public void RemoveCategory()
{
if (this.selectedCategory == null)
{
MessageBoxHelper.ShowWarning("请选择要删除的节点");
return;
}
if (MessageBoxHelper.ShowConfirm(string.Format("您确定要删除\"{0}\"?", this.selectedCategory.Name)) == MessageBoxResult.No)
{
return;
}
Category category = this.selectedCategory.Model;
this.categoryClient.DeleteCategoryAsync(this.scope.ToString(), category.Id)
.ExcuteOnUIThread(
() =>
{
Tree.PostorderTraverse(this.selectedCategory,
(node) =>
{
CategoryViewModel viewModel = node as CategoryViewModel;
if (viewModel.Children != null && viewModel.Children.Count > 0)
{
for (int i = viewModel.Children.Count - 1; i >= 0; i--)
{
viewModel.RemoveChildAt(i);
}
}
});
if (this.selectedCategory.Parent == null)
{
this.CategoryList.Remove(this.selectedCategory);
}
else
{
this.selectedCategory.Parent.RemoveChild(this.selectedCategory);
}
},
(ex) =>
{
TaskHelper.HandleWebException(ex);
});
}
public static void CleanupTree(ObservableCollection <TreeNodeModel> tree)
{
if (tree != null && tree.Count > 0)
{
Tree.PostorderTraverse(tree,
(e) =>
{
CategoryViewModel current = e as CategoryViewModel;
if (current.Children != null && current.Children.Count > 0)
{
for (int i = current.Children.Count - 1; i >= 0; i--)
{
current.RemoveChildAt(i);
}
}
});
tree.Clear();
}
}
