Use checkbox to select items in a listbox

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Stephen - 30 Sep 2004 16:25 GMT

Im very new to coding and I was wondering if anyone could please tell me how
to select all the items in a listbox when a checkbox is checked, and then
when the checkbox is unchecked to unselected the items in the listbox. Here
is the event I would like to put this into.

private void chkSelectAll_CheckedChanged(object sender,
System.EventArgs e)
{

}

Thank you for any help you can give me

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Morten Wennevik - 30 Sep 2004 17:00 GMT

Hi Stephen,

private void chkSelectAll_CheckedChanged(object sender,
System.EventArgs e)
{
    for(int i = 0; i < myListBox.Items.Count; i++)
    {
        myListBox.SetSelected(i, chkSelectAll.Checked);
    }
}

Note that unless the ListBox' SelectionMode is set to one of the multi modes you will only see the last item selected.

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Happy coding!
Morten Wennevik [C# MVP]

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