How prevent duplicate items listView C#

Question

I am using Windows Forms. With this code I add items to listView from comboBox.

ListViewItem lvi = new ListViewItem();
lvi.Text = comboBox1.Text;
lvi.SubItems.Add("");
lvi.SubItems.Add("");
lvi.SubItems.Add("");
lvi.SubItems.Add("")

if (!listView1.Items.Contains(lvi))
{
    listView1.Items.Add(lvi);
}

I need prevent duplicate items but not work, How Can I solve this?

Answer 1

The ListView class provides a few way to check if an item exists:

• Contains On Items collection, and
• FindItemWithText methods

It can be used like :

// assuming you had a pre-existing item
ListViewItem item = ListView1.FindItemWithText("item_key");
if (item == null)
{
    // item does not exist
}


// you can also use the overloaded method to match subitems
ListViewItem item = ListView1.FindItemWithText("sub_item_text", true, 0);