required attribute not working in asp.net mvc

Question

I have a simple strongly-typed view.

@model GoldForGold.Models.LogonModel
@{
    ViewBag.Title = \"Logins\";
    Layout = \"~/Views/Shared/_Layout.cshtml\";         


        

Answer 1

One other thing to be wary of with [Required] is when using it on an integer field, not just when storing a numeric value, but also, say, when storing the id of the selected value of a dropdown/select list.

[Required] won't work in that situation because an integer property can never be null and so always has a default value of zero. [Required] is checking that the property has a value, and zero is considered a value, so the check will pass.

In that case either declare the property as a nullable integer instead:

    [Required]
    public int? LanguageId { get; set; } // note the int is now nullable

or alternatively use the Range attribute to stop zero being an acceptable value:

    [Range(1, int.MaxValue)]
    public int LanguageId { get; set; }