问题描述
如何防止在mvc c#中重复输入? 我的主键是“ Locatie”
我的代码(控制器):
// GET: Parts/Create
public ActionResult Create()
{
return View();
}
// POST: Parts/Create
// To protect from overposting attacks,enable the specific properties you want to bind to,for
// more details see https://go.microsoft.com/fwlink/?LinkId=317598.
[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult Create([Bind(Include = "NaamComponent,Locatie,Waarde,Bestelnummer,Manufacturerpn,Omschrijving")] Parts parts)
{
if (ModelState.IsValid)
{
db.Parts.Add(parts);
db.SaveChanges();
return RedirectToAction("Index");
}
return View(parts);
}
解决方法
在您的控制器中使用以下代码:
public ActionResult Create([Bind(Include = "NaamComponent,Locatie,Waarde,Bestelnummer,ManufacturerPN,Omschrijving")] Parts parts)
{
if (ModelState.IsValid)
if (db.Parts.Any(part => part.Locatie == parts.Locatie))
{
ModelState.AddModelError("","Locatie naam is bezet.");
}
else
{
db.Parts.Add(parts);
db.SaveChanges();
return RedirectToAction("Index");
}
return View(parts);
}