ListBox.Sorted 屬性

定義

命名空間:

System.Windows.Forms

組件:

System.Windows.Forms.dll

來源:

ListBox.cs

取得或設定一個值，表示 中的 ListBox 項目是否按字母順序排序。

public:
 property bool Sorted { bool get(); void set(bool value); };

public bool Sorted { get; set; }

member this.Sorted : bool with get, set

Public Property Sorted As Boolean

屬性值

Boolean

true如果控制項目被排序;否則，。 false 預設值為 false。

範例

以下程式碼範例示範如何使用此 GetSelected 方法判斷 a ListBox 中哪些項目被選取，從而選擇未被選取的項目，並取消選取已選取的項目。 範例也示範如何使用屬性 SelectionMode ，使 a ListBox 擁有多個被選項目，並用該 Sorted 屬性示範如何自動排序項目 ListBox 。 此範例要求 ListBox一個名為 、 的 加入到一個形式 listBox1中，且該範例中定義的方法必須 InitializeMyListBox 從 Load 該形式事件中被呼叫。

private:
   void InitializeMyListBox()
   {
      // Add items to the ListBox.
      listBox1->Items->Add( "A" );
      listBox1->Items->Add( "C" );
      listBox1->Items->Add( "E" );
      listBox1->Items->Add( "F" );
      listBox1->Items->Add( "G" );
      listBox1->Items->Add( "D" );
      listBox1->Items->Add( "B" );

      // Sort all items added previously.
      listBox1->Sorted = true;

      // Set the SelectionMode to select multiple items.
      listBox1->SelectionMode = SelectionMode::MultiExtended;

      // Select three initial items from the list.
      listBox1->SetSelected( 0, true );
      listBox1->SetSelected( 2, true );
      listBox1->SetSelected( 4, true );

      // Force the ListBox to scroll back to the top of the list.
      listBox1->TopIndex = 0;
   }

   void InvertMySelection()
   {
      // Loop through all items the ListBox.
      for ( int x = 0; x < listBox1->Items->Count; x++ )
      {
         // Select all items that are not selected,
         // deselect all items that are selected.
         listBox1->SetSelected( x,  !listBox1->GetSelected( x ) );
      }
      listBox1->TopIndex = 0;
   }

private void InitializeMyListBox()
{
   // Add items to the ListBox.
   listBox1.Items.Add("A");
   listBox1.Items.Add("C");
   listBox1.Items.Add("E");
   listBox1.Items.Add("F");
   listBox1.Items.Add("G");
   listBox1.Items.Add("D");
   listBox1.Items.Add("B");

   // Sort all items added previously.
   listBox1.Sorted = true;

   // Set the SelectionMode to select multiple items.
   listBox1.SelectionMode = SelectionMode.MultiExtended;

   // Select three initial items from the list.
   listBox1.SetSelected(0,true);
   listBox1.SetSelected(2,true);
   listBox1.SetSelected(4,true);

   // Force the ListBox to scroll back to the top of the list.
   listBox1.TopIndex=0;
}

private void InvertMySelection()
{
   // Loop through all items the ListBox.
   for (int x = 0; x < listBox1.Items.Count; x++)
   {
      // Determine if the item is selected.
      if (listBox1.GetSelected(x))
         // Deselect all items that are selected.
         listBox1.SetSelected(x,false);      
      else
         // Select all items that are not selected.
         listBox1.SetSelected(x,true);
   }
   // Force the ListBox to scroll back to the top of the list.
   listBox1.TopIndex=0;
}

Private Sub InitializeMyListBox()
   ' Add items to the ListBox.
   listBox1.Items.Add("A")
   listBox1.Items.Add("C")
   listBox1.Items.Add("E")
   listBox1.Items.Add("F")
   listBox1.Items.Add("G")
   listBox1.Items.Add("D")
   listBox1.Items.Add("B")

   ' Sort all items added previously.
   listBox1.Sorted = True

   ' Set the SelectionMode to select multiple items.
   listBox1.SelectionMode = SelectionMode.MultiExtended

   ' Select three initial items from the list.
   listBox1.SetSelected(0, True)
   listBox1.SetSelected(2, True)
   listBox1.SetSelected(4, True)

   ' Force the ListBox to scroll back to the top of the list.
   listBox1.TopIndex = 0
End Sub

Private Sub InvertMySelection()

   Dim x As Integer
   ' Loop through all items the ListBox.
   For x = 0 To listBox1.Items.Count - 1

      ' Determine if the item is selected.
      If listBox1.GetSelected(x) = True Then
         ' Deselect all items that are selected.
         listBox1.SetSelected(x, False)
      Else
         ' Select all items that are not selected.
         listBox1.SetSelected(x, True)
      End If
   Next x
   ' Force the ListBox to scroll back to the top of the list.
   listBox1.TopIndex = 0
End Sub

備註

使用屬性Sorted自動按字母順序排序字串。ListBox 當項目加入 ListBox排序後，項目會被移至排序列表中的適當位置。 在將項目加入 ListBox時，先排序項目再新增項目會更有效率。

ListBox A Sorted 設定為 時true，不應該綁定到 該DataSource屬性的資料。 要將排序資料列為綁定 ListBox，你應該綁定到支援排序的資料來源，並由該資料來源提供排序。