Question

I am trying to edit customer with username which is using User.Identity.Name.

I don’t know how to write Where condition in controller.

It looks easy. Could you help me? thanks.

Here is my coding.

[Authorize]
    public ActionResult Edit()
    {
        //the username gets username through User.Identity.Name.
        string username = User.Identity.Name;

        //How can I write below coding?
        //In DB, it has userName field.

        Customer customer = db.Customer.Where(userName = username);
        return View(customer);
    }

[HttpPost]
    public ActionResult Edit(Customer customer)
    {
        if (ModelState.IsValid)
        {
            db.Entry(customer).State = EntityState.Modified;
            db.SaveChanges();
            return RedirectToAction("Index");
        }
        return View(customer);
    }

Answer 1

You need to learn how lambda expressions work:

.Where(c => c.UserName == username)

c is the implicitly-typed parameter.

Also, if you want a single result, you should call FirstOrDefault() instead; Where() returns a sequence.