System.Text.RegularExpressions

Validate numbers

If Possible, Don't Use Regex To Validate Numbers. If at all possible, use your language. There may be functions to help you determine if the value contained by a string is a valid number. That being said, if you're accepting a variety of formats (commas, etc.) you may not have a choice.

Tags: #digits, #numbers, #parsing, #real number, #validate, #validating. Views: 4000. stackoverflow, 7/12/2015
Link 1: http://www.systemtextregularexpressions.com/m13/validate-numbers
Link 2: http://www.systemtextregularexpressions.com/m13 (short)

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//.NET Regex.Match Online Tester: www.systemtextregularexpressions.com

//Namespace
using System.Text.RegularExpressions;

//Regex Pattern
string pattern = @"^([0]|\d{1,2})(?:,\d{1,2})?$";

//Regex example #1
Regex r = new Regex(@"^([0]|\d{1,2})(?:,\d{1,2})?$", RegexOptions.Multiline);
Match m1 = r.Match("input text");
MatchCollection mc1 = r.Matches("input text");

//Regex example #2
Match m2 = Regex.Match("input text", @"^([0]|\d{1,2})(?:,\d{1,2})?$", RegexOptions.Multiline);
MatchCollection mc2 = Regex.Matches("input text", @"^([0]|\d{1,2})(?:,\d{1,2})?$", RegexOptions.Multiline);

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'.NET Regex.Match Online Tester: www.systemtextregularexpressions.com

'Namespace
Imports System.Text.RegularExpressions

'Regex Pattern
Dim pattern As String = "^([0]|\d{1,2})(?:,\d{1,2})?$"

'Regex example #1
Dim r As Regex = New Regex("^([0]|\d{1,2})(?:,\d{1,2})?$", RegexOptions.Multiline)
Dim m1 As Match = r.Match("input text")
Dim mc As MatchCollection = r.Matches("input text")

'Regex example #2
Dim m2 As Match = Regex.Match("input text", "^([0]|\d{1,2})(?:,\d{1,2})?$", RegexOptions.Multiline)
Dim mc2 As MatchCollection = Regex.Matches("input text", "^([0]|\d{1,2})(?:,\d{1,2})?$", RegexOptions.Multiline)

System.Text.RegularExpressions .NET Regex.Match

Validate numbers

IsMatch=true

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