字符串帮助类
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#region 格式化 /// <summary> /// 格式化 /// </summary> /// <param name="sInput">本身字符串</param> /// <param name="args"></param> /// <returns></returns> public static string format(this string sInput, params object[] args) { return String.Format(sInput, args); } #endregion #region 倒转字符串 /// <summary> /// 倒转字符串 /// </summary> public static string Reverse(this string sInput) { char[] chars = sInput.ToCharArray(); Array.Reverse(chars); return new String(chars); } #endregion #region 判断是否为email /// <summary> /// 判断是否为email /// </summary> /// <param name="email"></param> /// <returns></returns> public static bool IsEmail(string email) { if (string.IsNullOrWhiteSpace(email)) { return false; } string pattern = "\\w+([-+.']\\w+)*@\\w+([-.]\\w+)*\\.\\w+([-.]\\w+)*"; return Regex.IsMatch(email, pattern, RegexOptions.IgnoreCase | RegexOptions.Compiled); } #endregion #region 判断是否为手机号 /// <summary> /// 判断是否为手机号 /// </summary> /// <param name="mobile"></param> /// <returns></returns> public static bool IsMobile(string mobile) { if (string.IsNullOrWhiteSpace(mobile)) { return false; } string pattern = "^(13|15|18)[0-9]{9}$"; return Regex.IsMatch(mobile, pattern, RegexOptions.IgnoreCase | RegexOptions.Compiled); } #endregion #region 判断是否为电话 /// <summary> /// 判断是否为电话 /// </summary> /// <param name="phone">0755-45784678-85</param> /// <returns></returns> public static bool IsPhone(string phone) { if (string.IsNullOrWhiteSpace(phone)) { return false; } string pattern = "^(([0-9]{3,4})|[0-9]{3,4}-)?[0-9]{7,8}(-[0-9]{2,4})?$"; return Regex.IsMatch(phone, pattern, RegexOptions.IgnoreCase | RegexOptions.Compiled); } #endregion #region 判断是否为邮编 /// <summary> /// 判断是否为邮编 /// </summary> /// <param name="phone">415118</param> /// <returns></returns> public static bool IsPostCode(string postcode) { if (string.IsNullOrWhiteSpace(postcode)) { return false; } string pattern = "^[0-9]{6}$"; return Regex.IsMatch(postcode, pattern, RegexOptions.IgnoreCase | RegexOptions.Compiled); } #endregion #region 是否有效的姓名 /// <summary> /// 是否有效的姓名 /// </summary> /// <param name="name"></param> /// <returns></returns> public static bool IsValidName(string name) { if (string.IsNullOrWhiteSpace(name)) { return false; } string pattern = "^(([\u4e00-\u9fa5]{2,5})|([a-zA-Z]{1,10}[a-zA-Z. ]{1,20}[a-zA-Z]{1,10}))$"; return Regex.IsMatch(name, pattern, RegexOptions.IgnoreCase | RegexOptions.Compiled); } #endregion #region 是否有效的中文名 /// <summary> /// 是否有效的中文名 /// </summary> /// <param name="name"></param> /// <returns></returns> public static bool IsValidChineseName(string name) { if (string.IsNullOrWhiteSpace(name)) { return false; } string pattern = "^[\u4e00-\u9fa5]{2,5}$"; return Regex.IsMatch(name, pattern, RegexOptions.IgnoreCase | RegexOptions.Compiled); } #endregion #region 是否为正确的QQ号 /// <summary> /// 是否为正确的QQ号 /// </summary> /// <param name="qq"></param> /// <returns></returns> public static bool IsQQ(string qq) { if (string.IsNullOrWhiteSpace(qq)) { return false; } string pattern = "^[1-9][0-9]{4,}$"; return Regex.IsMatch(qq, pattern, RegexOptions.IgnoreCase | RegexOptions.Compiled); } #endregion #region 是否数字 /// <summary> /// 是否数字 /// </summary> /// <param name="sNumeric"></param> /// <returns></returns> public static bool IsNumeric(string sNumeric) { return (new Regex("^[\\+\\-]?[0-9]*\\.?[0-9]+$")).IsMatch(sNumeric); } #endregion #region 是否整数 /// <summary> /// 是否整数 /// </summary> /// <param name="sNumeric"></param> /// <returns></returns> public static bool IsInt(string intString) { return (new Regex("^[\\+\\-]?