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第 3 課：從報表伺服器載入報表定義

在您建立專案並從 RDL 結構描述產生類別之後，就可以開始從報表伺服器載入報表定義。

載入報表定義

  1. 在 Report 類別之 ReportUpdater 類別 (如果使用 Visual Basic 則為模組) 的頂端加入一個私用欄位。此欄位將用來在應用程式使用期間，維護從報表伺服器載入的報表參考。

    private Report _report;

    Private m_report As Report

  2. 以下列程式碼取代 Program.cs 檔案 (在 Visual Basic 中為 Module1.vb) 中 LoadReportDefinition() 方法的程式碼：

    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

下一課

在下一課，您將撰寫程式碼，更新從報表伺服器載入的報表定義。請參閱＜第 4 課：以程式設計方式更新報表定義＞。