Generate Psuedo-Unique String

CSharp · Console

/Program.cs

using System;
using System.Text;
using System.Security.Cryptography;

public class Program
{
	public static void Main()
	{
		UseAHash();
		UseTime();
	}

	public static void UseAHash()
	{
		var primaryKey = 123345;
		HashAlgorithm algorithm = SHA1.Create();
		var hash = algorithm.ComputeHash(Encoding.UTF8.GetBytes(primaryKey.ToString()));
		StringBuilder sb = new StringBuilder();
		for (var i = 0; i < 6; ++i)
		{
			sb.Append(hash[i].ToString("X2"));
		}

		Console.WriteLine(sb);
	}

	public static void UseTime()
	{
		StringBuilder builder = new StringBuilder();
		
		// use universal to avoid daylight to standard time change.
		var now = DateTime.Now.ToUniversalTime();
		
		builder.Append(now.DayOfYear.ToString("D3"));
		builder.Append(now.Hour.ToString("D2"));
		builder.Append(now.Minute.ToString("D2"));
		builder.Append(now.Second.ToString("D2"));
		builder.Append(now.Millisecond.ToString("D3"));
		
		Console.WriteLine("Length: " + builder.Length);
		Console.WriteLine("Result: " + builder);
	}
}