How to load the progress at the same time my method is running

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I have a long running method , so created a progress bar to show what percentage my method was to completing but I am having difficulty figuring out how to since my progress bar with my method => excelHelper.InsertNewRows();.

What I have tried:

Code:

public void ButtonSubmit_Click(object sender, EventArgs e)
    {
        if (isProcessRunning)
        {
            MessageBox.Show("A Process is aleady running");
            return;
        }


        Thread backgroundThread = new Thread(
            new ThreadStart(() =>
            {
                for (int n = 0; n < 100; n++)
                {

                    isProcessRunning = true;
                    Thread.Sleep(50);
                    progressBar1.Invoke(
                        new Action(() =>
                        {
                            progressBar1.Value = n;
                            label3.Text = ("Progress: " + n+ "%");

                        }

                     ));
                }
                MessageBox.Show("Thread completed!");
                progressBar1.Invoke(
                    new Action(() =>
                    {
                        progressBar1.Value = 0;

                    }
                    ));
                isProcessRunning = false;

            }
            ));
        backgroundThread.Start();
        excelHelper.InsertNewRows();
        var folder = TextOutputFile.Text + @"\" +
        DateTime.Now.ToString("yyyy_MM_dd_") + "SA_Analysis_Report.xlsx";
        excelHelper.Save(folder);
        MessageBox.Show("File has been added to file");
    }

Posted 6-Aug-19 3:09am

KGr28

Updated 8-Aug-19 6:17am

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2 solutions

Solution 1

I am not sure what your actual problem is, but there are many examples of how to use ProgressBars to be found at c - Google Search[^]

Posted 6-Aug-19 3:18am

Richard MacCutchan

Comments

KGr28 6-Aug-19 10:24am

My question is:

I have a long running method, so I created a progress bar to show what percentage my method was to completing, but I am having difficulty figuring out how to do this ,syncing my progress bar with my method => excelHelper.InsertNewRows();.
Basically my progress bar representing how long the function has to run.

Richard MacCutchan 6-Aug-19 10:47am

Follow the link above; the first item even has the sample code you need.

KGr28 6-Aug-19 10:52am

The issue isn't getting the progressbar to work it is getting it to run synchronous with my function so:

What I want it to do:

When I click on the submit button I want it to fire both my ProgressBar and method at the same time , the progressBar should Monitor the length of time it takes my method to complete from 0% to 100% .

What it is doing:
When I click on the ButtonSubmit_Click button it hits my thread with my code for my progressBar ignores it, then it statrts my method , without loading my progressbar

The Link you provided doesn't show how to do that.

Richard MacCutchan 6-Aug-19 11:11am

Here is a CodeProject article with full source code: BackgroundWorker and ProgressBar demo[^].

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Richard Deeming · Accepted Answer · 2019-08-08T06:18:00

If you want the progress bar to match the progress of your method, then you'll need to update your method to report its progress. Use the IProgress<T> interface and the Progress<T> class to manage the communication.

IProgress<T> Interface (System) | Microsoft Docs[^]
Progress<T> Class (System) | Microsoft Docs[^]

If you want your UI to update whilst the method is running, you'll need to run it on a background thread. Eg:

C#

public void ButtonSubmit_Click(object sender, EventArgs e)
{
    SubmitAsync();
}

private async Task SubmitAsync()
{
    if (isProcessRunning)
    {
        MessageBox.Show("A Process is aleady running");
        return;
    }
    
    var progress = new Progress<int>(n =>
    {
        progressBar1.Value = n;
        label3.Text = ("Progress: " + n+ "%");
    });
    
    string outputFile = TextOutputFile.Text;
    
    isProcessRunning = true;
    
    await Task.Run(() =>
    {
        excelHelper.InsertNewRows(progress);
        
        string fileName = Path.Combine(outputFile, DateTime.Now.ToString("yyyy_MM_dd_") + "SA_Analysis_Report.xlsx");
        excelHelper.Save(fileName);
    });
    
    MessageBox.Show("File has been added to file");
    progressBar1.Value = 0;
    isProcessRunning = false;
}

NB: The callback passed to the Progress<T> class is automatically invoked through the SynchronizationContext captured when the instance is constructed. You don't need to worry about using Invoke to update the UI in the callback.