cms_thermo_active/Step/Attributes/PositiveNumberAttribute.cs

using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Step.Attributes
{
    public class PositiveNumberAttribute : ValidationAttribute
    {
        private double _val;

        public PositiveNumberAttribute(double val)
        {
            _val = val;
        }

        protected override ValidationResult IsValid(object value, ValidationContext validationContext)
        {


            return ValidationResult.Success;
        }
    }
}