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asp.net中split的用法

时间:2013-11-8类别:编程学习

asp.net中split的用法

asp.net中split的用法

 

语法


Split(expression[, delimiter[, count[, start]]])


Split 函数的语法有以下参数:


expression 必选。字符串表达式,包含子字符串和分隔符。如果 expression 为零长度字符串,Split 返回空数组,即不包含元素和数据的数组。


delimiter 可选。用于标识子字符串界限的字符。如果省略,使用空格 ("") 作为分隔符。如果 delimiter 为零长度字符串,则返回包含整个 expression 字符串的单元素数组。


count 可选。被返回的子字符串数目,-1 指示返回所有子字符串。


compare 可选。指示在计算子字符串时使用的比较类型的数值。compare 参数可以有以下值:
 

vbBinaryCompare 0 执行二进制比较。
vbTextCompare 1 执行文本比较。
 

String.Split 方法有6个重载函数:

 

  • 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)

  •  
  • 
    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)

  •  
  • 
    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)

  •  
  • 
    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)

  •  
  • 
    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)

  •  
  • 
    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)

  •  
  • 
    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(',')!

     

     

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