第 3 课:从报表服务器加载报表定义
创建项目并从 RDL 架构生成类之后,您就可以从报表服务器加载报表定义。
加载报表定义
在 Report 类的 ReportUpdater 类(如果使用的是 Visual Basic,则为模块)顶部添加私有字段。此字段将用于在应用程序的生存期内维护对从报表服务器加载的报表的引用。
private Report _report;
Private m_report As Report
用以下代码替换 Program.cs 文件(对于 Visual Basic,为 Module1.vb)中 LoadReportDefinition() 方法的代码:
private void LoadReportDefinition() { System.Console.WriteLine("Loading Report Definition"); string reportPath = "/AdventureWorks 2008 Sample Reports/Company Sales 2008"; // Retrieve the report defintion // from the report server byte[] bytes = _reportService.GetItemDefinition(reportPath); if (bytes != null) { XmlSerializer serializer = new XmlSerializer(typeof(Report)); // Load the report bytes into a memory stream using (MemoryStream stream = new MemoryStream(bytes)) { // Deserialize the report stream to an // instance of the Report class _report = (Report)serializer.Deserialize(stream); } } }
Private Sub LoadReportDefinition() System.Console.WriteLine("Loading Report Definition") Dim reportPath As String = _ "/AdventureWorks 2008 Sample Reports/Company Sales 2008" 'Retrieve the report defintion 'from the report server Dim bytes As Byte() = _ m_reportService.GetItemDefinition(reportPath) If Not (bytes Is Nothing) Then Dim serializer As XmlSerializer = _ New XmlSerializer(GetType(Report)) 'Load the report bytes into a memory stream Using stream As MemoryStream = New MemoryStream(bytes) 'Deserialize the report stream to an 'instance of the Report class m_report = CType(serializer.Deserialize(stream), _ Report) End Using End If End Sub