Check/DeCheck all items in Check-list box vb.net

Question

A couple of questions about check list boxes:

1. How to check/decheck all the item in the list

2. How do you copy or delete all checked items in the list

Answer 1

While you can scan the CheckedItems and CheckedIndices properties, you cannot modify them at the same time. Make a copy of the collection and process the copy instead.

Uncheck all checked items:

Dim CheckedIndices(CheckedListBox1.CheckedItems.Count - 1) As Integer
CheckedListBox1.CheckedIndices.CopyTo(CheckedIndices, 0)
For Each Index As Integer In CheckedIndices
    CheckedListBox1.SetItemChecked(Index, False)
Next

Delete all checked items:

Dim CheckedItems(CheckedListBox1.CheckedItems.Count - 1) As Object
CheckedListBox1.CheckedItems.CopyTo(CheckedItems, 0)
For Each CheckedItem As Object In CheckedItems
    ' Alternateively, add code to copy CheckedItem here.
    CheckedListBox1.Items.Remove(CheckedItem)
Next

EDIT: Changed array declarations to (.Count - 1). VB's declaration syntax in infuriating sometimes.