比较全的字符串验证类

using System;
using System.Collections.Generic;
using System.Text;
using System.Text.RegularExpressions;
namespace Utility
{
    public class ISExt
    {
        private static ISExt instance = null;
        public static ISExt GetInstance()
        {
            if (ISExt.instance == null)
            {
                ISExt.instance = new ISExt();
            }
            return ISExt.instance;
        }
        private ISExt()
        {
        }
        ///
        /// 判断是否为数字
        ///
        /// 源字符串
        /// 返回值 true false
        public static bool IsNumberic(string oText)
        {
            try
            {
                int var1 = Convert.ToInt32(oText);
                return true;
            }
            catch (Exception ex)
            {
                LogWriter.AddSystemException(ex);
                return false;
            }
        }
        ///
        /// 判断输入的字符串只包含汉字
        ///
        ///
        ///
        public static bool IsChineseCh(string input)
        {
            Regex regex = new Regex("^[\u4e00-\u9fa5]+$");
            return regex.IsMatch(input);
        }
        ///
        /// 匹配3位或4位区号的电话号码,其中区号可以用小括号括起来,
        /// 也可以不用,区号与本地号间可以用连字号或空格间隔,
        /// 也可以没有间隔
        /// \(0\d{2}\)[- ]?\d{8}|0\d{2}[- ]?\d{8}|\(0\d{3}\)[- ]?\d{7}|0\d{3}[- ]?\d{7}
        ///
        ///
        ///
        public static bool IsPhone(string input)
        {
            string pattern = "^\\(0\\d{2}\\)[- ]?\\d{8}$|^0\\d{2}[- ]?\\d{8}$|^\\(0\\d{3}\\)[- ]?\\d{7}$|^0\\d{3}[- ]?\\d{7}$";
            Regex regex = new Regex(pattern);
            return regex.IsMatch(input);
        }
        /**/
        ///
        /// 转半角的函数(DBC case)
        ///
        /// 任意字符串
        /// 半角字符串
        ///
        ///全角空格为12288,半角空格为32
        ///其他字符半角(33-126)与全角(65281-65374)的对应关系是:均相差65248
        ///
        public static string ToDBC(string input)
        {
            char[] c = input.ToCharArray();
            for (int i = 0; i < c.Length; i++)
            {
                if (c[i] == 12288)
                {
                    c[i] = (char)32;
                    continue;
                }
                if (c[i] > 65280 && c[i] < 65375)
                    c[i] = (char)(c[i] - 65248);
            }
            return new string(c);
        }
        ///
        /// 转全角的函数(SBC case)
        ///
        /// 任意字符串
        /// 全角字符串
        ///
        ///全角空格为12288,半角空格为32
        ///其他字符半角(33-126)与全角(65281-65374)的对应关系是:均相差65248
        ///       
        public static string ToSBC(string input)
        {
            //半角转全角:
            char[] c = input.ToCharArray();
            for (int i = 0; i < c.Length; i++)
            {
                if (c[i] == 32)
                {
                    c[i] = (char)12288;
                    continue;
                }
                if (c[i] < 127)
                    c[i] = (char)(c[i] + 65248);
            }
            return new string(c);
        }

        ///
        /// 判断是否为小于9位的数字 内线电话
        ///
        ///
        ///
        public static bool IsInterphone(string input)
        {
            if (!IsDBC(input))
            {
                return false;
            }
            //input = ToDBC(input);
            if (input.Length < 9)
            {
                string pattern = "^-?\\d+$|^(-?\\d+)(\\.\\d+)?$";
                Regex regex = new Regex(pattern);
                return regex.IsMatch(input);
            }
            else
            {
                return false;
            }
        }
        ///
        /// 判断是否是全角
        ///
        /// 字符串
        ///
        public static bool IsSBC(string input)
        {
            if (2 * input.Length == Encoding.Default.GetByteCount(input))
            {
                return true;
            }
            else
            {
                return false;
            }
        }
        ///
        /// 判断是否是半角
        ///
        ///
        ///
        public static bool IsDBC(string input)
        {
            if (input.Length == Encoding.Default.GetByteCount(input))
            {
                return true;
            }
            else
            {
                return false;
            }
        }
        ///
        /// 判断输入的字符串是否是一个合法的手机号
        ///
        ///
        ///
        public static bool IsMobilePhone(string input)
        {
            Regex regex = new Regex("^13\\d{9}$");
            return regex.IsMatch(input);
        }

        ///
        /// 判断输入的字符串只包含数字
        /// 可以匹配整数和浮点数
        /// ^-?\d+$|^(-?\d+)(\.\d+)?$
        ///
        ///
        ///
        public static bool IsNumber(string input)
        {
            string pattern = "^-?\\d+$|^(-?\\d+)(\\.\\d+)?$";
            Regex regex = new Regex(pattern);
            return regex.IsMatch(input);
        }
        ///
        /// 匹配非负整数
        ///
        ///
        ///
        ///
        public static bool IsNotNagtive(string input)
        {
            Regex regex = new Regex(@"^\d+$");
            return regex.IsMatch(input);
        }
        ///
        /// 匹配正整数
        ///
        ///
        ///
        public static bool IsUint(string input)
        {
            Regex regex = new Regex("^[0-9]*[1-9][0-9]*$");
            return regex.IsMatch(input);
        }
        ///
        /// 判断输入的字符串字包含英文字母
        ///
        ///
        ///
        public static bool IsEnglisCh(string input)
        {
            Regex regex = new Regex("^[A-Za-z]+$");
            return regex.IsMatch(input);
        }

