protected override void SetStringValue(string value)
{
var xmlDoc = new XmlDocument();
xmlDoc.LoadXml(value);
var globalKeyItems = Constants.LoadKeyItems(xmlDoc);
this.KeyItems = new ObservableCollection <KeyItemViewModel>(globalKeyItems.Select(kvp => new KeyItemViewModel(kvp.Key, kvp.Value)));
this.SelectedKeyItem = this.KeyItems.FirstOrDefault();
}
private void KeyItemsCollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
for (var i = 0; i < this.KeyItems.Count; i++)
{
this.KeyItems[i].Index = i;
}
if (e.Action == NotifyCollectionChangedAction.Add)
{
foreach (var newObject in e.NewItems)
{
var newMessage = newObject as MessageViewModel;
if (newMessage != null)
{
newMessage.PropertyChanged += this.KeyItemIsDirtyChanged;
}
}
}
if (e.Action == NotifyCollectionChangedAction.Remove)
{
foreach (var oldObject in e.OldItems)
{
var oldMessage = oldObject as MessageViewModel;
if (oldMessage != null)
{
oldMessage.PropertyChanged -= this.KeyItemIsDirtyChanged;
}
}
}
if (!this.KeyItems.Contains(this.SelectedKeyItem))
{
this.SelectedKeyItem = this.lastSelectedIndex < this.KeyItems.Count && this.lastSelectedIndex >= 0 ? this.KeyItems[this.lastSelectedIndex] : this.KeyItems.LastOrDefault();
}
this.OnPropertyChanged(nameof(this.KeyItems));
this.OnPropertyChanged(nameof(this.IsDirty));
}