How to add progress bar to below process

Question

2.00/5 (1 vote)

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in the below code i have method to extract rar files.i want to show progress for extracting in percentage.how can i do that ?

C#

public void UnZip()
        {
           string DestinationPath = @"C:\Temp\DATA_UNITS\BusinessObjectsServer_win\response.ini";
            Shell32.Shell sc = new Shell32.Shell();
            System.IO.Directory.CreateDirectory("C:\\TEMP");
            Shell32.Folder output = sc.NameSpace("C:\\TEMP");
            string sourcePath = Application.StartupPath + "\\51047839.ZIP";
            Shell32.Folder input = sc.NameSpace(sourcePath);
            output.CopyHere(input.Items());
            System.IO.File.Delete(DestinationPath);


         }

Posted 24-Jun-14 20:42pm

santhosh0433

Updated 24-Jun-14 21:45pm

v3

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Comments

Sergey Alexandrovich Kryukov 25-Jun-14 2:53am

Progress bars are not designed to be added to a method. To start with, please tag your UI library you want to use to create your UI.
Or, talking about "ProgressBar", clearly indicate which one. Full type name, please.
—SA

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gggustafson · Accepted Answer · 2014-06-25T06:46:00

A progress bar is a UI component. As such it must execute in the main UI thread. I assume that your UnZip method is time consuming and that you want to measure its progress.

The simplest way is to execute UnZip as a BackgroundWorker[^].

Declare UnZip as a BackgroundWorker

C#

private System.ComponentModel.BackgroundWorker UnZip_BW;

as a class variable.

In the constructor, attach event handlers to UnZip_BW

C#

UnZip_BW.DoWork += new DoWorkEventHandler ( UnZip_DoWork );
UnZip_BW.ProgressChanged += 
    new ProgressChangedEventHandler ( UnZip_ProgressChanged );

You do not appear to need a worker completed event handler, but if you do, use

C#

UnZip_BW.RunWorkerCompleted += 
    new RunWorkerCompletedEventHandler ( UnZip_RunWorkerCompleted );

and declare the UnZip_RunWorkerCompleted event handler as

C#

private void UnZip_RunWorkerCompleted (
                                  object                      sender, 
                                  RunWorkerCompletedEventArgs e )
    {
    if ( e.Error != null )
        {
                                        // handle exception
        MessageBox.Show ( e.Error.Message );
        }
    else if ( e.Cancelled )
        {
                                        // report cancellation
        result_LAB.Text = "Canceled";
        }
    else
        {
                                        // report success
        result_LAB.Text = e.Result.ToString();
        }
    }

where result_LAB is declared in the Form.

Declare the UnZip_DoWork method:

C#

private void UnZip_DoWork ( object          sender, 
                            DoWorkEventArgs e )
    {   
    BackgroundWorker worker = ( BackgroundWorker ) sender;

    :
    :
    }

Place your UnZip method contents into the UnZip_DoWork method.

Declare the UnZip_ProgressChanged method. It is already wired as the event handler for the UnZip_ProgressChanged event.

C#

private void UnZip_ProgressChanged ( object                   sender,
                                     ProgressChangedEventArgs e )
    {
    this.progressBar1.Value = e.ProgressPercentage;
    }

progressBar1 is assumed to have been declared in your Form.

Here's the hard part given the code you have provided. Somewhere in the UnZip_DoWork method, when progress is to be reported, compute the percentage of work completed (percent_completed) and raise the ReportProgress event.

C#
```
int  percent_completed = 0;
:
:
worker.ReportProgress ( percent_completed );
```
The problem is that I do not see a "hook" in your supplied code where you can determine the percent completed. Without that, you cannot have a progress bar.
In the constructor, after you've attached the event handlers, add the code

C#
```
UnZip_BW.RunWorkerAsync ( );
```

Hope that helps.