using System;
using System.ComponentModel.DataAnnotations;
using System.Linq;

namespace Szmedi.RvKits.Attributes
{
    [AttributeUsage(AttributeTargets.Property | AttributeTargets.Field | AttributeTargets.Parameter)]
    public sealed class IsNumericAttribute : ValidationAttribute
    {
        protected override ValidationResult IsValid(object value, ValidationContext validationContext)
        {
            return double.TryParse(value.ToString(), out double _) ? ValidationResult.Success : new("输入内容不是数值。");
        }
    }
}