How to change selected item text in list box at run time? - vb.net

Question

I tried with code like this:
Private Sub TextBox1_Leave(sender As Object, e As EventArgs) Handles MyBase.Leave
' This way is not working
ListBox1.SelectedItem = TextBox1.Text
' This is not working too
ListBox1.Items(ListBox1.SelectedIndex) = TextBox1.Text
End Sub
The form is looked like this:
I need to change that list text while user typing in the text box. Is it possible to do that at run time?

Answer 1

You are using the form's leave event MyBase.Leave, so when it fires, it is useless to you.
Try using the TextChanged event of the TextBox instead.
Private Sub TextBox1_TextChanged(sender As Object, e As EventArgs) _
Handles TextBox1.TextChanged
Make sure to check if an item is actually selected in the ListBox:
If ListBox1.SelectedIndex > -1 Then
ListBox1.Items(ListBox1.SelectedIndex) = TextBox1.Text
End If

Answer 2

Use Double click to select line (item) inside list box and change or modify.
Instead of using text box use ListBox1_MouseDoubleClick event
Private Sub ListBox1_MouseDoubleClick(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles ListBox1.MouseDoubleClick
then add this code inside this event
Dim intIndex As Integer = ListBox1.Items.IndexOf(ListBox1.SelectedItem)
Dim objInputBox As Object = InputBox("Change Item :","Edit", ListBox1.SelectedItem)
If Not objInputBox = Nothing Then
ListBox1.Items.Remove(ListBox1.SelectedItem)
ListBox1.Items.Insert(intIndex, objInputBox)
End If
OR
Dim objInputBox As Object = InputBox("Change Item :","Edit", ListBox1.SelectedItem)
If Not objInputBox = Nothing Then
ListBox1.Items(ListBox1.SelectedIndex) = objInputBox
End If