Burgo855 Burgo855 - 2 months ago 12
C# Question

Extract ZipFile Using C# With Progress Report

Can anyone tell me if it is possible(and give an example if it is) on how to have a progress bar(and status label if possible) showing the progress of a ZIP file being extracted using "ZipFile"(Ionic.zip, http://dotnetzip.codeplex.com/)?

My WinForm does a great job at extracting a ZIP file from my chosen path to a new path no worries at all using textboxes and browse buttons and all that jazz... However the only issue is i cannot use anything on my form during this time it is as if it has frozen, but its only because its unzipping the ZIP file in the background.

The ZIP file is a big file and i would like to make it less confusing on what is going on by adding and having a progress bar showing how the unzipping is going with a accurate ETA.

Surely this is possible, i just cannot work out how to do it in C# WinForms, i have had a fairly decent look all around the net without really being able to come across a example i can find suitable for me.

Here is a rough example of what i have:

private void button1_Click(object sender, EventArgs e)
{
var ROBOT0007 = textBox1.Text + @"\" + "ROBOT0007"; //ROBOT0007 folder
var ROBOT_INSTALL = textBox1.Text + @"\" + "911" + @"\" + "files"; //ROBOT0007/911/files
var ROBOT_INSTALL_SPECIAL = ROBOT_INSTALL + @"\" + "special.rar"; //ROBOT0007/911/files/special.rar

//If the path has text...
if (textBox1.TextLength > 0)
{
//if the subfolder doesn't exist then make it.
if (!Directory.Exists(ROBOT0007))
{
Directory.CreateDirectory(ROBOT0007);
}

//if the textbox directory exists
if (Directory.Exists(ROBOT0007))
{
using (ZipFile zip = ZipFile.Read(ROBOT_INSTALL_SPECIAL))
{
zip.ExtractAll(ROBOT0007, ExtractExistingFileAction.OverwriteSilently);

}
}
}
}


UPDATE(04/11/2014): I have removed the textbox for now gone back to simple basics, the following works with a background worker, however the cancel button has no effect on RAR files... any advice?

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Threading;
using System.Text;
using System.Windows.Forms;
using Ionic.Zip;
using System.IO;

namespace BackgroundWorkerSample
{
// The BackgroundWorker will be used to perform a long running action
// on a background thread. This allows the UI to be free for painting
// as well as other actions the user may want to perform. The background
// thread will use the ReportProgress event to update the ProgressBar
// on the UI thread.
public partial class Form1 : Form
{
/// <summary>
/// The backgroundworker object on which the time consuming operation
/// shall be executed
/// </summary>
BackgroundWorker backgroundWorker1;

public Form1()
{
InitializeComponent();
backgroundWorker1 = new BackgroundWorker();

// Create a background worker thread that ReportsProgress &
// SupportsCancellation
// Hook up the appropriate events.
backgroundWorker1.DoWork += new DoWorkEventHandler(backgroundWorker1_DoWork);
backgroundWorker1.ProgressChanged += new ProgressChangedEventHandler
(backgroundWorker1_ProgressChanged);
backgroundWorker1.RunWorkerCompleted += new RunWorkerCompletedEventHandler
(backgroundWorker1_RunWorkerCompleted);
backgroundWorker1.WorkerReportsProgress = true;
backgroundWorker1.WorkerSupportsCancellation = true;
}

/// <summary>
/// On completed do the appropriate task
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
void backgroundWorker1_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
// The background process is complete. We need to inspect
// our response to see if an error occurred, a cancel was
// requested or if we completed successfully.
if (e.Cancelled)
{
lblStatus.Text = "Task Cancelled.";
}

// Check to see if an error occurred in the background process.

else if (e.Error != null)
{
lblStatus.Text = "Error while performing background operation.";
}
else
{
// Everything completed normally.
lblStatus.Text = "Task Completed...";
}

//Change the status of the buttons on the UI accordingly
btnStart.Enabled = true;
btnCancel.Enabled = false;
}

/// <summary>
/// Notification is performed here to the progress bar
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e)
{

// This function fires on the UI thread so it's safe to edit

// the UI control directly, no funny business with Control.Invoke :)

// Update the progressBar with the integer supplied to us from the

// ReportProgress() function.

progressBar1.Value = e.ProgressPercentage;
lblStatus.Text = "Processing......" + progressBar1.Value.ToString() + "%";
}

/// <summary>
/// Time consuming operations go here </br>
/// i.e. Database operations,Reporting
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
{
// The sender is the BackgroundWorker object we need it to
// report progress and check for cancellation.
//NOTE : Never play with the UI thread here...
for (int i = 0; i < 100; i++)
{
//Thread.Sleep(100);
string INSTALL_FOLDER= "C:" + @"\" + "Program Files (x86)" + @"\" + "Robot91111"+ @"\" + "basic" + @"\" + "string" + @"\" + "special.rar";
string BURGOS_FOLDER = "C:" + @"\" + "Program Files (x86)" + @"\" + "Robot91111" + @"\" + "Burgos_Folder";
if (!Directory.Exists(BURGOS_FOLDER))
{
Directory.CreateDirectory(BURGOS_FOLDER);
using (ZipFile zip = ZipFile.Read(INSTALL_FOLDER))
{
zip.ExtractAll(BURGOS_FOLDER, ExtractExistingFileAction.OverwriteSilently);
}
}

// Periodically report progress to the main thread so that it can
// update the UI. In most cases you'll just need to send an
// integer that will update a ProgressBar
backgroundWorker1.ReportProgress(i);
// Periodically check if a cancellation request is pending.
// If the user clicks cancel the line
// m_AsyncWorker.CancelAsync(); if ran above. This
// sets the CancellationPending to true.
// You must check this flag in here and react to it.
// We react to it by setting e.Cancel to true and leaving
if (backgroundWorker1.CancellationPending)
{
// Set the e.Cancel flag so that the WorkerCompleted event
// knows that the process was cancelled.
e.Cancel = true;
backgroundWorker1.ReportProgress(0);
return;
}
}

//Report 100% completion on operation completed
backgroundWorker1.ReportProgress(100);
}

private void btnStartAsyncOperation_Click(object sender, EventArgs e)
{
//Change the status of the buttons on the UI accordingly
//The start button is disabled as soon as the background operation is started
//The Cancel button is enabled so that the user can stop the operation
//at any point of time during the execution
btnStart.Enabled = false;
btnCancel.Enabled = true;

// Kickoff the worker thread to begin it's DoWork function.
backgroundWorker1.RunWorkerAsync();
}

private void btnCancel_Click(object sender, EventArgs e)
{
if (backgroundWorker1.IsBusy)
{

// Notify the worker thread that a cancel has been requested.

// The cancel will not actually happen until the thread in the

// DoWork checks the backgroundWorker1.CancellationPending flag.

backgroundWorker1.CancelAsync();
}
}
}
}

Answer
/*...*/
using (ZipFile zip = ZipFile.Read(ROBOT_INSTALL_SPECIAL))
        {
            zip.ExtractProgress += 
               new EventHandler<ExtractProgressEventArgs>(zip_ExtractProgress);
            zip.ExtractAll(ROBOT0007, ExtractExistingFileAction.OverwriteSilently);

        }
/*...*/

void zip_ExtractProgress(object sender, ExtractProgressEventArgs e)
{
   if (e.TotalBytesToTransfer > 0)
   {
      progressBar1.Value = Convert.ToInt32(100 * e.BytesTransferred / e.TotalBytesToTransfer);
   }
}