C#字符串处理之分割字符串并保留分隔符的几种方法

目录

• [方法一]

    string[] parts = Regex.Split(originalString, @"(?<=[.,;])")

• [方法二]

    public static IEnumerable<string> SplitAndKeep(this string s, char[] delims)
    {
  int start = 0, index;
  
  while ((index = s.IndexOfAny(delims, start)) != -1)
  {
      if(index-start > 0)
          yield return s.Substring(start, index - start);
      yield return s.Substring(index, 1);
      start = index + 1;
  }
  
  if (start < s.Length)
  {
      yield return s.Substring(start);
  }
    }

• [方法三]

    public static IEnumerable<string> SplitAndKeep(string s, params string[] delims)
    {
      var rows = new List<string>() { s };
      foreach (string delim in delims)//delimiter counter
      {
          for (int i = 0; i < rows.Count; i++)//row counter
          {
              int index = rows[i].IndexOf(delim);
              if (index > -1
                  && rows[i].Length > index + 1)
              {
                  string leftPart = rows[i].Substring(0, index + delim.Length);
                  string rightPart = rows[i].Substring(index + delim.Length);
                  rows[i] = leftPart;
                  rows.Insert(i + 1, rightPart);
              }
          }
      }
      return rows;
  }

具体可参考：https://stackoverflow.com/questions/521146/c-sharp-split-string-but-keep-split-chars-separators