Question about Listbox

[Guest]

See the code below,why my listbox can't refresh after my do the RemoveAt attribute in the event of Button1_Click
I have used listbox1.refresh() and listbox1.update() ,but they didn't work
any ideas,Thank you for your hel

Private A As New ArrayLis

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Loa
Dim i As Intege
For i = 0 To
A.Add(i * 100
Nex
ListBox1.DataSource =
End Su

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Clic
Dim i As Intege
i = ListBox1.SelectedInde
A.RemoveAt(i
ListBox1.Update(
ListBox1.Refresh(

End Su

 

[Armin Zingler]

See the code below,why my listbox can't refresh after my do the
RemoveAt attribute in the event of Button1_Click. I have used
listbox1.refresh() and listbox1.update() ,but they didn't work. any
ideas,Thank you for your help


Private A As New ArrayList

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles MyBase.Load
Dim i As Integer
For i = 0 To 4
A.Add(i * 100)
Next
ListBox1.DataSource = A
End Sub

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e
As System.EventArgs) Handles Button1.Click
Dim i As Integer
i = ListBox1.SelectedIndex
A.RemoveAt(i)
ListBox1.Update()
ListBox1.Refresh()

End Sub

In a bound control, the control displays the data from the datasource it is
bound to. You did not remove an item from the Arraylist, consequently the
Listbox still displays all items.


--
Armin

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[Guest]

thanx for your help,but I have used the a.Removeat(i) to remove the item from the arraylist in the code

 

[Armin Zingler]

thanx for your help,but I have used the a.Removeat(i) to remove the
item from the arraylist in the code.

Yes, you are right. Sorry! I don't know how to refersh a bound listbox. I
would remove and attach the datasource again:

Listbox1.DataSource = Nothing
Listbox1.DataSource = A

But there's probably a better way.


--
Armin

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