[0-9]+$")).IsMatch(intString); } #endregion #region 是否为正整数 /// <summary> /// 是否为正整数 /// </summary> /// <param name="sNumeric"></param> /// <returns></returns> public static bool IsPosInt(string intString) { return (new Regex("^[0-9]*[1-9][0-9]*$")).IsMatch(intString); } #endregion #region 自定义截取字符串 /// <summary> /// 自定义截取字符串 /// </summary> /// <param name="str">待截取的字符串</param> /// <param name="len">长度</param> /// <param name="hasDots">是否带"..."</param> /// <returns></returns> public static string SubString(string str, int len, bool hasDots) { if (string.IsNullOrWhiteSpace(str)) return string.Empty; string dots = string.Empty; if (len >= str.Length) return str; if (hasDots) dots = "..."; return str.Substring(0, len) + dots; } #endregion #region 取得客户端IP地址 //获取客户端IP public static string GetClientIP() { string result = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"]; if (null == result || result == String.Empty) { result = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"]; } if (null == result || result == String.Empty) { result = HttpContext.Current.Request.UserHostAddress; } if (null == result || result == String.Empty) { return "0.0.0.0"; } if (result.Equals("::1")) { return "127.0.0.1"; } return result; } /// <summary> /// 将最后一位数字换为* /// </summary> /// <param name="ip">输入的ip</param> /// <returns></returns> public static string FilterLastNum(string ip) { string result = string.Empty; string[] s = ip.Split('.'); for (int i = 0; i < s.Length - 1; i++) { result += s[i] + "."; } result += "*"; return result; } #endregion #region 将ID字符串转化为int数组 /// <summary> /// 将ID字符串转化为int数组,默认使用空格和逗号分割 /// </summary> /// <param name="idString"></param> /// <param name="splitChars"> </param> /// <returns></returns> public static List<int> ConvertFromIdString(string idString,params char[] splitChars) { if (!string.IsNullOrWhiteSpace(idString)) { List<string> strings; if(splitChars == null||splitChars.Length == 0) { strings = idString.Split(new []{' ', ','}, StringSplitOptions.RemoveEmptyEntries).ToList(); } else { strings = idString.Split(splitChars, StringSplitOptions.RemoveEmptyEntries).ToList(); } return strings.ConvertAll(DataTypeHelper.GetInt32); } return new List<int>(); } #endregion #region 获取合法的主键字符串 /// <summary> /// 获取合法的主键字符串，比如 1,3,6,7 /// </summary> /// <param name="strKeys"></param> /// <returns></returns> public static String GetLegalKeyStr(String strKeys) { if (String.IsNullOrWhiteSpace(strKeys)) { return String.Empty; } List<String> list = new List<String>(); foreach (String key in strKeys.Split(',', ' ')) { if (Regex.IsMatch(key, @"^[0-9]+$", RegexOptions.Compiled)) { list.Add(key); } } list.Sort(); return String.Join(",", list.Distinct().ToArray()); } #endregion #region 获取合法的字典字符串 /// <summary> /// 获取合法的字典字符串，比如 a,b,d,e /// </summary> /// <param name="strKeys"></param> /// <returns></returns> public static string GetLegalDictKey(string strKeys) { if (string.IsNullOrWhiteSpace(strKeys)) { return string.Empty; } strKeys = strKeys.ToLower(); strKeys = Regex.Replace(strKeys, "[^,a-z0-9_]", string.Empty, RegexOptions.Compiled); strKeys = Regex.Replace(strKeys, "[,]{2,}", ",", RegexOptions.Compiled); strKeys = strKeys.Trim(','); return strKeys; } #endregion #region 获取合法的主键字符串 /// <summary> /// 获取前后有,的主键字符串，比如 ,1,3,6,7, /// </summary> /// <param name="strKeys"></param> /// <returns></returns> public static string GetWrapedKeyStr(string strKeys) { return strKeys = string.Format(",{0},", GetLegalKeyStr(strKeys)); } #endregion #region 