C # split and other methods to split strings

Split separator strings are commonly used. I just showed this on the internet and found that it is not bad. I haven't updated my blog for a long time. I have borrowed it for sending and sending. Maybe I can forget it later.

I have recently seen many posts in the forum asking me how to use them.SplitTo split the string.SplitMake some simple summary and hope to help you. The following describes several methods:

Method 1: OpenVs.netCreate a console project. ThenMain ()Enter the followingProgram.

 

 String S = "abcdeabcdeabcde ";

String [] sarray = S. Split ('C ');

Foreach (string I in sarray)

Console. writeline (I. tostring ());

 

Output the following results: AB

Deab

Deab

De

 

We can see that the result is separated by a specified character. If we want to use multiple characters for segmentation, as shown in figureC, D, EWhat should we do? Well, we use another constructor.:

 

ChangeString S = "abcdeabcdeabcde

String [] sarray1 = S. Split (New char [3] {'C', 'D', 'E '});

Foreach (string I in sarray1)

Console. writeline (I. tostring ());

 

You can output the following results:AB

AB

AB

 

 In addition to the above two methods,The third method is to use a regular expression. Create a console project. Then addUsing system. Text. regularexpressions;

Main ():To

 

System. Text. regularexpressions

String content = "agcsmallmacsmallgggsmallytx ";

 
String [] resultstring = RegEx. Split (content, "small", regexoptions. ignorecase)
 

 
Foreach (string I in resultstring)
 

Console. writeline (I. tostring ());
 

 
Output the following result: AGC
 

 
Mac
 

 
Ggg
 

Ytx
 

 
UseWhat are the advantages of regular expressions? Don't worry, we will see its uniqueness later.
 

The following describes 4th methods. For example

String str1 = "My ***** is ************************ Teacher ";

If I want to show that I am a teacher, what should I do? We can use the followingCode:

 

 

String str1 = "My ***** is ********************** teacher;

String [] str2;

Str1 = str1.replace ("*****","*");

Str2 = str1.split ('*');

Foreach (string I in str2)

Console. writeline (I. tostring ());

 

 

In this way, you can get the correct result. However, for example

String str1 = "I'm *** A ********************* Teacher ";

The result I want to display is: I am a teacher.

If I use the fourth method above, the following error will occur: I am a teacher.

There are spaces in the middle of the output, so the output result is not what I want. How can this problem be solved? This will returnRegular Expression (here we can see its power)In this case, the fifth method can be used:

 

String str1 = "I'm *** A ********************* Teacher ";

String [] str2 = system. Text. regularexpressions. RegEx. Split (str1, @ "[*] + ");

Foreach (string I in str2)

Console. writeline (I. tostring ());

 

Here, we use "[*] +" to cleverly accomplish our goal.