        ///
        /// 判断输入的字符串是否是一个合法的Email地址
        ///
        ///
        ///
        public static bool IsEmail(string input)
        {
            string pattern = @"^([\w-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([\w-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$";
            Regex regex = new Regex(pattern);
            return regex.IsMatch(input);
        }

        ///
        /// 判断输入的字符串是否只包含数字和英文字母
        ///
        ///
        ///
        public static bool IsNumAndEnCh(string input)
        {
            string pattern = @"^[A-Za-z0-9]+$";
            Regex regex = new Regex(pattern);
            return regex.IsMatch(input);
        }

        ///
        /// 判断输入的字符串是否是一个超链接
        ///
        ///
        ///
        public static bool IsURL(string input)
        {
            //string pattern = @"http://([\w-]+\.)+[\w-]+(/[\w- ./?%&=]*)?";
            string pattern = @"^[a-zA-Z]+://(\w+(-\w+)*)(\.(\w+(-\w+)*))*(\?\S*)?$";
            Regex regex = new Regex(pattern);
            return regex.IsMatch(input);
        }

        ///
        /// 判断输入的字符串是否是表示一个IP地址
        ///
        /// 被比较的字符串
        /// 是IP地址则为True
        public static bool IsIPv4(string input)
        {
            string[] IPs = input.Split('.');
            Regex regex = new Regex(@"^\d+$");
            for (int i = 0; i < IPs.Length; i++)
            {
                if (!regex.IsMatch(IPs[i]))
                {
                    return false;
                }
                if (Convert.ToUInt16(IPs[i]) > 255)
                {
                    return false;
                }
            }
            return true;
        }

        ///
        /// 计算字符串的字符长度,一个汉字字符将被计算为两个字符
        ///
        /// 需要计算的字符串
        /// 返回字符串的长度
        public static int GetCount(string input)
        {
            return Regex.Replace(input, @"[\u4e00-\u9fa5/g]", "aa").Length;
        }
        ///
        /// 调用Regex中IsMatch函数实现一般的正则表达式匹配
        ///
        /// 要匹配的正则表达式模式。
        /// 要搜索匹配项的字符串
        /// 如果正则表达式找到匹配项,则为 true;否则,为 false。
        public static bool IsMatch(string pattern, string input)
        {
            Regex regex = new Regex(pattern);
            return regex.IsMatch(input);
        }
        ///
        /// 从输入字符串中的第一个字符开始,用替换字符串替换指定的正则表达式模式的所有匹配项。
        ///
        /// 模式字符串
        /// 输入字符串
        /// 用于替换的字符串
        /// 返回被替换后的结果
        public static string Replace(string pattern, string input, string replacement)
        {
            Regex regex = new Regex(pattern);
            return regex.Replace(input, replacement);
        }
        ///
        /// 在由正则表达式模式定义的位置拆分输入字符串。
        ///
        /// 模式字符串
        /// 输入字符串
        ///
        public static string[] Split(string pattern, string input)
        {
            Regex regex = new Regex(pattern);
            return regex.Split(input);
        }
        ///
        /// 判断输入的字符串是否是合法的IPV6 地址
        ///
        ///
        ///
        public static bool IsIPV6(string input)
        {
            string pattern = "";
            string temp = input;
            string[] strs = temp.Split(':');
            if (strs.Length > 8)
            {
                return false;
            }
            int count = ISExt.GetStringCount(input, "::");
            if (count > 1)
            {
                return false;
            }
            else if (count == 0)
            {
                pattern = @"^([\da-f]{1,4}:){7}[\da-f]{1,4}$";
                Regex regex = new Regex(pattern);
                return regex.IsMatch(input);
            }
            else
            {
                pattern = @"^([\da-f]{1,4}:){0,5}::([\da-f]{1,4}:){0,5}[\da-f]{1,4}$";
                Regex regex1 = new Regex(pattern);
                return regex1.IsMatch(input);
            }
        }
        /* *******************************************************************
        * 1、通过“:”来分割字符串看得到的字符串数组长度是否小于等于8
        * 2、判断输入的IPV6字符串中是否有“::”。
        * 3、如果没有“::”采用 ^([\da-f]{1,4}:){7}[\da-f]{1,4}$ 来判断
        * 4、如果有“::” ,判断"::"是否止出现一次
        * 5、如果出现一次以上 返回false
        * 6、^([\da-f]{1,4}:){0,5}::([\da-f]{1,4}:){0,5}[\da-f]{1,4}$
        * ******************************************************************/
        ///
        /// 判断字符串compare 在 input字符串中出现的次数
        ///
        /// 源字符串
        /// 用于比较的字符串
        /// 字符串compare 在 input字符串中出现的次数
        private static int GetStringCount(string input, string compare)
        {
            int index = input.IndexOf(compare);
            if (index != -1)
            {
                return 1 + GetStringCount(input.Substring(index + compare.Length), compare);
            }
            else
            {
                return 0;
            }
        }

    }
}

摘自:网络

posted @ 2009-06-25 17:05  iDEAAM  阅读(292)  评论(0编辑  收藏  举报