CODEWITHSUNDEEP
c#system.io.filesystem.io.directory
ManInMoon
ManInMoon

Reputation: 7005

Why is copy to specific folder much slower?

I have an odd issue copying files from one folder to another on the same drive.

If I copy to a particular folder PROBLEM_FOLDER the copying takes a very long time.

If I copy to another folder which I created as a test OK_FOLDER the copying is very fast.

I first noticed the problem after I accidentally completely filled my C DRIVE and had to remove a huge number of files from PROBLEM_FOLDER.

What could be the issue here?

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.Diagnostics;

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

        private void button1_Click(object sender, EventArgs e)
        {

           MoveFiles(@"C:\HOTDATA\DB\TEST", @"C:\PROBLEM_FOLDER\DB");
           //MoveFiles(@"C:\HOTDATA\DB\TEST", @"C:\OK_FOLDER\DB");
        }

        public void MoveFiles(string sourceDir, string targetDir)
        {
            foreach(var file in Directory.GetFiles(sourceDir,"nEq*-1m*"))
            {

                string FileName = Path.GetFileName(file);

                var targetPath = Path.Combine(targetDir, FileName);
                if (File.Exists(targetPath))
                {
                    //File.Delete(targetPath);
                }
                else
                {
                    File.Move(file, targetPath);
                }
            }
        }

    }
}

Upvotes: 1

Views: 222

Answers (1)

tim
tim

Reputation: 114

You might have hidden system files in that folder. Change your view settings to show hidden and untick the hide protected system files. In the old days c# was notoriously slow iterating folders and you have to do things a certain way to work with large folders. This was years ago though, so I don't know if it is still the case.

Upvotes: 1

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