How to edit all values in listbox by read, insert and remove? VB

I have a listbox in VB 2010 that needs to multiply all values by a number as typed in a textbox. The value must be read, remove and inserted using a loop.



Why remove and reinsert, when you only want to modify the existing values? Try this:

    Dim mult = Val(TextBox1.Text)
    For vIndex = 0 To ListBox1.Items.Count - 1
        Dim newVal = Val(ListBox1.Items(vIndex)) * mult
        ListBox1.Items(vIndex) = Trim(Str(newVal))

Its simple to update an item in listbox. Just write the above code at your update button's click event.

Dim index As Integer=Listbox1.SelectedIndex

here textbox contains value to be updated. First write the value in textbox. Then select the item u wish to update with the value of textbox and then click the update button to update the item.

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