Question

I have this function in my controller.

[HttpPost]
public ActionResult Edit(EmployeesViewModel viewModel)
{
    Employee employee = GetEmployee(viewModel.EmployeeId);
    TryUpdateModel(employee);

    if (ModelState.IsValid)
    {
        SaveEmployee(employee);
        TempData["message"] = "Employee has been saved.";
        return RedirectToAction("Details", new { id = employee.EmployeeID });
    }

    return View(viewModel); // validation error, so redisplay same view
}

It keeps failing, ModelState.IsValid keeps returning false and redisplaying the view. But I have no idea what the error is.

Is there a way to get the error and redisplay it to the user?

Answer 1

You can do this in your view without doing anything special in your action by using Html.ValidationSummary() to show all error messages, or Html.ValidationMessageFor() to show a message for a specific property of the model.

If you still need to see the errors from within your action or controller, see the ModelState.Errors property