Prevent double entries in ListView using C#?

Question

How can we access the items added to a ListView?

The thing I have to do is: add an item to the list view. I want to check if the item to add to the listview is alrea

Answer 1

The ListView class provides a few different methods to determine if an item exists:

• Using Contains on the Items collection
• Using one of the FindItemWithText methods

They can be used in the following manner:

// assuming you had a pre-existing item
ListViewItem item = ListView1.FindItemWithText("test");
if (!ListView1.Items.Contains(item))
{
    // doesn't exist, add it
}

// or you could find it by the item's text value
ListViewItem item = ListView1.FindItemWithText("test");
if (item != null)
{
    // it exists
}
else
{
    // doesn't exist
}

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