Regular Expressions

Scenario:

Various regular expression scenarios

Solution:

• Hex Character
  var rex = new Regex("[0-9,A-F,a-f]{2}");
  Line Breaks 
  var rex = new Regex(@"[\r\n\t]");

• File name "${RND:###}-${TS:yyyyMMdd}.${RND:#}.csv";

var fileFormat = new Regex(@"\${(?<type>(RANDOM|TIMESTAMP)):(?<format>[^}]+)}",
            RegexOptions.Compiled | RegexOptions.CultureInvariant | RegexOptions.IgnoreCase);

• Replace

var regex = new Regex(@"""(\d+\.\d)""", RegexOptions.Compiled);

response = regex.Replace(response, @"""percent$1""");

• "fieldName[]"

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using System.Text.RegularExpressions;

namespace Web.Models
{
    public class Class
    {
        public bool Validate()
        {
            var value = "fieldName[]";
            var regex = new Regex(@"^fieldName\[.*?\]$",
                   RegexOptions.Compiled | RegexOptions.IgnoreCase | RegexOptions.CultureInvariant);

            if (regex.IsMatch(value))
            {
                return true;
            }
            return false;
        }
    }
}