using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Muchinfo.PC.Common.Helpers
{
    public class TextValidationHelper
    {
        /// <summary>
        /// 验证账号是否合法
        /// </summary>
        /// <param name="account"></param>
        /// <returns></returns>
        public static bool VaildLoginAccount(string srt)
        {
            if (!string.IsNullOrEmpty(srt))
            {
                foreach (var item in srt.ToArray())
                {
                    if (item >= 'A' && item <= 'Z' ||
                        item >= 'a' && item <= 'z' ||
                        item >= '0' && item <= '9'
                        )
                        continue;
                    else
                    {
                        return false;
                    }
                }
                return true;
            }
            return false;
        }

        /// <summary>
        /// 相差月份
        /// </summary>
        /// <param name="d1"></param>
        /// <param name="d2"></param>
        /// <returns></returns>
        public static int DifferMonth(DateTime d1, DateTime d2)
        { 
            DateTime max = d1 > d2 ? d1 : d2; 
            DateTime min = d1 > d2 ? d2 : d1;
            int yeardiff = max.Year - min.Year; 
            int monthdiff = max.Month - min.Month;
            return yeardiff * 12 + monthdiff + 1; 
        }

    }
}