String extension makes you no longer suffer from single-and double-byte problems in PadLeft and PadRight.

String extension makes you no longer suffer from single-and double-byte problems in PadLeft and PadRight.

In NET, the Length of a string does not distinguish whether the character contained in the current string is a single or dubyte character, as a result, when we use the PadLeft and PadRight methods of strings to process some strings that require typographical display, the related display will be uneven, so here we have such an extension, let the double byte display occupy two single byte width "vomit", the following is the specific code

 

Using System. Text. RegularExpressions; public static class StringExtensions {////// Fill the length to the left by a single-byte string ///////////////
 Public static string PadLeftWhileDouble (this string input, int length, char paddingChar = '\ 0') {var singleLength = GetSingleLength (input); return input. padLeft (length-singleLength + input. length, paddingChar);} private static int GetSingleLength (string input) {if (string. isNullOrEmpty (input) {throw new ArgumentNullException ();} return Regex. replace (input, @ "[^ \ x00-\ xff]", "aa "). length; // calculate the Length of a single-byte string }////// Fill the length to the right based on a single-byte string ///////////////
 Public static string PadRightWhileDouble (this string input, int length, char paddingChar = '\ 0') {var singleLength = GetSingleLength (input); return input. padRight (length-singleLength + input. length, paddingChar );}}

The test code is as follows:

 

 

Console. writeLine ("123 test ". padRightWhileDouble (25) + "1"); Console. writeLine ("123 test ". padRightWhileDouble (25, 'A') + "1"); Console. writeLine ("1231212 ". padRightWhileDouble (25) + "1"); Console. writeLine ("1231212 ". padRightWhileDouble (25, 'A') + "1"); Console. writeLine ("123 test ". padLeftWhileDouble (25) + "1"); Console. writeLine ("123 test ". padLeftWhileDouble (25, 'A') + "1"); Console. writeLine ("1231212 ". padLeftWhileDouble (25) + "1"); Console. writeLine ("1231212 ". padLeftWhileDouble (25, 'A') + "1 ");

Test