I have the following filename:
SCO_InsBooking_1.pdf
SCO_InsBooking_10.pdf
SCO_InsBooking_100.pdf
SCO_InsBooking_1000.pdf
I an reading the file name using FileInfo and want to split it so I only get the 1, 10, 100 or 1000 number how would I achive this?
Using regular expressions:
string number = Regex.Match("SCO_InsBooking_1000.pdf", @"\d+").Value; Assuming that no other number is present in the file name.
filename = filename.Substring(filename.lastIndexOf("_")+1); filename = filename.Substring(0, filename.indexOf(".")); Alternatively
filename = Regex.Replace(filename, "_(\d+).pdf$", "$1"); 
string number = "SCO_InsBooking_1.pdf".split('_')[2].split('.')[0]; Of course, it would be better with some bounds checking to avoid index exceptions.
You can do this with a regular expression:
Regex.Match(filename, @".*_(\d+).pdf").Groups[1].Value You could use string.replace()
using System.Collections.Generic; namespace strings1 { class Program { static void Main(string[] args) { List<string> names = new List<string> { "SCO_InsBooking_1.pdf", "SCO_InsBooking_10.pdf", "SCO_InsBooking_100.pdf", "SCO_InsBooking_1000.pdf" }; List<string> numbers = new List<string>(); foreach (string item in names) { numbers.Add(item.Replace("SCO_InsBooking_", string.Empty).Replace(".pdf",string.Empty)); } } } } 