ListBox.SelectedIndices 屬性

定義

命名空間:

System.Windows.Forms

組件:

System.Windows.Forms.dll

來源:

ListBox.cs

取得一個集合，包含所有目前選取 ListBox項目的零為基礎索引。

public:
 property System::Windows::Forms::ListBox::SelectedIndexCollection ^ SelectedIndices { System::Windows::Forms::ListBox::SelectedIndexCollection ^ get(); };

[System.ComponentModel.Browsable(false)]
public System.Windows.Forms.ListBox.SelectedIndexCollection SelectedIndices { get; }

[<System.ComponentModel.Browsable(false)>]
member this.SelectedIndices : System.Windows.Forms.ListBox.SelectedIndexCollection

Public ReadOnly Property SelectedIndices As ListBox.SelectedIndexCollection

屬性值

ListBox.SelectedIndexCollection

ListBox.SelectedIndexCollection A 包含目前控制項目的索引。 若目前未選取任何項目，則會回傳一個空項目 ListBox.SelectedIndexCollection 。

屬性

BrowsableAttribute

範例

以下程式碼範例示範如何使用此 FindString 方法搜尋 中所有搜尋文字 ListBox的實例。 範例中使用 FindString 了該方法版本，允許你指定一個起始搜尋索引，從中持續搜尋所有項目 ListBox。 範例同時示範如何判斷方法何時 FindString 從列表頂端開始搜尋，以防止遞迴搜尋。 一旦在 中找到 ListBox物品，就會用該 SetSelected 方法選擇它們。

private:
   void FindAllOfMyString( String^ searchString )
   {
      // Set the SelectionMode property of the ListBox to select multiple items.
      listBox1->SelectionMode = SelectionMode::MultiExtended;

      // Set our intial index variable to -1.
      int x = -1;

      // If the search string is empty exit.
      if ( searchString->Length != 0 )
      {
         // Loop through and find each item that matches the search string.
         do
         {
            // Retrieve the item based on the previous index found. Starts with -1 which searches start.
            x = listBox1->FindString( searchString, x );

            // If no item is found that matches exit.
            if ( x != -1 )
            {
               // Since the FindString loops infinitely, determine if we found first item again and exit.
               if ( listBox1->SelectedIndices->Count > 0 )
               {
                  if ( x == listBox1->SelectedIndices[ 0 ] )
                                    return;
               }

               // Select the item in the ListBox once it is found.
               listBox1->SetSelected( x, true );
            }
         }
         while ( x != -1 );
      }
   }

private void FindAllOfMyString(string searchString)
{
   // Set the SelectionMode property of the ListBox to select multiple items.
   listBox1.SelectionMode = SelectionMode.MultiExtended;
   
   // Set our intial index variable to -1.
   int x =-1;
   // If the search string is empty exit.
   if (searchString.Length != 0)
   {
      // Loop through and find each item that matches the search string.
      do
      {
         // Retrieve the item based on the previous index found. Starts with -1 which searches start.
         x = listBox1.FindString(searchString, x);
         // If no item is found that matches exit.
         if (x != -1)
         {
            // Since the FindString loops infinitely, determine if we found first item again and exit.
            if (listBox1.SelectedIndices.Count > 0)
            {
               if(x == listBox1.SelectedIndices[0])
                  return;
            }
            // Select the item in the ListBox once it is found.
            listBox1.SetSelected(x,true);
         }
      }while(x != -1);
   }
}

Private Sub FindAllOfMyString(ByVal searchString As String)
   ' Set the SelectionMode property of the ListBox to select multiple items.
   listBox1.SelectionMode = SelectionMode.MultiExtended

   ' Set our intial index variable to -1.
   Dim x As Integer = -1
   ' If the search string is empty exit.
   If searchString.Length <> 0 Then
      ' Loop through and find each item that matches the search string.
      Do
         ' Retrieve the item based on the previous index found. Starts with -1 which searches start.
         x = listBox1.FindString(searchString, x)
         ' If no item is found that matches exit.
         If x <> -1 Then
            ' Since the FindString loops infinitely, determine if we found first item again and exit.
            If ListBox1.SelectedIndices.Count > 0 Then
               If x = ListBox1.SelectedIndices(0) Then
                  Return
               End If
            End If
            ' Select the item in the ListBox once it is found.
            ListBox1.SetSelected(x, True)
         End If
      Loop While x <> -1
   End If
End Sub

備註

對於多重選擇 ListBox，此屬性回傳一個集合，包含所有在 中被選取 ListBox項目的索引。 對於單一選取 ListBox，此屬性會回傳一個集合，該集合包含唯一選取 ListBox項目索引的元素。 欲了解更多如何操作集合中的項目，請參見 ListBox.SelectedIndexCollection。

課程 ListBox 提供多種方式來參考所選項目。 你不必用該 SelectedIndices 屬性來取得當前選取項目 ListBox的索引位置，你可以使用該 SelectedIndex 屬性。 如果你想取得目前在 中選取 ListBox的項目，而不是項目的索引位置，請使用 屬性 SelectedItem 。 此外，如果你想在多選ListBox中取得所有指定項目，也可以使用該SelectedItems房產。

另請參閱

• SelectedIndex
• SelectedItem
• SelectedItems