How can i read multiple files and show reading progress of every files one by one into dataGridView?

Question

I have created two columns. first column is filename and second column is progress. I want to show reading progress of every files into second column (progress) one by one.

                    string path = "C:/Users/Nitesh/Documents/New folder (2)";

        DirectoryInfo dir = new DirectoryInfo(path);
        foreach (var file in dir.GetFiles())
        {
            FileStream fs = File.Open(path, FileMode.Open, FileAccess.ReadWrite);
            long filesize = fs.Length;
            byte[] data = new byte[fs.Length];
            int offset = 0;

            while (filesize > 0)
            {
                int read = fs.Read(data, offset, (int)filesize);
                filesize -= read;
                offset += read;
                int pro = read * 100 / (int)file.Length;

                //dataGridView1.Rows.Add(new object[] { file.Name,  file.Length, pro});
            }
        }

Answer 1

Hi, try following demo:

XAML:

<Window x:Class="WpfApp1.Window20"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:WpfApp20"
        mc:Ignorable="d"
        Title="Window20" Height="450" Width="800">
  <Window.DataContext>
    <local:ViewModel/>
  </Window.DataContext>
    <Grid>
    <DataGrid ItemsSource="{Binding View}"/>
  </Grid>
</Window>

And ViewModel:

using System;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.IO;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Data;

namespace WpfApp20
{
  public class ViewModel
  {
    public ViewModel()
    {
      cvs.Source = col;
      Task.Factory.StartNew(new Action(loadInfo));
    }
    public ICollectionView View { get => cvs.View; }

    CollectionViewSource cvs = new CollectionViewSource();
    ObservableCollection<Data> col = new ObservableCollection<Data>();

    void loadInfo()
    {
      string dirPath = @"C:/temp";
      DirectoryInfo dir = new DirectoryInfo(dirPath);
      foreach (var file in dir.GetFiles())
      {
        try
        {
          FileStream fs = File.Open(file.FullName, FileMode.Open, FileAccess.ReadWrite);
          long filesize = fs.Length;
          byte[] data = new byte[fs.Length];
          int offset = 0;
          while (filesize > 0)
          {
            int read = fs.Read(data, offset, (int)filesize);
            filesize -= read;
            offset += read;
            int pro = read * 100 / (int)file.Length;
            Application.Current.Dispatcher.Invoke(() =>
              col.Add(new Data() { Name = file.Name, Length = file.Length, Pro = pro }));
          }
        }
        catch { }
      }
    }
  }

  public class Data
  {
    public string Name { get; set; }
    public long Length { get; set; }
    public int Pro { get; set; }
  }
}