C#判断各种字符串(如手机号)
- using System;
- using System.Text.RegularExpressions;
- namespace MetarCommonSupport
- {
- /// <summary>
- /// 通过Framwork类库中的Regex类实现了一些特殊功能数据检查
- /// </summary>
- public class MetarnetRegex
- {
- private static MetarnetRegex instance = null;
- public static MetarnetRegex GetInstance()
- {
- if (MetarnetRegex.instance == null)
- {
- MetarnetRegex.instance = new MetarnetRegex();
- }
- return MetarnetRegex.instance;
- }
- private MetarnetRegex()
- {
- }
- /// <summary>
- /// 判断输入的字符串只包含汉字
- /// </summary>
- /// <param name="input"></param>
- /// <returns></returns>
- public static bool IsChineseCh(string input)
- {
- Regex regex = new Regex("^[\u4e00-\u9fa5]+$");
- return regex.IsMatch(input);
- }
- /// <summary>
- /// 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}
- /// </summary>
- /// <param name="input"></param>
- /// <returns></returns>
- 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);
- }
- /// <summary>
- /// 判断输入的字符串是否是一个合法的手机号
- /// </summary>
- /// <param name="input"></param>
- /// <returns></returns>
- public static bool IsMobilePhone(string input)
- {
- Regex regex = new Regex("^13\\d{9}$");
- return regex.IsMatch(input);
- }
- /// <summary>
- /// 判断输入的字符串只包含数字
- /// 可以匹配整数和浮点数
- /// ^-?\d+$|^(-?\d+)(\.\d+)?$
- /// </summary>
- /// <param name="input"></param>
- /// <returns></returns>
- public static bool IsNumber(string input)
- {
- string pattern = "^-?\\d+$|^(-?\\d+)(\\.\\d+)?$";
- Regex regex = new Regex(pattern);
- return regex.IsMatch(input);
- }
- /// <summary>
- /// 匹配非负整数
- ///
- /// </summary>
- /// <param name="input"></param>
- /// <returns></returns>
- public static bool IsNotNagtive(string input)
- {
- Regex regex = new Regex(@"^\d+$");
- return regex.IsMatch(input);
- }
- /// <summary>
- /// 匹配正整数
- /// </summary>
- /// <param name="input"></param>
- /// <returns></returns>
- public static bool IsUint(string input)
- {
- Regex regex = new Regex("^[0-9]*[1-9][0-9]*$");
- return regex.IsMatch(input);
- }
- /// <summary>
- /// 判断输入的字符串字包含英文字母
- /// </summary>
- /// <param name="input"></param>
- /// <returns></returns>
- public static bool IsEnglisCh(string input)
- {
- Regex regex = new Regex("^[A-Za-z]+$");
- return regex.IsMatch(input);
- }
- /// <summary>
- /// 判断输入的字符串是否是一个合法的Email地址
- /// </summary>
- /// <param name="input"></param>
- /// <returns></returns>
- public static bool IsEmail(string input)
- {
- string pattern = @"^([\w-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([\w-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$";
- Regex regex = new Regex(pattern);
- return regex.IsMatch(input);
- }
- /// <summary>
- /// 判断输入的字符串是否只包含数字和英文字母
- /// </summary>
- /// <param name="input"></param>
- /// <returns></returns>
- public static bool IsNumAndEnCh(string input)
- {
- string pattern = @"^[A-Za-z0-9]+$";
- Regex regex = new Regex(pattern);
- return regex.IsMatch(input);
- }
- /// <summary>
- /// 判断输入的字符串是否是一个超链接
- /// </summary>
- /// <param name="input"></param>
- /// <returns></returns>
- public static bool IsURL(string input)
- {
- //string pattern = @"http://([\w-]+\.)+[\w-]+(/[\w- ./?%&=]*)?";
- string pattern = @"^[a-zA-Z]+://(\w+(-\w+)*)(\.(\w+(-\w+)*))*(\?\S*)?$";
- Regex regex = new Regex(pattern);
- return regex.IsMatch(input);
- }
- /// <summary>
- /// 判断输入的字符串是否是表示一个IP地址
- /// </summary>
- /// <param name="input">被比较的字符串</param>
- /// <returns>是IP地址则为True</returns>
- public static bool IsIPv4(string input)
- {
- string[] IPs = input.Split(‘.‘);
- Regex regex = new Regex(@"^\d+$");
- 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;
- }
- /// <summary>
- /// 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
- /// </summary>
- /// <param name="input">需要计算的字符串</param>
- /// <returns>返回字符串的长度</returns>
- public static int GetCount(string input)
- {
- return Regex.Replace(input, @"[\u4e00-\u9fa5/g]", "aa").Length;
- }
- /// <summary>
- /// 调用Regex中IsMatch函数实现一般的正则表达式匹配
- /// </summary>
- /// <param name="pattern">要匹配的正则表达式模式。</param>
- /// <param name="input">要搜索匹配项的字符串</param>
- /// <returns>如果正则表达式找到匹配项,则为 true;否则,为 false。</returns>
- public static bool IsMatch(string pattern, string input)
- {
- Regex regex = new Regex(pattern);
- return regex.IsMatch(input);
- }
- /// <summary>
- /// 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。
- /// </summary>
- /// <param name="pattern">模式字符串</param>
- /// <param name="input">输入字符串</param>
- /// <param name="replacement">用于替换的字符串</param>
- /// <returns>返回被替换后的结果</returns>
- public static string Replace(string pattern, string input, string replacement)
- {
- Regex regex = new Regex(pattern);
- return regex.Replace(input, replacement);
- }
- /// <summary>
- /// 在由正则表达式模式定义的位置拆分输入字符串。
- /// </summary>
- /// <param name="pattern">模式字符串</param>
- /// <param name="input">输入字符串</param>
- /// <returns></returns>
- public static string[] Split(string pattern, string input)
- {
- Regex regex = new Regex(pattern);
- return regex.Split(input);
- }
- /// <summary>
- /// 判断输入的字符串是否是合法的IPV6 地址
- /// </summary>
- /// <param name="input"></param>
- /// <returns></returns>
- public static bool IsIPV6(string input)
- {
- string pattern = "";
- string temp = input;
- string[] strs = temp.Split(‘:‘);
- if (strs.Length > 8)
- {
- return false;
- }
- int count = MetarnetRegex.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}$
- * ******************************************************************/
- /// <summary>
- /// 判断字符串compare 在 input字符串中出现的次数
- /// </summary>
- /// <param name="input">源字符串</param>
- /// <param name="compare">用于比较的字符串</param>
- /// <returns>字符串compare 在 input字符串中出现的次数</returns>
- 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;
- }
- }
- }
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