public ActionResult Index(SumViewModel model)
{
if (!this.ModelState.IsValid)
{
return this.RedirectToAction("Index", "Home", new { isValid = true });
}
model.TotalSum = model.FirstNumber + model.SecondNumber;
return this.RedirectToAction("Index", "Home", new { totalSum = model.TotalSum, isValid = false });
}
public ActionResult Index(decimal? totalSum, bool isValid = false)
{
var sum = new SumViewModel
{
FirstNumber = 0m,
SecondNumber = 0m,
TotalSum = totalSum ?? 0
};
this.ViewBag.IsValid = isValid;
return this.View(sum);
}
