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C#中split的5种方法

2009-03-16 18:05 295 查看
C#中split的5种方法
第一种方法：

string s=abcdeabcdeabcde;

string[] sArray=s.Split('c') ;

foreach(string i in sArray)

Console.WriteLine(i.ToString());

输出下面的结果:

ab

deab

deab

de

第二种方法：

我们看到了结果是以一个指定的字符进行的分割。使用另一种构造方法对多个字符进行分割:

string s="abcdeabcdeabcde";

string[] sArray1=s.Split(new char[3]{'c','d','e'}) ;

foreach(string i in sArray1)

Console.WriteLine(i.ToString());

可以输出下面的结果：

ab

ab

ab

第三种方法：

除了以上的这两种方法以外,第三种方法是使用正则表达式。新建一个控制台项目。然后先添加 using System.Text.RegularExpressions;

System.Text.RegularExpressions

string content=agcsmallmacsmallgggsmallytx;

string[]resultString=Regex.Split(content,small,RegexOptions.IgnoreCase)

foreach(string i in resultString)

Console.WriteLine(i.ToString());

输出下面的结果:

agc

mac

ggg

ytx

第四种方法：

string str1=我*****是*****一*****个*****教*****师;

string[] str2;

str1=str1.Replace(*****,*) ;

str2=str1.Split(*) ;

foreach(string i in str2)

Console.WriteLine(i.ToString());

第五种方法：

string str1=我**是*****一*****个*****教*****师;

我希望显示的结果为:我是一个教师。

我如果采用上面的第四种方法来做就会产生下面的错误：我 是一个教师。中间有空格输出，所以输出结果并不是希望的结果，这就又回到了正则表达式了，这时可以采用下面的第五种方法：

string str1=我**是*****一*****个*****教*****师;

string[] str2 = System.Text.RegularExpressions.Regex.Split(str1,@[*]+);

foreach(string i in str2)

Console.WriteLine(i.ToString());

这里通过[*]+ 巧妙的完成了我们的目标。

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