public ActionResult Create([Bind(Include = "Id,Text,ParentID")] TreeView treeView, int?id)
{
if (ModelState.IsValid)
{
db.Trees.Add(treeView);
db.SaveChanges();
if (id != null)
{
var tree = db.Trees.Find(id);
if (tree != null)
{
treeView.Parent = tree;
}
else
{
treeView.Parent = null;
}
}
else
{
treeView.Parent = null;
}
db.SaveChanges();
return(RedirectToAction("Index"));
}
ViewBag.ParentID = new SelectList(db.Trees, "Id", "Text", treeView.ParentID);
return(View(treeView));
}
public TreeViewController(TreeViewContext context)
{
_context = context;
if (_context.TreeNodes.Count() == 0)
{
_context.TreeNodes.AddRange(defaultTreeViewState);
_context.SaveChanges();
}
}
public IActionResult GetById(string id)
{
if (id == "0")
{
_context.RemoveRange(_context.TreeNodes);
_context.SaveChanges();
_context.TreeNodes.AddRange(defaultTreeViewState);
_context.SaveChanges();
return(new NoContentResult());
}
else
{
var foundNode = _context.TreeNodes.FirstOrDefault(n => n.Id == id);
if (foundNode == null)
{
return(NotFound());
}
return(new ObjectResult(foundNode));
}
}
