TopBottomNSortField 類別

可讓您取得並設定前 N 項與後 N 項排序欄位的選項。

如需這個類型所有成員的清單，請參閱 TopBottomSortField 成員。

Object

   SortField

      TopBottomNSortField

[Visual Basic]

Public Class TopBottomNSortField
   Inherits SortField

[C#]

public class TopBottomNSortField : SortField

[C++]

__gc public class TopBottomNSortField : public SortField

[VJ#]

public class TopBottomNSortField extends SortField

註解

透過 SortFields 集合的 Item 屬性依索引來擷取 SortField 物件，並將 SortField 物件轉換為 TopBottomNSortField 物件。

範例

下列範例會傳回 TopBottomNSortField 物件。

[Visual Basic]

Private Function GetTopBottomNSortField _
(ByVal sortFieldIndex As Integer) As TopBottomNSortField
   Dim topBottomNSortField As TopBottomNSortField

   ' 依索引取得 SortField 物件，將之轉換為 
   '  TopBottomNSortField 物件，然後將它傳回來。
   If TypeOf _
   (Report.DataDefinition.SortFields.Item(sortFieldIndex)) _
   Is TopBottomNSortField Then
      topBottomNSortField = _
      Report.DataDefinition.SortFields.Item(sortFieldIndex)
      GetTopBottomNSortField = topBottomNSortField
   Else : GetTopBottomNSortField = Nothing
   End If
End Function 

[C#]

private TopBottomNSortField GetTopBottomNSortField
(int sortFieldIndex)
{
   TopBottomNSortField topBottomNSortField;

   // 依索引取得 SortField 物件，將之轉換為 
   //  TopBottomNSortField 物件，然後將它傳回來。
   topBottomNSortField = 
   Report.DataDefinition.SortFields[sortFieldIndex] 
   as TopBottomNSortField;
   if (topBottomNSortField != null) return topBottomNSortField;
   else return null;
} 

[C++]

TopBottomNSortField* GetTopBottomNSortField
(int sortFieldIndex)
{
   TopBottomNSortField* topBottomNSortField;

   try
   {
      // 依索引取得 SortField 物件，將之轉換為 
      //  TopBottomNSortField 物件，然後將它傳回來。
      topBottomNSortField = __try_cast<TopBottomNSortField*>
      (Report->DataDefinition->SortFields->Item[sortFieldIndex]);
      return topBottomNSortField;
   }
   catch(System::InvalidCastException*)
   {
      return 0;
   }
};

[VJ#]

private TopBottomNSortField GetTopBottomNSortField
(int sortFieldIndex)
{
   TopBottomNSortField topBottomNSortField;

   // 依索引取得 SortField 物件，將之轉換為 
   //  TopBottomNSortField 物件，然後將它傳回來。
   topBottomNSortField = (TopBottomNSortField)
   Report.get_DataDefinition().get_SortFields().get_Item(sortFieldIndex);
   if (topBottomNSortField != null) return topBottomNSortField;
   else return null;
} 

需求

命名空間：CrystalDecisions.CrystalReports.Engine

**平台：**Windows 98、Windows NT 4.0、Windows Millennium Edition、Windows 2000

**組件：**CrystalDecisions.Crystalreports.Engine (CrystalDecisions.Crystalreports.Engine.dll)

請參閱

TopBottomSortField 成員 | CrystalDecisions.CrystalReports.Engine 命名空間