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c中split的用法

時間: 長思709 分享

c中split的用法

  c中split的用法你知道嗎?下面小編就跟你們詳細介紹下c中split的用法,希望對你們有用。

  c中split的用法如下:

  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(shù)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(shù):

  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么使用(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(shù)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(',')

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