如何使ListView专注于特定项目？

Question

I can't seem to figure it out, because I don't seem to be able to cast my ListView's items to the ListViewItem type and call ListViewItem.Focus(). The following won't work because the ListView's items are of type LogRecord:

((ListViewItem)listView.Items[0]).Focus();

EDIT: I want the scrollbar to move to where the item is, basically, or better said, that the item becomes visible in the list of items the user sees.

Any ideas on how I can get my ListView to focus in on a particular item? Right now its bound to a collection. Here's how I set up my ListView object:

listView = new ListView();
Grid.SetRow(listView, 1);
grid.Children.Add(listView);
GridView myGridView = new GridView();
// Skipping some code here to set up the GridView columns and such.
listView.View = myGridView;
Binding myBinding = new Binding();
myBinding.Source = PaneDataContext.LogsWrapper;
listView.SetBinding(ItemsControl.ItemsSourceProperty, myBinding);

I bind to this data type (LogRecord contains things like LogRecord.Message that corresponds to a Message column on the grid view, etc.; and the code works):

        public class LogRecordWrapper : IEnumerable<LogRecord>, INotifyCollectionChanged
        {
            public List<LogRecord> RowList { get; set; }

            public event NotifyCollectionChangedEventHandler CollectionChanged;

            public LogRecordWrapper()
            {
                RowList = new List<LogRecord>();
            }

            protected virtual void OnCollectionChanged(NotifyCollectionChangedEventArgs e)
            {
                if (CollectionChanged != null)
                {
                    CollectionChanged(this, e);
                }
            }

            public void SignalReset()
            {
                OnCollectionChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Reset, null));
            }

            public void Add(LogRecord item)
            {
                RowList.Add(item);
                OnCollectionChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Add, item));
            }

            public IEnumerator<LogRecord> GetEnumerator()
            {
                return RowList.GetEnumerator();
            }

            System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator()
            {
                return GetEnumerator();
            }
        }

Answer 1

ListView.ScrollIntoView

ListBox.ScrollIntoView Method

The link says ListBox but it works with ListView also

As for not working with Focus please post how you are using ScrollIntoView.

Answer 2

Could you use:

listView.Items[0].Focused = true;

...or perhaps:

listVIew.Items[0].Selected = true;

(I'm not positive what kind of "focus" you are after)

Then combine with (or use in place):

listView.Items[0].EnsureVisible();

Answer 3

This is amazing!!!! 05-29-2002, 04:53 PM #1 Jim Guest ListView EnsureVisible not working. Any ideas? The code ... in fact find and highlight selected item, it's just not scrolling to it and making it visible. The user is forced to scroll to the item.

04-04-2004, 12:07 AM luchmun Hi, working on a form...Everything goes fine but the problem is that even i use the lstitem.ensurevisible with listitem.selected = true the current entry does not become visible.

11 YEARS later and still it does not work and no one, not even Microsoft seem to know why? The answer that works for me is listview1.ensurevisible(itemindex) NOT listview.items(itemindex).ensurevisible