• 两个简单的扩展方法:TrimPrefix和TrimSuffix


    今天写程序频繁用到两中字符串操作:删除某个字符串指定的前缀和后缀。由于没有现成的方法可用,写了两个扩展方法:TrimPrefix和TrimSuffix。

       1: namespace System
       2: {
       3:     public static class StringExtensions
       4:     {
       5:         public static string TrimPrefix(this string sourceString, string prefix, bool ignoreCase = false)
       6:         {
       7:             prefix = prefix ?? string.Empty;
       8:             if(!sourceString.StartsWith(prefix,ignoreCase, CultureInfo.CurrentCulture))
       9:             {
      10:                 return sourceString;
      11:             }
      12:  
      13:             return sourceString.Remove(0, prefix.Length);
      14:         }
      15:  
      16:         public static string TrimSuffix(this string sourceString, string suffix, bool ignoreCase = false)
      17:         {
      18:             suffix = suffix ?? string.Empty;
      19:             if (!sourceString.EndsWith(suffix, ignoreCase, CultureInfo.CurrentCulture))
      20:             {
      21:                 return sourceString;
      22:             }
      23:             return sourceString.Substring(0, sourceString.Length - suffix.Length);
      24:         }
      25:     }
      26: }

    程序调用:

       1: static void Main(string[] args)
       2: {
       3:     string sourceString = "ABC123";
       4:     Console.WriteLine(sourceString.TrimPrefix("ABC"));
       5:     Console.WriteLine(sourceString.TrimSuffix("123"));
       6: }

    输出结果:

       1: 123
       2: ABC
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  • 原文地址:https://www.cnblogs.com/artech/p/1976285.html
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