How to add items in listbox without duplicate Like That :

Question

I tried to show items without duplicate in List Box.

private void Lst_Box_SelectedIndexChanged(object sender, EventArgs e)
{
    if (Chk_Multi.Checked == true)
    {
        Lst_Box.SelectionMode = SelectionMode.MultiSimple;
        if (Lst_Box.SelectedItem == "Janvier")
        {
            Lst_Selected.Items.Add(Lst_Box.Text);
        }
    }
    if (Chk_Multi.Checked == false)
    {
        Lst_Box.SelectionMode = SelectionMode.One;
        Lst_Selected.Items.Add(Lst_Box.Text);
    }
}

write code that will search the Listbox using `.Contains()` method you need to check the value if it exist first before adding to the ListBox very simple task to do.. — MethodMan, Feb 21 '16 at 00:58

score 2 · Accepted Answer · answered Feb 21 '16 at 00:58

2

if(!Lst_Selected.Items.Contains(Lst_Box.Text)
{
  Lst_selected.Items.Add(Lst_Box.Text);
}

answered Feb 21 '16 at 00:58

Bogey

4,926
4
32
57

Thank You it work successful – Fatihi Youssef Feb 21 '16 at 01:29

score 1 · Answer 2 · answered Feb 21 '16 at 01:03

1

You could use the Except extension method... example..

int[] foo = new int[]{1,2,3};
int[] bar = new int[]{1,3};

IEnumerable<int> fooMinusBar = foo.Except(bar);
IEnumerable<int> barMinusFoo = bar.Except(foo);

answered Feb 21 '16 at 01:03

Aydin

15,016
4
32
42

How to add items in listbox without duplicate Like That :

2 Answers2