Question

How to get the size of a folder include all files in all subfolders using WinForms with C#

Answer 1

namespace WinFormsApp1
{
    public partial class Form1 : Form
    {
        static long folderSize(DirectoryInfo folder)
        {
            long totalSizeOfDir = 0;

            FileInfo[] allFiles = folder.GetFiles();

            foreach (FileInfo file in allFiles)
            {
                totalSizeOfDir += file.Length;
            }

            DirectoryInfo[] subFolders = folder.GetDirectories();

            foreach (DirectoryInfo dir in subFolders)
            {
                totalSizeOfDir += folderSize(dir); // recursively calling to get all the subfolders
            }
            
            return totalSizeOfDir;
        }

    public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            DirectoryInfo folder = new DirectoryInfo("c://test");

            long totalFolderSize = folderSize(folder);

            MessageBox.Show(totalFolderSize.ToString() + " bytes");
        }
    }
}




/*
run:
  
54746 bytes
 
*/

 

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