using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"^((([1-9]\d{0,2}(,\d{3})*)(\.\d{1,4})?)|[1-9]\d*|(0\.\d{1,4})|0)$";
string input = @"2,000,000
200000.0000
200
200.00000
2,000.00
2,0,00.00
1,234,456.7890
0090
0333333333333.33
3
3.33
.33
0.88
1,000,000
1000,000
1,000000
1000000
0";
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