Hidistro.UI.Web/PathFormatter.cs

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using System;
using System.IO;
using System.Text.RegularExpressions;

public static class PathFormatter
{
    public static string Format(string originFileName, string pathFormat)
    {
        if (string.IsNullOrWhiteSpace(pathFormat))
        {
            pathFormat = "{filename}{rand:6}";
        }
        originFileName = new Regex(@"[\\\/\:\*\?\042\<\>\|]").Replace(originFileName, "");
        string extension = Path.GetExtension(originFileName);
        string fileNameWithoutExtension = Path.GetFileNameWithoutExtension(originFileName);
        pathFormat = pathFormat.Replace("{filename}", fileNameWithoutExtension);
        pathFormat = new Regex(@"\{rand(\:?)(\d+)\}", RegexOptions.Compiled).Replace(pathFormat, delegate (Match match) {
            int num = 6;
            if (match.Groups.Count > 2)
            {
                num = Convert.ToInt32(match.Groups[2].Value);
            }
            Random random = new Random();
            return random.Next((int) Math.Pow(10.0, (double) num), (int) Math.Pow(10.0, (double) (num + 1))).ToString();
        });
        pathFormat = pathFormat.Replace("{time}", DateTime.Now.Ticks.ToString());
        pathFormat = pathFormat.Replace("{yyyy}", DateTime.Now.Year.ToString());
        pathFormat = pathFormat.Replace("{yy}", (DateTime.Now.Year % 100).ToString("D2"));
        pathFormat = pathFormat.Replace("{mm}", DateTime.Now.Month.ToString("D2"));
        pathFormat = pathFormat.Replace("{dd}", DateTime.Now.Day.ToString("D2"));
        pathFormat = pathFormat.Replace("{hh}", DateTime.Now.Hour.ToString("D2"));
        pathFormat = pathFormat.Replace("{ii}", DateTime.Now.Minute.ToString("D2"));
        pathFormat = pathFormat.Replace("{ss}", DateTime.Now.Second.ToString("D2"));
        return (pathFormat + extension);
    }
}