[Solved] Grid not allow customize validation attribute

[Dio]

Hi all.

I use a customize validation attribute in my model. It is inherited from StringLengthAttribute, only specified resource file to support multiply language. But I seem in insert popup windows. There encounter a strange error "Error! The requested URL returned 404 - Not Found". Who know how to handle it?

    public class StringLengthMLAttribute : StringLengthAttribute
    {
        public StringLengthMLAttribute(int maximunLength)
            : base(maximunLength)
        {
            ErrorMessageResourceName = "ErrorStringLength";
            ErrorMessageResourceType = typeof(Messages);
        }
    }

    [KnownType(typeof(Project))]
    public class Project
    {
        [ScaffoldColumn(false)]
        public System.Guid id { get; set; }
 
        [Display(Name = "ProjectCode", ResourceType = typeof(LanguageDictionary))]
        [StringLengthML(1)]
        public string project_cd { get; set; }
      ......

[Dadv]

Are you sure that it is the Custom Validator the problem?

404 could be a lot of thing, did you try to remove it ?