黑马程序员---Split用法

最新推荐文章于 2025-09-24 22:00:29 发布

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本文介绍了在C#中如何使用String.Split方法和正则表达式的Regex.Split方法进行字符串拆分，包括使用单个字符、多个字符及字符串作为分隔符，并展示了不同参数选项的效果。

1 、用字符串分隔：
using System.Text.RegularExpressions;
string str = " aaajsbbbjsccc " ;
string [] sArray = Regex.Split(str, " js " ,RegexOptions.IgnoreCase);
foreach ( string i in sArray) Response.Write(i.ToString() + " <br> " );
输出结果：
aaa
bbb
ccc
2 、用多个字符来分隔：
string str = " aaajbbbscccjdddseee " ;

string [] sArray = str.Split( new char [ 2 ] {j,s} );
foreach ( string i in sArray) Response.Write(i.ToString() + " <br> " );
输出结果：
aaa
bbb
ccc
ddd
eee
3 、用单个字符来分隔：
string str = " aaajbbbjccc " ;
string [] sArray = str.Split( j );
foreach ( string i in sArray) Response.Write(i.ToString() + " <br> " );
输出结果：
aaa
bbb
ccc

////////////////////////////////////////////////

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) ITPUB个人空间,n:H!C0M/S3Uu0002P

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
u0002w1I+Ch%^u0017}0string[] split = words.Split(new string[] { ",", "." }, StringSplitOptions.None);//返回:{"1","2",&q