无法将int.32转换为System.Array错误

Question

我正在使用VS 2012 sql管理工作室，asp.net mvc DataAnnotations，我在验证十进制字段时遇到错误： 无法将int.32转换为System.Array

[Display(Name = "Porcentaje")]
    [MaxLength(21, ErrorMessage = "Máximo 21 caracteres")]
    [Required(ErrorMessage = "Requerido")]       
    [RegularExpression(@"^\$?\d+(\.(\d{2}))?$", ErrorMessage = "Número con 
dos decimales")]
    //[Range(0, 9999999999999999.99, ErrorMessage = "Máximo 18 dígitos")]
    public decimal porcentaje { get; set; }