c# copy todestination and continue rename

the code be low if i want to copy from source folder to destination folder  3 time (I want to play mp3 files in a loop)

  may be i need to run

    CopyFiles(sorrceTextbox.Text, destTextbox.Text
 
   but how can i  continue number of file name in destination directory
   suppose  when it copy finish in the first time it finish with 10051 then next it continue  to 10061

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            FolderBrowserDialog dlg = new FolderBrowserDialog();
            if (dlg.ShowDialog() == DialogResult.OK)
            {
                sorrceTextbox.Text = dlg.SelectedPath;
            }


        }


        private void textBox1_TextChanged(object sender, EventArgs e)
        {

        }

        private void button2_Click(object sender, EventArgs e)
        {
            FolderBrowserDialog dlg2 = new FolderBrowserDialog();
            if (dlg2.ShowDialog() == DialogResult.OK)
            {
                destTextbox.Text = dlg2.SelectedPath;
            }

        }

        private void textBox2_TextChanged(object sender, EventArgs e)
        {

        }

        private void startcopy_Click(object sender, EventArgs e)
        {

            
            if (String.IsNullOrEmpty(sorrceTextbox.Text) || String.IsNullOrEmpty(destTextbox.Text))
            {
                this.labelStart.Text = "Hello World";
            }
            else
            {
                int fileCount = Directory.GetFiles(destTextbox.Text).Length;
                this.labelStart.Text = fileCount.ToString() ;

                CopyFiles(sorrceTextbox.Text, destTextbox.Text);




            }



        }


        private void label1_Click(object sender, EventArgs e)
        {
            
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }
        
        public void CopyFiles(string sourceDir, string targetDir)
        {
            string[] sourceFiles = Directory.GetFiles(sourceDir);
            for (int i = 0; i < sourceFiles.Length; i++)
            {
                string sourceFile = sourceFiles[i];
                string targetFile = targetDir + "\\" + "1" + (i + 10).ToString().PadLeft(3, '0') + "1" + ".mp3";
                File.Copy(sourceFile, targetFile, true);
            }
        }


    }
}

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teeraAsked:
Who is Participating?
 
PryratesCommented:
maybe this might help
public void CopyFiles(string sourceDir, string targetDir)
        {
            string[] sourceFiles = Directory.GetFiles(sourceDir);
            for (int i = 0; i < sourceFiles.Length; i++)
            {
                string sourceFile = sourceFiles[i];
                string targetFile = FreeFileNamePattern(targetDir);                
                File.Copy(sourceFile, targetFile, true);
            }
}


        private string FreeFileNamePattern(string source)
        {
            string fileName = Path.Combine(source, "10011.mp3");

            int i = 2;
            while (File.Exists(fileName))
            {
                fileName = Path.Combine(source, string.Concat("1", i.ToString("000"),"1.mp3"));
                i++;
            }
            return fileName;
        }

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0
 
PryratesCommented:
you can only archive that goal if you have strict naming conventions for your destination files.
You need to isolate a naming - pattern. Therefore you need to analyse the files already stored in the destination directory to find the last file that has been copied to the directory.
How are your files named in your destination directory? Is it random or are those files following a naming convention as well?
F.e. are ONLY the copied files start with "1" ?
0
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