为什么不能禁用datetime必需属性的MVC模型？

Question

Every thing is ok This model:

[Range(1, 24, ErrorMessage = "Invalid Hour")]
public int? val1{ get; set; }

on the other hand; this returns invalid error. if i dont write any value in EndDateTime:

public DateTime? EndDateTime { get; set; }

Controller:

if (!ModelState.IsValid)
    return View(myinstance);

return invalid enddatetime But i give nullable value property. i gave empty value on enddatetime, but return to me invalid enddatetime error.How to solve it?

Answer 1

It doesn't matter if the database accepts nulls. The ModelState will not return valid if the value does not pass the validation. Add a default value that will pass the validation.