VersionNumber

CSharp · Console

/Program.cs

using System;
using System.Linq;
using System.Collections.Generic;
					
public class Program
{
	public static void Main()
	{
		string[] versionStrings = new [] {"3.5.25569", "2.5.25557", "2.5.25580", "2.5.25569", "2.4.25569"};
		IEnumerable<VersionNumber> versions = versionStrings.Select(s => VersionNumber.Parse(s));
		IOrderedEnumerable<VersionNumber> sorted = versions.OrderBy(v => v);
		
		foreach (var res in sorted) {
		    Console.WriteLine(res);	
		}
	}
}


public class VersionNumber : IComparable {

    public int Major    { get; set; }
    public int Minor    { get; set; }
    public int Revision { get; set; }

    // Converts string to VersionNumber object
    public static VersionNumber Parse(string s) {
        if (string.IsNullOrWhiteSpace(s)) {
            throw new ArgumentNullException();
        }
		
		var result = new VersionNumber();

        var parts = s.Split(new [] {'.'});
        if (parts.Count() != 3) {
            throw new ArgumentException("Input string must be in format 'X.Y.ZZZZZ'.");
        }

        try {
            result.Major = int.Parse(parts[0]);
            result.Minor = int.Parse(parts[1]);
            result.Revision = int.Parse(parts[2]);
        }
        catch (FormatException) {
            throw new ArgumentException("Input string must be in format 'X.Y.ZZZZZ', with X, Y, Z integers.");
        }
		return result;
    }

    // Compares two VersionNumbers
    public int CompareTo(object obj) {
        if (obj == null) return 1;

        VersionNumber otherVersion = obj as VersionNumber;
        if (otherVersion == null) {
            throw new ArgumentException("Object is not a VersionNumber");
        }

        // start comparison with Major Version, then Minor, then Revision
        var result = Major.CompareTo(otherVersion.Major);
        if (result == 0) {
            result = Minor.CompareTo(otherVersion.Minor);
        }
        if (result == 0) {
            result = Revision.CompareTo(otherVersion.Revision);
        }
        return result;
    }
	
	public override string ToString() {
		return Major + "." + Minor + "." + Revision;
	}
}