#region License // Copyright (c) 2007 James Newton-King // // Permission is hereby granted, free of charge, to any person // obtaining a copy of this software and associated documentation // files (the "Software"), to deal in the Software without // restriction, including without limitation the rights to use, // copy, modify, merge, publish, distribute, sublicense, and/or sell // copies of the Software, and to permit persons to whom the // Software is furnished to do so, subject to the following // conditions: // // The above copyright notice and this permission notice shall be // included in all copies or substantial portions of the Software. // // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES // OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT // HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, // WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR // OTHER DEALINGS IN THE SOFTWARE. #endregion using System; using System.Collections.Generic; using System.IO; using System.Linq; using System.Text; using System.Text.RegularExpressions; namespace Newtonsoft.Utilities.Text { public static class StringExtensions { /// <summary> /// Truncates the specified string. /// </summary> /// <param name="s">The string to truncate.</param> /// <param name="maximumLength">The maximum length of the string before it is truncated.</param> /// <returns></returns> public static string Truncate(this string s, int maximumLength) { return Truncate(s, maximumLength, "..."); } /// <summary> /// Truncates the specified string. /// </summary> /// <param name="s">The string to truncate.</param> /// <param name="maximumLength">The maximum length of the string before it is truncated.</param> /// <param name="suffix">The suffix to place at the end of the truncated string.</param> /// <returns></returns> public static string Truncate(this string s, int maximumLength, string suffix) { if (suffix == null) throw new ArgumentNullException("suffix"); if (maximumLength <= 0) throw new ArgumentException("Maximum length must be greater than zero.", "maximumLength"); int subStringLength = maximumLength - suffix.Length; if (subStringLength <= 0) throw new ArgumentException("Length of suffix string is greater or equal to maximumLength"); if (s != null && s.Length > maximumLength) { string truncatedString = s.Substring(0, subStringLength); // incase the last character is a space truncatedString = truncatedString.TrimEnd(); truncatedString += suffix; return truncatedString; } else { return s; } } } }