using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"^(?<Number>[0-9]{9}\.?(?:[0-9]{2})?)$";
string input = @"I am trying to make a textbox in UWP only allow the following input: 9 digits, followed by a '.' (optional), followed by 2 digits (optional), by using Regex.
So far i have come up with an expression that allows 9 digits, or 9 digits and a '.'
string pattern = @""^(?<Number>([0-9]{0,9})(\.?)([0-9]{0,2}?))"";
I want it to accept
123456789
or
123456789.12
as inputs.
But now it only accepts
123456789
or
123456789.";
RegexOptions options = RegexOptions.Multiline;
foreach (Match m in Regex.Matches(input, pattern, options))
{
Console.WriteLine("'{0}' found at index {1}.", m.Value, m.Index);
}
}
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for C#, please visit: https://msdn.microsoft.com/en-us/library/system.text.regularexpressions.regex(v=vs.110).aspx