listbox object display

listbox object display

• John Stallo

  i tried loading the listbox with treenodes and it achieves my result, but....
  
  it displays as follows:
     Treenode: CUSTOMER A
     Treenode: CUSTOMER B
  
  that's pretty annoying...
  
  is there any way to get the literal "Treenode" to not show up
  
  can't do a replace as "Treenode" isn't in any string...
  
  this seems like such a simple task...  am i missing something here

  
  

• Landrover S3

  thanks!!  that worked great!!
  

• pVoice

  We'd have to see the text to know for sure. It think there are other ways around this.
  
  if you write:  Dim obj as object = "Stop War"
  
  You may have to   Dim foo as string = ctype(foo, string)
  
  But.... I think there's a better way.
  
  At least listview controls have a tag field for each item.
  
  I use the tag field which is an object that you can put anything in, as a data descriptor field.
  
  

• Nata Korshunova

  I was hoping that the listbox items had tags but it doesn't. That's why I don't like list boxes.
  
  
  OK Plan B.
  
  When you get the string with "treenode in them... is that data you want also there
  
  If so, you can do this   stringobject.replace("StringYouWantToEliminate","")
  
  

• Christian Arnold

  i'm trying to stay away from the listview control as i'm going to try to convert this application to asp.net when i'm done and i don't think the listview control is included in the toolbox for asp.net...
  
  yeah, i know, i could download it or create my own, but i'm not that advanced yet...
  
  so is there no way to display an object's text property in a listbox
  
  example:
  
  

  Public Structure ListNode
     Public Text As String
     Public Tag As String
  End Structure
  '-----------------------------------------------------------------
  ' LOAD LISTBOX
  '-----------------------------------------------------------------
  Dim L As New ListNode
  For Each dr In ds.Tables("CUSTOMER").Rows
     L.Text = dr.Item("CUSTOMER_NAME")
     L.Tag = dr.Item("KEY")
     listbox1.Items.Add(L)
  Next

     
  when i execute this, the listbox just displays something like form1.listbox1.listnode...
  
  how can i get it to just show the text property...
  
  thanks again for any help...
  

• edepicier

  You can set the "DisplayMember" property of the listbox to a field of your liking or override the ToString property of your treeview (more complicated).  I created my own ListItem object that I use in all combo/listboxes:

  Public Structure ListItem
       Public Text As String
       Public Value As Integer
       Public Tag As String
       Public Sub New(ByVal sText As String)
            Text = sText
       End Sub
       Public Sub New(ByVal sText As String, ByVal iValue As Integer, Optional ByVal sTag As String = "")
            Text = sText
            Value = iValue
            Tag = sTag
       End Sub
       Public Overrides Function ToString() As String
            ToString = Text
       End Function
  End Structure

  This way, you can load pretty much any information into the object.

  Dim poItem as ListItem
  Dim piX as integer

  For piX = 0 to 10
     poItem = New ListItem("Entry " & piX, piX)
     Listbox1.Items.Add(poItem)
  Next

  To reference it, it's simply Listbox1.Items(1).Value or Listbox1.Items(3).Tag, etc.

   

  
  
• listbox object display