Question

in my mvc 3 app with ef code first i have a database with 1 table

the column field is

ID

TIME1 Double
TIME2 Double
TIME3 Double

I need time3 is the result of the multiplication of time1 and time2 … I did it with viewbag

Viewbag.Text = db.persons.Sum(o => o.Time1 * o.Time2);

But howunfortunately I can not associate the field Time3 the result … here is my controller and view

        public ActionResult Create()
    {
        return View();
    } 

    [HttpPost]
    public ActionResult Create(Person person)
    {
        person.Tempo3 = db.persons.Sum(o => o.Tempo1 * o.Tempo2);
        if (ModelState.IsValid)
        {

            db.persons.Add(person);
            db.SaveChanges();
            return RedirectToAction("Index");  
        }

        return View(person);
    }

}

@using (Html.BeginForm()) {@Html.EditorFor(model => model.Tempo1) @Html.EditorFor(model => model.Tempo2) @Html.HiddenFor(model => model.Tempo3)

With HiddenFor the calculate don’t work…how do this with linq query? thanks

Answer 1

Try something like this :

[HttpPost]
public ActionResult Create(Person person)
{

    if (ModelState.IsValid)
    {
        newPerson = new db.persons {Tempo1 = person.Tempo1, Tempo2 = person.Tempo2};
        newPerson.Tempo3 = peson.Tempo1 * person.Tempo2; 

        db.persons.Add(newPerson);
        db.SaveChanges();
        return RedirectToAction("Index");  
    }

    return View(person);
}