C# Split用法

C#中Split用法~

 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>");

輸出結果：

aaa

bbb

ccc

2、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

3、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");

這是一個具有語法錯誤的語句，Split 的 separator 參數應該是 char[] 或 string[]，不應是字符串。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)

下邊我們通過一些實例來說明下怎麼使用(以下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

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