how to check null value of Integer type field in ASP.NET MVC view?
- by Vikas
Hi,
I have integer type field in database which is having property "Not Null".
when i create a view & do a validation, if i left that field blank, it will consider it as 0 so i can not compare it with 0 because if someone insert a value 0 then it will be considered as error!
one another problem is that i am using Model error as described in the book "ASP.NET MVC 1.0" @ Scott Gu blog. And I am checking the value in partial class of object (created by LINQ-To-SQL). i.e
public partial class Person
{
public bool IsValid
{
get { return (GetRuleViolations().Count() == 0); }
}
public IEnumerable<RuleViolation> GetRuleViolations()
{
if (String.IsNullOrEmpty(Name))
yield return new RuleViolation("Name is Required", "Name");
if (Age == 0)
yield return new RuleViolation("Age is Required", "Age");
yield break;
}
partial void OnValidate(ChangeAction action)
{
if (!IsValid)
throw new ApplicationException("Rule violations prevent saving");
}
}
There is also problem with range.
Like in database if i declared as smallint i.e. short in c#, now if i exceed that range then it gives error as "A Value is reguired".
so finally is there any best way for validation in ASP.NET MVC?
