Lektion 4: Programmgesteuertes Aktualisieren der Berichtsdefinition

Ersetzen Sie den Code für die UpdateReportDefinition()-Methode in der Datei Program.cs (Module1.vb für Visual Basic) durch folgenden Code:

private void UpdateReportDefinition()
{
    System.Console.WriteLine("Updating Report Definition");

    // Create a list of the Items Choices for the Report. The 
    // ItemsChoiceType80 enum represents all the properties
    // available in the report and the ItemsElementName 
    // represents the properties that exist in the current 
    // instance of the report.
    List<ItemsChoiceType80> _reportItems = 
        new List<ItemsChoiceType80>(_report.ItemsElementName);

    // Locate the index for the Description property
    int index = _reportItems.IndexOf(
        ItemsChoiceType80.Description);

    // The Description item is of type StringLocIDType, so 
    // cast the item type first and then assign new value.
    System.Console.WriteLine("- Old Description: " + 
        ((StringLocIDType)_report.Items[index]).Value );

    // Update the Description for the Report
    ((StringLocIDType)_report.Items[index]).Value = 
        "New Report Description";

    System.Console.WriteLine("- New Description: " + 
        ((StringLocIDType)_report.Items[index]).Value );
}

Private Sub UpdateReportDefinition()

    System.Console.WriteLine("Updating Report Definition")

    'Create a list of the Items Choices for the Report. The 
    'ItemsChoiceType80 enum represents all the properties
    'available in the report and the ItemsElementName 
    'represents the properties that exist in the current 
    'instance of the report.
    Dim reportItems As List(Of ItemsChoiceType80) = _
        New List(Of ItemsChoiceType80)(m_report.ItemsElementName)

    'Locate the index for the Description property
    Dim index As Integer = _
        reportItems.IndexOf(ItemsChoiceType80.Description)

    'The Description item is of type StringLocIDType, so 
    'cast the item type first and then assign new value.
    System.Console.WriteLine("- Old Description: " & _
        DirectCast(m_report.Items(index), StringLocIDType).Value)

    'Update the Description for the Report
    DirectCast(m_report.Items(index), StringLocIDType).Value = _
        "New Report Description"

    System.Console.WriteLine("- New Description: " & _
        DirectCast(m_report.Items(index), StringLocIDType).Value)

End Sub