CODEWITHSUNDEEP
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MicroPixel
MicroPixel

Reputation: 9

ListBox.SelectedItem is not a collection type

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.

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

Upvotes: 0

Views: 201

Answers (2)

Ranielle Canlas
Ranielle Canlas

Reputation: 634

To check selected items in a listbox, you need to iterate each item and write a condition that asks if the current item is selected or not. 

For Each item In ListBox1.Items
    If item.selected Then
       ListBox2.Items.Add(item)
       ListBox1.Items.Remove(item)
    End If 
Next

System.Web.UI.WebControls.ListControl.Items returns a collection of items in the control, each Item has Selected property which returns a boolean value.

For Windows Form Applications: //Edit [OP is using System.Web.UI.WebControls
SelectedItem will return only single item.
SelectedItems will return a collection type based on selected items
Make sure that the SelectionMode is not One or None

so instead of using SelectedItem try to use SelectedItems

Upvotes: 1

D Ie
D Ie

Reputation: 841

Change your code like this: 

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

The ForEach statement needs to apply to a list, so you can retrieve individual items in 'selectedItem' variable. Then you can add/remove that individual item as you like

Upvotes: 1

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