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C#的String.Split 分割字符串用法详解

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String.Split 方法有6个重载函数:

程序代码 程序代码

1) public string[] Split(params char[] separator)
2) public string[] Split(char[] separator, int count)
3) public string[] Split(char[] separator, StringSplitOptions options)
4) public string[] Split(string[] separator, StringSplitOptions options)
5) public string[] Split(char[] separator, int count, StringSplitOptions options)
6) public string[] Split(string[] separator, int count, StringSplitOptions options)

                                下边我们通过一些实例来说明下怎么使用(以下string words = "1,2.3,,4";):
  1. public string[] Split(params char[] separator) 程序代码 程序代码 string[] split = words.Split;(new Char[] { ',' });//返回:{"1","2.3","","4"} string[] split = words.Split;(new Char[] { ',', '.' });//返回:{"1","2","3","","4"}

  2. public string[] Split(char[] separator, int count) 程序代码 程序代码 string[] split = words.Split;(new Char[] { ',', '.' }, 2);//返回:{"1","2.3,,4"} string[] split = words.Split;(new Char[] { ',', '.' }, 6);//返回:{"1","2","3","","4"}

  3. public string[] Split(char[] separator, StringSplitOptions options) 程序代码 程序代码 string[] split = words.Split;(new Char[] { ',', '.' }, StringSplitOptions.RemoveEmptyEntries;);//返回:{"1","2","3","4"} 不保留空元素 string[] split = words.Split;(new Char[] { ',', '.' }, StringSplitOptions.None;);//返回:{"1","2","3","","4"} 保留空元素

  4. public string[] Split(string[] separator, StringSplitOptions options) 程序代码 程序代码 string[] split = words.Split;(new string[] { ",", "." }, StringSplitOptions.RemoveEmptyEntries;);//返回:{"1","2","3","4"} 不保留空元素 string[] split = words.Split;(new string[] { ",", "." }, StringSplitOptions.None;);//返回:{"1","2","3","","4"} 保留空元素

  5. public string[] Split(char[] separator, int count, StringSplitOptions options) 程序代码 程序代码 string[] split = words.Split;(new Char[] { ',', '.' }, 2, StringSplitOptions.RemoveEmptyEntries;);//返回:{"1","2.3,,4"} 不保留空元素 string[] split = words.Split;(new Char[] { ',', '.' }, 6, StringSplitOptions.None;);//返回:{"1","2","3","","4"} 保留空元素

  6. public string[] Split(string[] separator, int count, StringSplitOptions options) 程序代码 程序代码 string[] split = words.Split;(new string[] { ",", "." }, 2, StringSplitOptions.RemoveEmptyEntries;);//返回:{"1","2.3,,4"} 不保留空元素 string[] split = words.Split;(new string[] { ",", "." }, 6, StringSplitOptions.None;);//返回:{"1","2","3","","4"} 保留空元素

需要注意的是没有重载函数public string[] Split(string[] separator),所以我们不能像VB.NET那样使用words.Split(","),而只能使用words.Split(',')!很多人都很奇怪为什么把双引号改为单引号就可以了?看了上边的重载函数该知道答案了吧^_^

标签:split,字符串分割,C#

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