Web6 Answers Sorted by: 58 You do any of the following: Use regular expressions. You can use a regular expression with either A negative character class that defines the characters that are what you don't want (those characters other than decimal digits): private static readonly Regex rxNonDigits = new Regex ( @" [^\d]+"); WebThen, you don't need the + in there since all you need is to guarantee 1 non-digit is in there (more might be in there as covered by the .* on the ends). \b.* [^0-9].*\b Next, you can do away with the \b on either end since these are unnecessary constraints (invoking reference to alphanum and _). .* [^0-9].*

Check if string have uppercase, lowercase and number

WebApr 13, 2024 · To check if a string contains a number, we can use the regular expression pattern \d+, which matches one or more digits. Here's an example program: import re def … WebOct 7, 2024 · In C# I need to check if a variable of type string consists of either number, comma, space or minus sign "-" For example The following strings are valid 67342-23 … ion exchange purolite

How do I verify that a text box contains only numbers in Delphi?

WebApr 13, 2024 · To check if a string contains a number, we can use the regular expression pattern \d+, which matches one or more digits. Here's an example program: import re def check_string_for_number (string): pattern = r"\d+" match = re.search (pattern, string) if match: return True else: return False # Test the function string1 = "Hello world!" Webopen System open System.Runtime.CompilerServices [] type StringExtensions = [] static member Contains(str: string, substring, comp: StringComparison) … WebOct 18, 2024 · You can match a 4 digits string and parse it. var resultString = int.Parse ( Regex.Match (zip, @"\d {4}").Value ); If you want the Linq equivalent var linqEquiv = zip.Select ( (c, i) => String.Join ("",zip.Skip (i).Take (4))).FirstOrDefault (zip => { int i; return int.TryParse (zip, out i) && i >= 1000 && i <= 2000 ; }); ontario ministry of health billing