WebJul 3, 2024 · // Code to check string has special characters or not string str = "rake *s@hr:d"; Console. WriteLine ( "I/P:-" + str ); Regex rgx = new Regex ( "[^A-Za-z0-9]" ); bool hasSpecialChars = rgx. IsMatch ( str ); Console. WriteLine ( "Has string special character (s) : " + hasSpecialChars ); Console. ReadLine (); } } WebJan 3, 2024 · Get the string. Create a regular expression to check string is alphanumeric or not as mentioned below: regex = "^ (?=.* [a-zA-Z]) (?=.* [0-9]) [A-Za-z0-9]+$"; Where: ^ represents the starting of the string (?=.* [a-zA-Z]) represents the alphabets from a-z, A-Z (?=.* [0-9]) represents any number from 0-9
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WebJun 23, 2024 · Use the substring () method in C# to check each and every substring for unique characters. Loop it until the length of the string. If any one the substring matches another, then it would mean that the string do not have unique characters. You can try to run the following code to determine if a string has all unique characters. Example Live … WebJun 21, 2016 · One way would be this: using the class System.Text.ASCIIEncoding, serialize your string as ASCII, and then deserialize it back to string. After this round trip, you will have two strings, "before" and "after". They are both "Unicode", but in new string some characters will turn two '?'. horn neighbor
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WebStrings - Special Characters Because strings must be written within quotes, C# will misunderstand this string, and generate an error: string txt = "We are the so-called "Vikings" from the north."; The solution to avoid this … WebMar 26, 2010 · private bool ContainsSpecialChars (string value) { var list = new [] {"~", "`", "!", "@", "#", "$", "%", "^", "&", "*", " (", ")", "+", "=", "\""}; return list.Any (value.Contains); } Share Improve this answer Follow answered Jun 30, 2015 at 2:07 Filix Mogilevsky 717 7 … WebJun 23, 2024 · Use the substring () method in C# to check each and every substring for unique characters. Loop it until the length of the string. If any one the substring … hornmugg