Question

this is my first mvc 3 project, i am using linq to sql.

    public ActionResult Edit(int ID)
    {

        try
        {
            Tutorial tut = reposi.Tutorials.Single(d => d.TutorialID == ID);
            return View(tut);
        }
        catch
        {

            return RedirectToAction("List");
        }
    }

  [HttpPost]
    public ActionResult Edit(Tutorial tut)
    {
        if (ModelState.IsValid)
        {
            //tut.TutorialID = ID;
            tut.EditDate = DateTime.Now;

            tutContext.SubmitChanges();

            return RedirectToAction("List");
        }
        else
        {
            return View(tut);
        }
    }

after I click on the “Edit” button, It takes me back to list page, and changes are not saved. still old values.

Answer 1

You need to first get the Tutorial from your database, then make the changes, then SubmitChanges().

[HttpPost]
public ActionResult Edit(Tutorial tut)
{
    if (ModelState.IsValid)
    {
        Tutorial t = tutContext.get(tut.Id);

        //tut.TutorialID = ID;
        t.EditDate = DateTime.Now;

        tutContext.SubmitChanges();

        return RedirectToAction("List");
    }
    else
    {
        return View(tut);
    }
}

Note, your tutContext.get(tut.Id); may be different depending on your implementation.