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asp.net中split的用法

更多时间：2013-11-8 类别：编程学习浏览量：1350

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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