C#中Split用法

C#中Split用法

1、用字符串分隔： 

输出结果：

2、用多个字符来分隔：

输出结果：

3、用单个字符来分隔：

输出结果：

 
string[] arr = str.Split("o");
        这是一个具有语法错误的语句，Split 的 separator 参数应该是 char[] 或 string[]，不应是字符串。正确的示例：
string str = "technology";
char[] separator = { 'o' };
string[] arr = str.Split(separator);

        String.Split 方法有6个重载函数：
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:
        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
        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
        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
        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
        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
        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(',').

转载于:https://www.cnblogs.com/crazygolf/p/3856651.html