protected virtual void OnItemsChanging(ItemsChangingEventArgs e) {
if (this.ItemsChanging != null)
this.ItemsChanging(this, e);
}
/// <summary>
/// Set the collection of objects that this control will show.
/// </summary>
/// <param name="collection"></param>
/// <remark>This method can safely be called from background threads.</remark>
public override void SetObjects(IEnumerable collection) {
if (this.InvokeRequired) {
this.Invoke((MethodInvoker)delegate { this.SetObjects(collection); });
return;
}
if (this.DataSource == null)
return;
this.BeginUpdate();
try {
// Give the world a chance to cancel or change the assigned collection
ItemsChangingEventArgs args = new ItemsChangingEventArgs(null, collection);
this.OnItemsChanging(args);
if (args.Canceled)
return;
this.DataSource.SetObjects(args.NewObjects);
this.UpdateVirtualListSize();
this.Sort();
}
finally {
this.EndUpdate();
}
}