c# 字符串验证（邮箱、电话、数字、ip、身份证等）

using System;
using System.Text.RegularExpressions;

namespace HuaTong.General.Utility
{
    /// <summary>
    /// 字符串验证
    /// </summary>
    public static class StringValidate
    {
        private static Regex RegNumeric = new Regex("^[0-9]+$");
        private static Regex RegNumericSign = new Regex("^[+-]?[0-9]+$");
        private static Regex RegDecimal = new Regex("^([0-9]+[.]?[0-9]+)|([0-9]+)$");
        private static Regex RegDecimalSign = new Regex("^[+-]?[0-9]+[.]?[0-9]+$");
        private static Regex RegEmail = new Regex(@"^\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$");
        private static Regex RegChina = new Regex("^[\u4e00-\u9fa5]*$");
        private static Regex RegPostcode = new Regex(@"^(\d{6})$");
        private static Regex RegUrl = new Regex(@"^(http|https|ftp|mms)?://([\w-]+\.)+[\w-]+(/[\w- ./?%&=]*)?$");
        private static Regex RegTEL = new Regex(@"^\d{6,8}|\d{3,4}-\d{6,8}$");
        private static Regex RegDate = new Regex(@"^\d{4}(\-|\/|\.)\d{1,2}(\-|\/|\.)\d{1,2}$");
        private static Regex RegMobile = new Regex(@"^1(3|4|5|7|8|9)\d{9}$");
        private static Regex RegUserName = new Regex("^([\u4E00-\u9FA5a-zA-Z0-9_-]){2,16}$");
        private static Regex RegIP = new Regex(@"^((2[0-4]\d|25[0-5]|[01]?\d\d?)\.){3}(2[0-4]\d|25[0-5]|[01]?\d\d?)$");
        private static Regex RegIdCard = new Regex(@"^(11|12|13|14|15|21|22|23|31|32|33|34|35|36|37|41|42|43|44|45|46|50|51|52|53|54|61|62|63|64|65|71|81|82|91)(\d{13}|\d{15}[\dxX])$");

        /// <summary>
        /// 自定义验证
        /// </summary>
        public static bool IsMatch(string value, string partten)
        {
            if (!string.IsNullOrEmpty(value))
            {
                Regex reg = new Regex(partten);
                Match m = reg.Match(value);
                return m.Success;
            }
            else
            {
                return false;
            }
        }

        /// <summary>
        /// 是否数字
        /// </summary>
        public static bool IsNumeric(string value)
        {
            if (!string.IsNullOrEmpty(value))
            {
                Match m = RegNumeric.Match(value);
                return m.Success;
            }
            else
            {
                return false;
            }
        }

        /// <summary>
        /// 是否数字 带正负号
        /// </summary>
        public static bool IsNumberSign(string value)
        {
            if (!string.IsNullOrEmpty(value))
            {
                Match m = RegNumericSign.Match(value);
                return m.Success;
            }
            else
            {
                return false;
            }
        }

        /// <summary>
        /// 是否是小数
        /// </summary>
        public static bool IsDecimal(string value)
        {
            if (!string.IsNullOrEmpty(value))
            {
                Match m = RegDecimal.Match(value);
                return m.Success;
            }
            else
            {
                return false;
            }
        }

        /// <summary>
        /// 是否是小数 带正负号
        /// </summary>
        public static bool IsDecimalSign(string value)
        {
            if (!string.IsNullOrEmpty(value))
            {
                Match m = RegDecimalSign.Match(value);
                return m.Success;
            }
            else
            {
                return false;
            }
        }

        /// <summary>
        /// 是否中文
        /// </summary>
        public static bool IsHasCHZN(string value)
        {
            if (!string.IsNullOrEmpty(value))
            {
                Match m = RegChina.Match(value);
                return m.Success;
            }
            else
            {
                return false;
            }
        }

        /// <summary>
        /// 是否是Email
        /// </summary>
        public static bool IsEmail(string value)
        {
            if (!string.IsNullOrEmpty(value))
            {
                Match m = RegEmail.Match(value);
                return m.Success;
            }
            else
            {
                return false;
            }
        }

        /// <summary>
        /// 是否是邮政编码
        /// </summary>
        public static bool IsPostcode(string value)
        {
            if (!string.IsNullOrEmpty(value))
            {
                Match m = RegPostcode.Match(value);
                return m.Success;
            }
            else
            {
                return false;
            }
        }

        /// <summary>
        /// 是否是URL
        /// </summary>
        public static bool IsUrl(string value)
        {
            if (!string.IsNullOrEmpty(value))
            {
                Match m = RegUrl.Match(value);
                return m.Success;
            }
            else
            {
                return false;
            }
        }

        /// <summary>
        /// 是否日期
        /// </summary>

        /// <returns></returns>
        public static bool IsDate(string value)
        {
            if (!string.IsNullOrEmpty(value))
            {
                Match m = RegDate.Match(value);
                return m.Success;
            }
            else
            {
                return false;
            }
        }

        /// <summary>
        /// 是否日期时间
        /// </summary>
        public static bool IsDatetime(string value)
        {
            DateTime time;
            return DateTime.TryParse(value, out time);
        }

        /// <summary>
        /// 是否为合法的电话号码
        /// </summary>
        public static bool IsTel(string value)
        {
            if (!string.IsNullOrEmpty(value))
            {
                Match m = RegTEL.Match(value);
                return m.Success;
            }
            else
            {
                return false;
            }
        }

        /// <summary>
        /// 是否为合法的手机号码
        /// </summary>
        public static bool IsMobile(string value)
        {
            if (!string.IsNullOrEmpty(value))
            {
                Match m = RegMobile.Match(value);
                return m.Success;
            }
            else
            {
                return false;
            }
        }

        /// <summary>
        /// 是否为合法的用户名 限中文/英文/数字/减号/下划线
        /// </summary>
        public static bool IsUserName(string value)
        {
            if (!string.IsNullOrEmpty(value))
            {
                Match m = RegUserName.Match(value);
                return m.Success;
            }
            else
            {
                return false;
            }
        }

        /// <summary>
        /// 是否为合法的IPv4地址
        /// </summary>
        public static bool IsIPAddress(string value)
        {
            if (!string.IsNullOrEmpty(value))
            {
                Match m = RegIP.Match(value);
                return m.Success;
            }
            else
            {
                return false;
            }
        }

        /// <summary>
        /// 判断对象是否为空
        /// </summary>
        public static bool IsNullOrEmpty(object value)
        {
            if (value == null)
            {
                return true;
            }
            if (value.GetType() == typeof(String))
            {
                if (string.IsNullOrEmpty(value.ToString().Trim()))
                {
                    return true;
                }
            }
            if (value.GetType() == typeof(DBNull))
            {
                return true;
            }

            //不为空
            return false;
        }

        /// <summary>
        /// 是否合法身份证号
        /// </summary>
        public static bool IsIdCard(string value)
        {
            if (!string.IsNullOrEmpty(value))
            {
                Match m = RegIdCard.Match(value);
                return m.Success;
            }
            else
            {
                return false;
            }
        }
    }
}