EntityValidationException is thrown when saving my entity - entity-framework

Question

I got this message when debugged in catch (Exception e). When User fill in all the information, Address and Payment View will get the SalesOrderID and redirect to Complete View. But it didn't show the Complete when it done.
[HttpPost]
public ActionResult AddressAndPayment(SalesOrderHeader order,Customer customer, Address address ,FormCollection values)
{
ViewBag.PersonType = new SelectList(new[] { "EM", "SC", "VC", "IN" } // work
.Select(x => new { value = x, text = x }),
"value", "text");
try
{
if (string.Equals(values["PromoCode"], PromoCode, StringComparison.OrdinalIgnoreCase) == false)
{
return View(order);
}
else
{
order.AccountNumber = User.Identity.Name;
order.OrderDate = DateTime.Now;
address.ModifiedDate = DateTime.Now; // maybe this error
order.Address.PostalCode = "12345";
//Save Order
BikeDBs.SalesOrderHeaders.Add(order);
try
{
BikeDBs.SaveChanges();
}
catch (DbEntityValidationException e)
{
foreach (var entityValidationErrors in e.EntityValidationErrors)
{
foreach (var validationError in entityValidationErrors.ValidationErrors)
{
Console.WriteLine("Properties: {0} Error: {1}", validationError.PropertyName, validationError.ErrorMessage);
}
}
}
//Process Order
var cart = ShoppingCart.GetCart(this.HttpContext);
cart.CreateOrder(order);
//cart.CreateOrder(order1);
return RedirectToAction("Complete", new { id = order.SalesOrderID });
}
}
catch (Exception exception)
{
//Invalid - redisplay with errors
return View(order);
}
All I want is when the Order is saved, it will redirect to Complete. But in this case, it's not. And here is Address model:
public partial class Address
{
public Address()
{
this.SalesOrderHeaders = new HashSet<SalesOrderHeader>();
this.SalesOrderHeaders1 = new HashSet<SalesOrderHeader>();
}
public int AddressID { get; set; }
public string AddressLine1 { get; set; }
public string AddressLine2 { get; set; }
public string City { get; set; }
public int StateProvinceID { get; set; }
public string PostalCode { get; set; }
public System.Guid rowguid { get; set; }
[Required()]
public Nullable<System.DateTime> ModifiedDate { get; set; }
public virtual StateProvince StateProvince { get; set; }
public virtual ICollection<SalesOrderHeader> SalesOrderHeaders { get; set; }
public virtual ICollection<SalesOrderHeader> SalesOrderHeaders1 { get; set; }
}
What's a solution and how to fix it?

Answer 1

You can do this pretty easily by using the ModelState, it should catch it. If it doesn't I added code into your catch block to catch it and display the page again with the errors using ModelState.AddModelError.
[HttpPost]
public ActionResult AddressAndPayment(SalesOrderHeader order,Customer customer, Address address ,FormCollection values)
{
ViewBag.PersonType = new SelectList(new[] { "EM", "SC", "VC", "IN" } // work
.Select(x => new { value = x, text = x }),
"value", "text");
if(ModelState.IsValid)
{
try
{
if (string.Equals(values["PromoCode"], PromoCode, StringComparison.OrdinalIgnoreCase) == false)
{
return View(order);
}
else
{
order.AccountNumber = User.Identity.Name;
order.OrderDate = DateTime.Now;
order.Address.PostalCode = values["PostalCode"];
//Save Order
BikeDBs.SalesOrderHeaders.Add(order);
try
{
BikeDBs.SaveChanges();
}
catch (DbEntityValidationException e)
{
foreach (var entityValidationErrors in e.EntityValidationErrors)
{
foreach (var validationError in entityValidationErrors.ValidationErrors)
{
// If this far add errors to model errors and show view again.
ModelState.AddModelError(validationError.PropertyName, validationError.ErrorMessage);
Console.WriteLine("Properties: {0} Error: {1}", validationError.PropertyName, validationError.ErrorMessage);
}
}
return View(order);
}
//Process Order
var cart = ShoppingCart.GetCart(this.HttpContext);
cart.CreateOrder(order);
//cart.CreateOrder(order1);
return RedirectToAction("Complete", new { id = order.SalesOrderID });
}
}
catch (Exception exception)
{
//Invalid - redisplay with errors
return View(order);
}
}
return View(order);
}

Answer 2

For my answer I assume that the properties PostalCode and PersonType are of type string and are defined as not nullable.
I think the error messages you get clearly say what the problem is. The properties PostalCode and PersonType are required, that means they need to have a value other than null.
So when you do not set the properties to a value other than null and you try to save your entity you will get the error messages.
To fix it you will net to set the properties to some values (maybe a default value) or you have to change your EntityModel to specify that these properties are nullable