获取合法的字典字符串 /// <summary> /// 获取有'的字典字符串，比如 'a','b','c','d' /// </summary> /// <param name="strKeys"></param> /// <returns></returns> public static string GetWrapedDictKey(string strKeys) { strKeys = GetLegalDictKey(strKeys); if (string.IsNullOrEmpty(strKeys)) { return string.Empty; } strKeys = strKeys.Replace(",", "','"); return strKeys = string.Format("'{0}'", strKeys); } #endregion #region 转换文件大小 /// <summary> /// 转换文件大小 /// </summary> /// <param name="fileSize"></param> /// <returns></returns> public static String FormatFileSize(long fileSize) { String fileSizeString = ""; if (fileSize < 1024) { fileSizeString = fileSize + " B"; } else if (fileSize < 1024 * 1024) { fileSizeString = String.Format("{0:F2}", (double)fileSize / 1024) + " K"; } else if (fileSize < 1024 * 1024 * 1024) { fileSizeString = String.Format("{0:F2}", (double)fileSize / (1024 * 1024)) + " M"; } else { fileSizeString = String.Format("{0:F2}", (double)fileSize / (1024 * 1024 * 1024)) + " G"; } return fileSizeString; } #endregion #region 通过正则匹配获取值 /// <summary> /// 通过正则匹配获取值 /// </summary> /// <param name="input"></param> /// <param name="pattern"></param> /// <returns></returns> public static GroupCollection GetPatternValue(string input, string pattern) { if (string.IsNullOrWhiteSpace(input)) { return null; } Match match = Regex.Match(input, pattern, RegexOptions.IgnoreCase | RegexOptions.Compiled); if (match.Success && match.Groups.Count > 0) { return match.Groups; } return null; } /// <summary> /// 通过正则匹配获取值 /// </summary> /// <param name="input"></param> /// <param name="pattern"></param> /// <returns></returns> public static MatchCollection GetPatternValues(string input, string pattern) { if (string.IsNullOrWhiteSpace(input)) { return null; } MatchCollection match = Regex.Matches(input, pattern, RegexOptions.IgnoreCase | RegexOptions.Compiled); return match; } #endregion #region 合并路径 /// <summary> /// 合并路径 /// </summary> /// <param name="separator"></param> /// <param name="path1"></param> /// <param name="path2"></param> /// <returns></returns> public static string CombinPath(char separator, string path1, string path2) { if (string.IsNullOrWhiteSpace(path1) || string.IsNullOrWhiteSpace(path2)) { return path1 ?? path2; } bool b1 = path1[path1.Length - 1] == separator; bool b2 = path2[0] == separator; if (b1 && b2) { return path1 + path2.TrimStart(separator); } if (b1 || b2) { return path1 + path2; } return string.Concat(path1, separator, path2); } /// <summary> /// 合并路径 /// </summary> /// <param name="separator"></param> /// <param name="paths"></param> /// <returns></returns> public static string CombinPath(char separator, params string[] paths) { if (paths == null || paths.Length == 0) { return string.Empty; } else if (paths.Length == 1) { return paths[0]; } System.Text.StringBuilder sb = new System.Text.StringBuilder(paths[0]); for (int i = 1; i < paths.Length; ++i) { string path = paths[i]; if (string.IsNullOrEmpty(path)) { continue; } bool b1 = sb[sb.Length - 1] == separator; bool b2 = path[0] == separator; if (b1 && b2) { sb.Append(path.TrimStart(separator)); } else if (b1 || b2) { sb.Append(path); } else { sb.Append(separator); sb.Append(path); } } return sb.ToString(); } #endregion #region 计算页数 /// <summary> /// 计算页数 /// </summary> /// <param name="totalRecordCount"></param> /// <param name="pageSize"></param> /// <returns></returns> public static int GetPageCount(int totalRecordCount, int pageSize) { return Convert.ToInt32(Math.Ceiling((double)totalRecordCount / pageSize)); } #endregion #region 版本比较 /// <summary> /// 版本比较 /// </summary> /// <param name="version1"></param> /// <param name="version2"></param> /// <returns></returns> public static int CompareVersion(string version1, string version2) { version1 = Regex.Replace(version1, "[^0-9.]", "", RegexOptions.Compiled); version2 = Regex.Replace(version2, "[^0-9.]", "", RegexOptions.Compiled); if (string.IsNullOrEmpty(version1) || string.IsNullOrEmpty(version2)) { return string.Compare(version1, version2); } Version v1 = new Version(version1); Version v2 = new Version(version2); return v1.CompareTo(v2); } #endregion #region 将字符串形式的IP转换位long ///<summary> /// 将字符串形式的IP转换位long ///</summary> ///<param name="ipAddress"></param> ///<returns></returns> public static long IpToLong(string ipAddress) { if (string.IsNullOrWhiteSpace(ipAddress)) return 0; byte[] ip_bytes = new byte[8]; string[] strArr = ipAddress.Split(new char[] { '.' }); if (strArr.Length != 4) return 0; for (int i = 0; i < 4; i++) { byte b = 0; if (byte.TryParse(strArr[3 - i], out b)) { ip_bytes[i] = b; } else { return 0; } } return BitConverter.ToInt64(ip_bytes, 0); } #endregion #region 混淆密码(如将123456变为1****6) /// <summary> /// 混淆密码(如将123456变为1****6) /// </summary> /// <param name="passwd"></param> /// <returns></returns> public static string MixPasswd(string passwd) { if (string.IsNullOrEmpty(passwd)) return string.Empty; char[] newPasswd = new char[passwd.Length]; int mixed = 0; int i = 0; Random rand = new Random(); foreach (char ch in passwd) { if (rand.Next(100) > 55) { ++mixed; newPasswd[i++] = '*'; } else { newPasswd[i++] = ch; } } i = 0; while (mixed < passwd.Length / 2) // 至少一半替换为* { if (newPasswd[i] != '*') { ++mixed; newPasswd[i++] = '*'; } } return new string(newPasswd); } #endregion #region 日期 /// <summary> /// 判断今天是第几周 /// </summary> /// <param name="date"></param> /// <returns></returns> public static int WeekNumber(DateTime date) { string firstDateText = date.Year + "-1-1"; DateTime firstDay = Convert.ToDateTime(firstDateText); int theday; switch (firstDay.DayOfWeek) { case DayOfWeek.Monday: theday = -1; break; case DayOfWeek.Tuesday: theday = 0; break; case DayOfWeek.Wednesday: theday = 1; break; case DayOfWeek.Thursday: theday = 2; break; case DayOfWeek.Friday: theday = 3; break; case DayOfWeek.Saturday: theday = 4; break; default: theday = 5; break; } int weekNum = (date.DayOfYear + theday) / 7 + 1; return weekNum; } /// <summary> /// 年内某周的日期范围 /// </summary> /// <param name="yearNum"></param> /// <param name="weekNum"></param> /// <returns></returns> public static String WeekRange(int yearNum, int weekNum) { DateTime firstOfYear = new DateTime(yearNum, 1, 1); System.DayOfWeek dayofweek = firstOfYear.DayOfWeek; DateTime stand = firstOfYear.AddDays(weekNum * 7); DateTime start = default(DateTime); DateTime end = default(DateTime); switch (dayofweek) { case DayOfWeek.Monday: start = stand.AddDays(0); end = stand.AddDays(6); break; case DayOfWeek.Tuesday: start = stand.AddDays(-1); end = stand.AddDays(5); break; case DayOfWeek.Wednesday: start = stand.AddDays(-2); end = stand.AddDays(4); break; case DayOfWeek.Thursday: start = stand.AddDays(-3); end = stand.AddDays(3); break; case DayOfWeek.Friday: start = stand.AddDays(-4); end = stand.AddDays(2); break; case DayOfWeek.Saturday: start = stand.AddDays(-5); end = stand.AddDays(1); break; default: start = stand.AddDays(-6); end = stand.AddDays(0); break; } return start.ToString("yyyy/MM/dd") + " — " + end.ToString("yyyy/MM/dd"); } #endregion 0 0
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