WebServices返回数据的4种方法比较
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。 关于测试结果的特殊说明,由于测试环境是在本地,数据量也不是很大,测试的结果离实际情况还不是很接近,如果大家有条件的话,可以测试一下,同时希望把测试的结果提供给大家参考。 最后,为了方便大家,这里还提供了源码下载, 下载地址如下:WebServiceSummary.rar?(点击下载) 关于源代码的特殊说明:笔者这里的开发环境为VS2008中文版sp1+SQLServer2008sp1。数据库为Northwind数据库。 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,sans-serif;text-align:left;color:#444444;text-transform:none;text-indent:0px;letter-spacing:normal;word-spacing:0px;float:none;display:inline !important;orphans:2;widows:2;font-size-adjust:none;font-stretch:normal;background-color:#FFFFFF;-webkit-text-size-adjust:auto;-webkit-text-stroke-width:0px;">????????????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,sans-serif;text-align:left;color:#444444;text-transform:none;text-indent:0px;letter-spacing:normal;word-spacing:0px;float:none;display:inline !important;orphans:2;widows:2;font-size-adjust:none;font-stretch:normal;background-color:#FFFFFF;-webkit-text-size-adjust:auto;-webkit-text-stroke-width:0px;">????????????byte[]?buffer?=?s.GetBytes(); ????????????BinaryFormatter?bf?=?new?BinaryFormatter(); ????????????DataSet?ds?=?bf.Deserialize(new?MemoryStream(buffer))?as?DataSet; ????????????Label2.Text?=?string.Format("耗时:{1}毫秒;数据大小:{0}",?buffer.Length.ToString(),sans-serif;text-align:left;color:#444444;text-transform:none;text-indent:0px;letter-spacing:normal;word-spacing:0px;float:none;display:inline !important;orphans:2;widows:2;font-size-adjust:none;font-stretch:normal;background-color:#FFFFFF;-webkit-text-size-adjust:auto;-webkit-text-stroke-width:0px;">????????//得到DataSetSurrogate对象用Binary序列化后的字节数组 ????????protected?void?Button3_Click(object?sender,sans-serif;text-align:left;color:#444444;text-transform:none;text-indent:0px;letter-spacing:normal;word-spacing:0px;float:none;display:inline !important;orphans:2;widows:2;font-size-adjust:none;font-stretch:normal;background-color:#FFFFFF;-webkit-text-size-adjust:auto;-webkit-text-stroke-width:0px;">????????????byte[]?buffer?=?s.GetDataSetSurrogateBytes(); ????????????DataSetSurrogate?dss?=?bf.Deserialize(new?MemoryStream(buffer))?as?DataSetSurrogate; ????????????DataSet?ds?=?dss.ConvertToDataSet(); ????????????Label3.Text?=?string.Format("耗时:{1}毫秒;数据大小:{0}",sans-serif;text-align:left;color:#444444;text-transform:none;text-indent:0px;letter-spacing:normal;word-spacing:0px;float:none;display:inline !important;orphans:2;widows:2;font-size-adjust:none;font-stretch:normal;background-color:#FFFFFF;-webkit-text-size-adjust:auto;-webkit-text-stroke-width:0px;">????????//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,sans-serif;text-align:left;color:#444444;text-transform:none;text-indent:0px;letter-spacing:normal;word-spacing:0px;float:none;display:inline !important;orphans:2;widows:2;font-size-adjust:none;font-stretch:normal;background-color:#FFFFFF;-webkit-text-size-adjust:auto;-webkit-text-stroke-width:0px;">????????????byte[]?zipBuffer?=?s.GetDataSetSurrogateZipBytes(); ????????????byte[]?buffer?=?UnZip.Decompress(zipBuffer); ????????????Label4.Text?=?string.Format("耗时:{1}毫秒; 数据大小:{0}",zipBuffer.Length.ToString(),sw.ElapsedMilliseconds.ToString()); ????} } using?System.Web.Services; using?Microsoft.Practices.EnterpriseLibrary.Common; using?Microsoft.Practices.EnterpriseLibrary.Data; using?System.IO.Compression; 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(); ????????????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() ????????????DataSetSurrogate?dss?=?new?DataSetSurrogate(ds); ????????[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); ????????????byte[]?Zipbuffer?=?Compress(buffer); ????????????return?Zipbuffer; ????????//压缩压缩后的字节数组 ????????public?byte[]?Compress(byte[]?data) ????????????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,int.Parse(ms.Length.ToString())); 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