private void CreateContainer(object itemsSource, int deep, object parent)
{
CascaderListBox container = new CascaderListBox();
container.Owner = this;
container.SetValue(CascaderListBox.ParentItemProperty, parent);
container.SetValue(CascaderListBox.ItemsSourceProperty, itemsSource);
container.SetValue(CascaderListBox.DisplayMemberPathProperty, this.DisplayMemberPath);
container.SetValue(CascaderListBox.DeepProperty, deep);
container.SetValue(CascaderListBox.StyleProperty, this.ValueBoxStyle);
container.SetValue(CascaderListBox.ItemContainerStyleProperty, this.ValueItemStyle);
container.SelectionChanged += Container_SelectionChanged;
container.ItemClick += Container_ItemClick;
this.ListBoxContainer.Add(container);
}
private void CreateNextContainer(IList selectedItem, int deep)
{
if (selectedItem.Count <= 0)
{
return;
}
object obj = selectedItem[0];
Type type = obj.GetType();
System.Reflection.PropertyInfo propertyInfo = type.GetProperty(this.ChildMemberPath);
IList list = (IList)propertyInfo.GetValue(obj, null); //获取属性值
if (list != null)
{
if (this.ListBoxContainer.Count > deep)
{
CascaderListBox listBox = this.ListBoxContainer[deep];
listBox.SetValue(CascaderListBox.VisibilityProperty, Visibility.Visible);
listBox.SetValue(CascaderListBox.ItemsSourceProperty, list);
listBox.SetValue(CascaderListBox.ParentItemProperty, selectedItem);
for (int i = deep + 1; i < this.ListBoxContainer.Count; i++)
{
this.ListBoxContainer[i].Visibility = Visibility.Collapsed;
}
}
else
{
this.CreateContainer(list, deep, obj);
}
}
else
{
if (this.ListBoxContainer.Count > deep)
{
for (int i = deep; i < this.ListBoxContainer.Count; i++)
{
this.ListBoxContainer[i].Visibility = Visibility.Collapsed;
}
}
}
}
private void Container_ItemClick(object sender, RoutedPropertyChangedEventArgs <object> e)
{
this.SelectedValues.Clear();
CascaderListBox cascaderListBox = sender as CascaderListBox;
if (!this.HasChildren(e.NewValue))
{
this.ShowText = string.Empty;
for (int i = 0; i < cascaderListBox.Deep + 1; i++)
{
CascaderListBox listBox = this.ListBoxContainer[i] as CascaderListBox;
if (listBox.Visibility == Visibility.Visible)
{
this.ShowText = this.ShowText + this.GetPropertyValue(listBox.SelectedItem) + this.Separator;
this.SelectedValues.Add(listBox.SelectedItem);
}
}
}
this.PART_TextBox.Text = this.ShowText.TrimEnd(this.Separator.ToCharArray());
}
private void Container_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
CascaderListBox listBox = sender as CascaderListBox;
this.CreateNextContainer(e.AddedItems, listBox.Deep + 1);
}
