using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Text;

namespace Sai.Toolkit.Mvvm.Attributes
{
    [AttributeUsage(AttributeTargets.Property | AttributeTargets.Field | AttributeTargets.Parameter)]
    public class UndefinedCharAttribute : ValidationAttribute
    {
        public UndefinedCharAttribute(params char[] chars)
        {
            Chars = chars;
        }

        public char[] Chars { get; }

        protected override ValidationResult IsValid(object value, ValidationContext validationContext)
        {
            //char[] chars = new[] { '\\', ':', '{', '}', '[', ']', '|', ';', '<', '>', '?', '`', '~' };
            if (value != null)
            {
                foreach (var c in Chars)
                {
                    if (value.ToString().IndexOf(c) > -1)
                    {
                        return new ValidationResult($"输入字符不合法,名称不能包含字符:'\\ : [ ] | {{}}; < > ? ` ~");
                    }
                }
            }
            return ValidationResult.Success;
        }
    }
}