dotnet编程C#语言的Split函数的各种用法

1、Split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、Split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、Split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/S3U\u0002P
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","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ITPUB个人空间1K
e\u0007f\u0008f }\u0011C n
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(',')