如何确定ListView中是否未选中项目

Question

On my ListView, IsMultiSelectCheckBoxEnabled is enabled, but I want to know how to identify if an checked item is uncheck, is it on SelectionChanged, if yes, how?

here is an example image:

Thanks,
NicoTing

Answer 1

I have try this

private void button3_Click(object sender, EventArgs e)
{ 
   for (int i = 0; i < listView2.Items.Count; i++)
  {
    if (listView2.Items[i].Checked == fail)
    //Do something
  }
}

Answer 2

You can get it from the SelectionChangedEventArgs parameter.

private void ListBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
    {
        var item = e.AddedItems.ToList();
        var item1 = e.RemovedItems.ToList();
    }

In this e.AddedItems will will return the checked items and e.RemovedItems will return the unchecked items.

Answer 3

Create a new column in the listview that contains "Checked" and "Unchecked". In your submit event, you can compare it to know it was unchecked or checked.

for the new record you will know if the new column field value is empty.