using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"Retails_OB_(?<YYYY>\d{4})(?<MM>\d{2})(?<DD>\d{2}).csv";
string input = @"Retails OB.csv
Retails_OB_20200717.csv
Retails_OB_20200723.csv
Retails_OB_20200804.csv
Retails_OB_20200814.csv
Retails_OB_20200821.csv
Retails_OB_20200825.csv
Retails_OB_20200902.csv
Retails_OB_20200910.csv
Retails_OB_20200917.csv
Retails_OB_20200924.csv
Retails_OB_20200929.csv
Retails_OB_20201006.csv
Retails_OB_20201013.csv
Retails_OB_20201021.csv
Retails_OB_20201028.csv
Retails_OB_20201119.csv
Retails_OB_20201125.csv
Retails_OB_20201214.csv
";
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