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  • 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>");
    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)
    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
    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)
    程序代码
    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(',')
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  • 原文地址:https://www.cnblogs.com/yewei798/p/2230216.html
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