VB.NET ขอโค้ดสลับลำดับข้อมูลภายใน Listbox หน่อยคับ....Move Up/Down

 
Option Explicit
Private Sub Form_Load()
   'set the multiselect property of the listbox control (LIST1) to FALSE!
 
   'set the following properties
   cmdAdd.Caption = "add"
   cmdRemove.Caption = "remove"
   cmdUp.Caption = "up"
   cmdDown.Caption = "down"
End Sub
 
Private Sub cmdAdd_Click()
   'add an item
   List1.AddItem "Item " & CStr(List1.ListCount + 1)
End Sub
 
Private Sub cmdRemove_Click()
   'remove an item
   If List1.ListIndex > -1 Then
      List1.RemoveItem List1.ListIndex
   End If
End Sub
 
Private Sub cmdUp_Click()
   Dim sText As String
   Dim iIndex As Integer
   'check: only proceed if there is a selected item
   If List1.SelCount = 1 Then
      'index 0 is top item which can't be moved up!
      If List1.ListIndex = 0 Then Exit Sub
      'save items text and items indexvalue
      sText = List1.List(List1.ListIndex)
      iIndex = List1.ListIndex
      'remove item
      List1.RemoveItem List1.ListIndex
      'place item back on new position
      List1.AddItem sText, iIndex - 1
      'if you keep that item selected
      'you can keep moving it by pressing cmdUp
      List1.Selected(iIndex - 1) = True
   End If
End Sub
 
Private Sub cmdDown_Click()
   Dim sText As String
   Dim iIndex As Integer
   'check: only proceed if there is a selected item
   If List1.SelCount = 1 Then
      'check: last item can't be moved down
      If List1.ListCount - 1 = List1.ListIndex Then Exit Sub
      'save items text and items indexvalue
      sText = List1.List(List1.ListIndex)
      iIndex = List1.ListIndex
      'remove item
      List1.RemoveItem List1.ListIndex
      'place item back on new position
      List1.AddItem sText, iIndex + 1
      'if you keep that item selected
      'you can keep moving it by pressing cmdDown
      List1.Selected(iIndex + 1) = True
   End If
End Sub