How to split strings in C #

How to split strings in C #

Method 1: Open vs.net to create a console project. Then input the followingProgram. String S = "abcdeabcdeabcde "; String [] sarray = S. Split (''c ''); Foreach (string I in sarray) Console. writeline (I. tostring ()); Output the following result: AB Deab Deab De We can see that the result is separated by a specified character. What if we want to use multiple characters for segmentation, such as C, D, and E? Well, we use another constructor: Change to string S = "abcdeabcdeabcde String [] sarray1 = S. Split (New char [3] {'C', ''d', ''e ''}); Foreach (string I in sarray1) Console. writeline (I. tostring ()); The following result can be output: AB AB AB In addition to the above two methods,   The third method is to use a regular expression. Create a console project. Then add using system. Text. regularexpressions; 'Http: // www.knowsky.com Main (): change 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

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Note for splitting strings using the string. split method in C:

 

Note for splitting strings using the string. split method in C: String. Split provides us with a very flexible way to use it. However, improper use may cause errors. Most people recently used it in code review: String S = "A | B |: | C: D "; String [] Ss = S. Split ("|: |". tochararray ()); // Ss [0]: // Ss [1]: B // Ss [2]: // Ss [3]: // Ss [4]: c // Ss [5]: d In fact, his intention is to use "|: |" to separate the string, the goal is to get the array: "A | B" and "C: D ", however, the overload of Split (string) is not directly found, and tochararray () is used. Obviously, the result is incorrect. Correct usage: String [] SS1 = S. Split (new [] {"|: |"}, stringsplitoptions. None ); // SS1 [0]: A | B // SS1 [1]: C: d The next parameter indicates whether to automatically remove empty data. for example, "A | B |: | C: d |: |" When splitting, three arrays are returned. The last element of the array is null "", if you want to filter out these empty elements, you can use the parameter stringsplitoptions. removeemptyentries: String [] SS1 = S. split (new [] {"|: |"}, stringsplitoptions. removeemptyentries ); Example: S = "A | B |: | C: d |: | "; String [] SS1 = S. Split (new [] {"|: |"}, stringsplitoptions. removeemptyentries ); // SS1 [0]: "A | B" // SS1 [1]: "C: D" SS1 = S. Split (new [] {"|: |"}, stringsplitoptions. None ); // SS1 [0]: "A | B" // SS1 [1]: "C: D" // SS1 [2]: ""

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Reprinted statement:This article from http://luchuxiang.blog.163.com/blog/static/1901506020093610134396/

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