最簡單的重構，你會嗎

　　最近玩Reporting Service報表微軟官方客戶端展現實現中有這麼一段代碼

　　 protected void Page_Load(object sender EventArgs e)

　　 {

　　     if (!IsPostBack)

　　     {

　　         // Get report path from configuration file

　　         Uri serverurl = new Uri(ConfigurationManagerAppSettings[ReportServerUrl]);

　　         string reportsfolder = ConfigurationManagerAppSettings[SampleReportsPath];                                           // folder or site path

　　         string fileextension = (ConfigurationManagerAppSettings[ReportServerMode] == SharePoint ? rdl : StringEmpty);  // extension depending on the report server mode

　　

　　         ReportViewerServerReportReportServerUrl = serverurl;

　　         ReportViewerServerReportReportPath = StringFormat({}/Company Sales {} reportsfolder fileextension);

　　         ReportViewerServerReportReportServerUrl = serverurl;

　　         ReportViewerServerReportReportPath = StringFormat({}/Employee Sales Summary {} reportsfolder fileextension);

　　         ReportViewerServerReportReportServerUrl = serverurl;

　　         ReportViewerServerReportReportPath = StringFormat({}/Product Catalog {} reportsfolder fileextension);

　　         ReportViewerServerReportReportServerUrl = serverurl;

　　         ReportViewerServerReportReportPath = StringFormat({}/Sales Trend {} reportsfolder fileextension);

　　         ReportViewerServerReportReportServerUrl = serverurl;

　　         ReportViewerServerReportReportPath = StringFormat({}/Territory Sales Drilldown {} reportsfolder fileextension);

　　     }

　　 }

　　忍不住手癢一下把它變成

　　 protected void Page_Load(object sender EventArgs e)

　　 {

　　     if (IsPostBack) return;

　　

　　     // Get report path from configuration file

　　     Uri serverurl = new Uri(ConfigurationManagerAppSettings[ReportServerUrl]);

　　     string reportsfolder = ConfigurationManagerAppSettings[SampleReportsPath];

　　

　　     // folder or site path extension depending on the report server mode

　　     string fileextension = (ConfigurationManagerAppSettings[ReportServerMode] == SharePoint ? rdl : StringEmpty);

　　

　　     Action<MicrosoftReportingWebFormsReportViewer string> setReportViewer =

　　         (report reportName) =>

　　         {

　　             reportServerReportReportServerUrl = serverurl;

　　             reportServerReportReportPath = StringFormat({}/{}{} reportsfolder fileextension reportName);

　　         };

　　

　　     setReportViewer(ReportViewer Company Sales );

　　     setReportViewer(ReportViewer Employee Sales Summary );

　　     setReportViewer(ReportViewer Product Catalog );

　　     setReportViewer(ReportViewer Sales Trend );

　　     setReportViewer(ReportViewer Territory Sales Drilldown );

　　 }

　　這個變化有三點

　　１把IsPostBack條件判斷反轉減少一層嵌套

　　把設置ReportViewer的相同邏輯提取出來在一個委托中設置

　　讓注釋與上行代碼隔一行並單獨占一行

　　應該再簡單沒有了吧但是你會嗎？Sorry你一定會但即使你會微軟都不會去做你會去做嗎？

From:http://tw.wingwit.com/Article/program/net/201311/13073.html