ListBox.SelectedIndices 属性

定义

命名空间:

System.Windows.Forms

程序集:

System.Windows.Forms.dll

获取一个集合，该集合包含 ListBox 中所有当前选定项的从零开始的索引。

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

属性值

ListBox.SelectedIndexCollection

ListBox.SelectedIndexCollection，包含控件中当前选定项的索引。 如果当前没有选定的项，则返回空 ListBox.SelectedIndexCollection。

属性

BrowsableAttribute

示例

下面的代码示例演示如何使用 FindString 该方法在项 ListBox中搜索搜索文本的所有实例。 该示例使用方法的版本 FindString ，可用于指定要从中连续搜索所有项 ListBox的起始搜索索引。 该示例还演示如何在 FindString 方法到达项列表底部后从列表顶部开始搜索，以防止递归搜索。 在找到 ListBox项后，将使用该方法 SetSelected 选择它们。

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

注解

对于多选 ListBox，此属性返回一个集合，该集合将包含索引的集合返回到所选 ListBox的所有项。 对于单选 ListBox，此属性返回一个集合，该集合包含包含唯一选定项的索引的 ListBox单个元素。 有关如何操作集合项的详细信息，请参阅 ListBox.SelectedIndexCollection。

该 ListBox 类提供了许多引用所选项的方法。 可以使用该属性，而不是使用SelectedIndices属性获取当前选定项在单选ListBoxSelectedIndex项中的索引位置。 如果要获取当前在项 ListBox中选择的项，而不是项的索引位置，请使用 SelectedItem 该属性。 此外，如果要获取多选ListBox中的所有选定项，可以使用SelectedItems该属性。

另请参阅

• SelectedIndex
• SelectedItem
• SelectedItems