Salut les amis, 

j'ai un code qui importer plusieurs fichiers txt vers un datagridview, j'aimerais à ce que l'operation se fasse avec une bar de progression qui va indiquer à l'utilisateur l'evolution de l'opération, si quelqu'un à une solution qui peut m'aider

voici le code :

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Data;
using System.IO;
 
namespace WindowsFormsApp1
{
    class Helper
    {
        public static string file;
      
 
        public static void AddTextFileContentToDataTable(string finename, DataTable dt, char delimiter)
        {
            string[] lines = File.ReadAllLines(finename);
            if (dt.Columns.Count == 0)
            {
                AddCoulumnToTable(lines, delimiter, ref dt);
            }
            AddRowToTable(lines, delimiter, ref dt);
        }
 
      
 
        private static void AddRowToTable(string[] Values, char delimiter, ref DataTable dt)
        {
            for (int i = 2; i < Values.Length; i++)
            {
                string[] valeurs = Values[i].Split(delimiter);
                DataRow dr = dt.NewRow();
                for (int j = 0; j < valeurs.Length; j++)
                {
                    dr[j] = valeurs[j];
                }
                dt.Rows.Add(dr);
            }
        }
 
 
 
        private static void AddCoulumnToTable(string[] columnCollectioi, char delimiter, ref DataTable dt)
        {
            string[] colones = columnCollectioi[0].Split(delimiter);
            foreach (string columnName in colones)
            {
                DataColumn dc = new DataColumn();
                dt.Columns.Add(dc);
            }
        }
    }
}

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.IO;
 
namespace WindowsFormsApp1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        
 
        private void Form1_Load(object sender, EventArgs e)
        {
 
            dataGridView1.DataSource = new DataTable();
        }
 
        private void  btn_import_Click(object sender, EventArgs e)
        {
            OpenFileDialog openFileDialog1 = new OpenFileDialog
            {
                Title = "Parcourir le fichier",
                CheckFileExists = true,
                CheckPathExists = true,
                DefaultExt = "txt",
                Filter = "txt files (*.txt)|*.txt",
                FilterIndex = 2,
                Multiselect = true,
                RestoreDirectory = true,
                ReadOnlyChecked = true,
                ShowReadOnly = true,
            };
            char c = '\t';
            
 
            if (openFileDialog1.ShowDialog() == DialogResult.OK)
            {
                foreach (string file in openFileDialog1.FileNames)
                {
                    textBox1.Text = file;
                    Helper.file = file;
                    Helper.AddTextFileContentToDataTable(textBox1.Text, (DataTable)dataGridView1.DataSource, c);
 
 
                }
                // dataGridView1.DataSource = Helper.DataTableFromTextFile(textBox1.Text);
 
               // Helper.AddTextFileContentToDataTable(textBox1.Text, (DataTable)dataGridView1.DataSource, c);
 
 
 
            }
 
        }
        
        private void label1_Click(object sender, EventArgs e)
        {
 
        }
 
    }
}

Merci d'avance pour vos intervention!!!!

Que reprochez-vous à l'exemple de la ProgressBar dans la documentation M$ ?

https://docs.microsoft.com/fr-fr/dotnet/api/system.windows.forms.progressbar?view=net-5.0