public ActionResult Create(Area area, string nextStep)
{
if (ModelState.IsValid)
{
db.Area.Add(area);
db.SaveChanges();
return Redirect(nextStep);
}
ViewBag.ParentId = new SelectList(db.Area, "Id", "Name", area.ParentId);
CreateFrame(title);
return View(area);
}
public static Node<Area> CreateTree(Area[] areas, Area current)
{
Dictionary<int, Node<Area>> lookup = new Dictionary<int, Node<Area>>();
Dictionary<int?, List<Node<Area>>> children = new Dictionary<int?, List<Node<Area>>>();
List<Node<Area>> roots = new List<Node<Area>>();
foreach (var area in areas)
{
Node<Area> node = new Node<Area>();
node.Data = area;
node.Children = new List<Node<Area>>();
lookup.Add(area.Id, node);
if (area.ParentId != null)
{
if (!children.ContainsKey(area.ParentId))
{
children[area.ParentId] = new List<Node<Area>>();
}
children[area.ParentId].Add(node);
}
if (area.ParentId == null)
{
node.Parent = null;
roots.Add(node);
}
}
foreach (var node in lookup.Values)
{
var area = node.Data;
Node<Area> parent = null;
if (area.ParentId != null)
{
parent = lookup[(int)area.ParentId];
}
node.Parent = parent;
if (children.ContainsKey(area.Id))
{
node.Children = children[area.Id];
}
}
return lookup[current.Id];
}
public ActionResult Edit(Area area, string nextStep)
{
if (ModelState.IsValid)
{
db.Entry(area).State = EntityState.Modified;
db.SaveChanges();
return Redirect(nextStep);
}
ViewBag.ParentId = new SelectList(db.Area, "Id", "Name", area.ParentId);
return View(area);
}