how to show progress bar while save data into files in c#?

Question

I have a winform app. in this form I put a button.

this button open a file dialog user select multi files and then it convert all those files.I want to show progress bar after the user select the files.show percent and after all files finished then it stop the progressbar and make it 100%.

this is my btn convert code:

        private void btnConvert_Click(object sender, EventArgs e)
        {
            try
            {
                openFileDialog1.Filter = "Dwg Files(*.dwg)|*.dwg";
                if (openFileDialog1.ShowDialog(this) != DialogResult.OK) return;
                if (openFileDialog1.FileName != null)
                {
                    foreach (var file in openFileDialog1.FileNames)
                    {
                        CadDocument doc = DwgReader.Read(file);
                        doc.Header.Version = ACadVersion.AC1032;
                        string dxfPath = Path.Combine(Path.GetDirectoryName(file), Path.GetFileNameWithoutExtension(file) + ".dxf");
                        using (DxfWriter writer = new DxfWriter(dxfPath, doc, false))
                        {
                            writer.OnNotification += onNotification;
                            writer.Write();
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }

Answer 1

Hi @Farshad Valizade , Welcome to Microsoft Q&A,

1. Make sure the file dialog allows multiple file selections (openFileDialog1.Multiselect = true).
2. Get the list of files selected by the user and set the progress bar's maximum value to the number of files (progressBar1.Maximum = files.Length).
3. After each file is converted, increase the progress bar's value (progressBar1.Value++).
4. After all files have been processed, set the progress bar's value to the maximum value and display a completion message.

using System;
using System.IO;
using System.Windows.Forms;

namespace YourNamespace {
    public partial class YourForm: Form {
        public YourForm() {
            InitializeComponent();
        }

        private void btnConvert_Click(object sender, EventArgs e) {
            try {
                openFileDialog1.Filter = "Dwg Files(*.dwg)|*.dwg";
                openFileDialog1.Multiselect = true; // Ensure multiple selections are allowed
                if (openFileDialog1.ShowDialog(this) != DialogResult.OK) return;

                string[] files = openFileDialog1.FileNames;
                if (files.Length == 0) return;

                progressBar1.Minimum = 0;
                progressBar1.Maximum = files.Length;
                progressBar1.Value = 0;
                progressBar1.Visible = true;

                foreach(var file in files) {
                    CadDocument doc = DwgReader.Read(file);
                    doc.Header.Version = ACadVersion.AC1032;
                    string dxfPath = Path.Combine(Path.GetDirectoryName(file), Path.GetFileNameWithoutExtension(file) + ".dxf");
                    using(DxfWriter writer = new DxfWriter(dxfPath, doc, false)) {
                        writer.OnNotification += onNotification;
                        writer.Write();
                    }

                    // Update progress bar
                    progressBar1.Value++;
                }

                progressBar1.Value = progressBar1.Maximum;
                MessageBox.Show("All files converted! ");
            } catch (Exception ex) {
                MessageBox.Show(ex.Message);
            }
        }

        private void onNotification(object sender, NotificationEventArgs e) {
            // Handle notification events
        }
    }
}

Best Regards,

Jiale

---

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Answer 2

Hello friend, I hope you're having a nice day,

To show a progress bar while converting multiple files in your WinForms application, you can follow these steps:

1. Add a ProgressBar control to your form.
2. Set its Minimum and Maximum properties according to your progress range (typically 0 to 100).
3. Update the progress bar value inside your file conversion loop.
4. Handle the progress bar's visibility and value accordingly.

Here's an updated version of your btnConvert_Click method with the progress bar implementation:

private void btnConvert_Click(object sender, EventArgs e)
{
    try
    {
        openFileDialog1.Filter = "Dwg Files(*.dwg)|*.dwg";
        if (openFileDialog1.ShowDialog(this) != DialogResult.OK) return;
        
        progressBar1.Minimum = 0;
        progressBar1.Maximum = openFileDialog1.FileNames.Length;
        progressBar1.Value = 0;
        progressBar1.Visible = true;
        int progress = 0;
        foreach (var file in openFileDialog1.FileNames)
        {
            CadDocument doc = DwgReader.Read(file);
            doc.Header.Version = ACadVersion.AC1032;
            string dxfPath = Path.Combine(Path.GetDirectoryName(file), Path.GetFileNameWithoutExtension(file) + ".dxf");
            
            using (DxfWriter writer = new DxfWriter(dxfPath, doc, false))
            {
                writer.OnNotification += onNotification;
                writer.Write();
            }
            // Update progress bar
            progress++;
            progressBar1.Value = (int)((progress / (double)openFileDialog1.FileNames.Length) * 100);
        }
        // All files converted, hide progress bar and set value to 100%
        progressBar1.Visible = false;
        progressBar1.Value = 100;
    }
    catch (Exception ex)
    {
        MessageBox.Show(ex.Message);
    }
}

Make sure you have a ProgressBar named progressBar1 added to your form. This code will display the progress of file conversion as a percentage. Adjust the progress bar's appearance and behavior as needed for your application. I hope this helps. Have a nice day!!!