:https://www.cnblogs.com/aaa6818162/archive/2009/08/07/1541058.html
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