Several ways to split strings in C #

The string has recently seen many posts in the Forum asked how to use split to split the string, I do some simple summary of split, hope to be helpful to everyone. Here are a few ways to:

The first method: Open vs.net to create a new console item. Then enter the following program under the main () method.



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 see that the result is a split with a specified character. If we want to use more than one character for segmentation like C,d,e how? OK, let's use another construction method:



Change to String 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 these two methods, the third approach is to use regular expressions. Create a new console item. Then add the using System.Text.RegularExpressions first;

Main (): Change 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 results: AGC
Mac
Ggg
Ytx
What's the benefit of using regular expressions? Don't worry, we'll see its uniqueness in the back.
The 4th method is described below. Like what

String str1= "I am * * * * * * * * * * * * * * * * * * * * *;

If I want to show as: I am a teacher, how to do it? We can use the following code:





String str1= "I am * * * * * * * * * * * * * * * * TEACHERS;

String[] str2;

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

Str2=str1. Split (' * ');

foreach (String i in str2)

Console.WriteLine (i.ToString ());





This can also get the correct results. But like

String Str1= "I * * * * * * * * * * is a * * * * * * * * * *;

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

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

There is a space output in the middle, so the output is not the result I hope, how to solve it? This goes back to the regular expression (see how powerful it is), and you can use the fifth method below:



String Str1= "I * * * * * * * * * * is a * * * * * * * * * *;

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

foreach (String i in str2)

Console.WriteLine (i.ToString ());