Listbox.selecteditem is not a collection type

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I'm trying to move multi Items from ListBox1 to ListBox2,
But I receive an error message that the below underlined is not a collection type!

What I have tried:

Imports System.Web.UI.WebControls
Imports System.Web.UI.WebControls.ListItemCollection

For Each selectedItem In ListBox1.SelectedItem
            ListBox2.Items.Add(ListBox1.SelectedItem)
            ListBox1.Items.Remove(ListBox1.SelectedItem)
        Next

Posted 29-Aug-18 22:22pm

MicroPixel

Updated 29-Aug-18 22:58pm

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Richard MacCutchan · Answer 1 · 2018-08-29T22:59:00

Solution 1

ListBox1.SelectedItem is a single item, so you cannot use a For Each statement on it. You need to iterate the ListControl.Items Property (System.Web.UI.WebControls) | Microsoft Docs[^].

Posted 29-Aug-18 22:59pm

Richard MacCutchan

Comments

MicroPixel 30-Aug-18 6:42am

Thank you Richard, still unclear to me! do you mean I cant use any other statements like for or while?

Richard MacCutchan 30-Aug-18 7:32am

You can use any statements that you want; but only if they follow the correct syntax and usage. You could use an index (for or while) into the ListBox items, but For Each is much simpler.