ListBox.SelectedIndexCollection 类

定义

public: ref class ListBox::SelectedIndexCollection : System::Collections::IList

public class ListBox.SelectedIndexCollection : System.Collections.IList

type ListBox.SelectedIndexCollection = class
    interface IList
    interface ICollection
    interface IEnumerable

Public Class ListBox.SelectedIndexCollection
Implements IList

继承

Object

ListBox.SelectedIndexCollection

实现

ICollection IEnumerable IList

示例

下面的示例演示如何使用 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 ，可用于指定起始搜索索引，以便从中连续搜索所有项 ListBox。 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。 在找到项后 ListBox，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

该 ListBox.SelectedIndexCollection 类将索引存储在所选项中 ListBox。 存储在其中的 ListBox.SelectedIndexCollection 索引是类中的 ListBox.ObjectCollection 索引位置。 类 存储显示在 中的所有 项。

下表是一个示例，说明如何在ListBox.ObjectCollection示例中ListBox存储项目的项ListBox及其选择状态。

下表根据 ListBox.ObjectCollection 上表中的示例演示了显示方式 ListBox.SelectedIndexCollection 。

可以使用此类的属性和方法对集合执行各种任务。 通过 Contains 该方法，可以确定类中的 ListBox.ObjectCollection 索引位置是否是存储在该类中的 ListBox.SelectedIndexCollection所选索引的成员。 知道该项位于集合中后，可以使用IndexOf该方法来确定存储集合ListBox.ObjectCollection中ListBox特定索引位置的位置。