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POmvc4 Edit function nothing happens
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  1. POmvc4 Edit function nothing happens
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    copied!<p>I have problem with edit in mvc4. In controller I added this code:</p> <pre><code>public ActionResult Edit(int id) { using (var db = new MainDatabaseEntities()) { var data = db.ANIME.Where(s =&gt; s.ID_AN == id).Select(c =&gt; new { ID_AN = c.ID_AN, TITLE_OR = c.TITLE_OR, TITLE_EN = c.TITLE_EN, GENRES = c.GENRES}).ToList().Select(s =&gt; new { ViewModel = new ANIME { ID_AN = s.ID_AN, TITLE_OR = s.TITLE_OR, TITLE_EN = s.TITLE_EN, }, GENREID = s.GENRES.Select(c =&gt; c.ID_GE), }).SingleOrDefault(); if (data == null) return HttpNotFound(); data.ViewModel.GENRES = db.GENRES.Select(c =&gt; new { ID_GE = c.ID_GE, GENRE = c.GENRE}).ToList().Select(c =&gt; new GENRES { ID_GE = c.ID_GE, GENRE = c.GENRE }).ToList(); foreach (var c in data.ViewModel.GENRES) c.isSelected = data.GENREID.Contains(c.ID_GE); return View(data.ViewModel); } } [HttpPost] public ActionResult Edit(ANIME anime) { var db = new MainDatabaseEntities(); var editanime = db.ANIME.Include("GENRES").FirstOrDefault(a =&gt; a.ID_AN == anime.ID_AN); if (editanime == null) { editanime.GENRES = anime.GENRES; } foreach (var genre in anime.GENRES) { if (genre.isSelected) { if (!editanime.GENRES.Any(c =&gt; c.ID_GE == genre.ID_GE)) { var addedgenre = new GENRES { ID_GE = genre.ID_GE }; db.GENRES.Attach(addedgenre); editanime.GENRES.Add(addedgenre); } } else { var removedgenre = editanime.GENRES.SingleOrDefault(c =&gt; c.ID_GE == genre.ID_GE); if (removedgenre != null) editanime.GENRES.Remove(removedgenre); } } } db.SaveChanges(); return RedirectToAction("Index"); } </code></pre> <p>When I edit genres with checkboxes it saves but if I change TITLE_OR or TITLE_EN nothing happens. I tried to add <code>db.Entry(anime).State = EntityState.Modified;</code> but then I get error: <code>An object with the same key already exists in the ObjectStateManager. The ObjectStateManager cannot track multiple objects with the same key.</code> Any way to solve this?</p> <p>Edit: I still have problem with this ;_;. I tried to add AsNoTracking() but then genres won't save. Please help...</p>
 

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