C#中Split用法【轉】

https://www.cnblogs.com/webenh/p/6570801.html

一、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>");
輸出結果：
aaa
bbb
ccc
二、用多個字符來分隔：
string str="aaajbbbscccjdddseee"; 

string[] sArray=str.Split(new char[2] {'j','s'}); 
foreach(string i in sArray) Response.Write(i.ToString() + "<br>"); 
輸出結果：
aaa
bbb
ccc
ddd
eee
三、用單個字符來分隔：
string str="aaajbbbjccc";
string[] sArray=str.Split('j');
foreach(string i in sArray) Response.Write(i.ToString() + "<br>");
輸出結果：
aaa
bbb
ccc

 

 

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

string[] arr = str.Split("o");

這是一個具備語法錯誤的語句，Split 的 separator 參數應該是 char[] 或 string[]，不該是字符串。正確的示例：

string str = "technology";
char[] separator = { 'o' };
string[] arr = str.Split(separator);

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

String.Split 方法有6個重載函數：

程序代碼

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)

下邊咱們經過一些實例來講明下怎麼使用(如下string words = "1,2.3,,4";)：
1. public string[] Split(params char[] separator)

程序代碼

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)

程序代碼

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)

程序代碼

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)

程序代碼

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)

程序代碼

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)

程序代碼

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

須要注意的是沒有重載函數public string[] Split(string[] separator)，因此咱們不能像VB.NET那樣使用words.Split(",")，而只能使用words.Split(','）