Question

Is it possible to use a data-annotation attribute for dropdownlists to be valid, only if the user selects an option different from one with the value o (zero).
The option with value o (zero) is “Please Select an account”, which is selected by default.
I used [Required] attribute to validate this dropdownlist, but it doesn’t have any effect, because, how I said, by default the option with value o (zero)- “Please Select an account”- is selected.

Answer 1

Something like:

[Range(1, int.MaxValue, ErrorMessage = "Please enter a value bigger than {1}")]
public int Value { get; set; }