WPF: Raise an Event when Item is added in ListView

Question

I am working on WPF and I am using a ListView, and I need to fire an event when an item is added to it. I have tried this:

var dependencyPropertyDescriptor = Dep         


        

Answer 1

Note this only works for a WPF Listview!

After some research I have found the answer to my question and It's really easy:

public MyControl()
{
    InitializeComponent();
    ((INotifyCollectionChanged)listView.Items).CollectionChanged +=  ListView_CollectionChanged;
}

private void ListView_CollectionChanged(object sender, NotifyCollectionChangedEventArgs e)     
{
    if (e.Action == NotifyCollectionChangedAction.Add)
    {
      // scroll the new item into view   
      listView.ScrollIntoView(e.NewItems[0]);
    }
}

Actually, the NotifyCollectionChangedAction enum allows your program to inform you about any change such as: Add, Move, Replace, Remove and Reset.

Answer 2

Note: This solution was meant for a WinForms ListView.

In my case I ended up coming to a fork in the road with 2 choices...

(1) Create a custom ListView control that inherits a ListView's class. Then add a new event to be raised when any item is added, deleted, or ListView is cleared. This path seemed really messy and long. Not to mention the other big issue that I would need to replace all my original ListViews with the newly created Custom ListView control. So I passed on this!

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(2) With every add, delete, or clear call to the listview I also called another function simulating the CollectionChanged event.

Create the new event like function...

private void myListViewControl_CollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
    //The projects ListView has been changed
    switch (e.Action)
    {
        case NotifyCollectionChangedAction.Add:
            MessageBox.Show("An Item Has Been Added To The ListView!");
            break;
        case NotifyCollectionChangedAction.Reset:
            MessageBox.Show("The ListView Has Been Cleared!");
            break;
    }
}

Add an item to the ListView elsewhere...

ListViewItem lvi = new ListViewItem("ListViewItem 1");
lvi.SubItems.Add("My Subitem 1");
myListViewControl.Items.Add(lvi);
myListViewControl_CollectionChanged(myListViewControl, new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Add, lvi, lvi.Index));

Clear the ListView elsewhere...

myListViewControl.Items.Clear();
myListViewControl_CollectionChanged(myListViewControl, new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Reset));