Question

I am attempting to add a progress bar in my c# excel add in. The progress bar appears but it does not indicate any progress until the function is finished executing.

These are the functions in the Windows Form Class:

    public void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
    {
        for (int i = 0; i < 100; i++)
        {

            Thread.Sleep(100);

            backgroundWorker1.ReportProgress(i); //run in back thread


        }

    }



    public void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e) //call back method
    {

        progressBar1.Value = e.ProgressPercentage;

    }

    public void backgroundWorker1_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e) //call back method
    {

        progressBar1.Value = progressBar1.Maximum;

    }

This is how I call the function from the add in button:

    private void buttonClicked(object sender, RibbonControlEventArgs e)
    {
        AddInPlanView.Form1 pBar = new AddInPlanView.Form1();

        pBar.Visible = true;

        pBar.backgroundWorker1.WorkerReportsProgress = true;

        pBar.backgroundWorker1.ProgressChanged += new System.ComponentModel.ProgressChangedEventHandler(pBar.backgroundWorker1_ProgressChanged);

        pBar.backgroundWorker1.DoWork += new System.ComponentModel.DoWorkEventHandler(pBar.backgroundWorker1_DoWork);

        pBar.backgroundWorker1.RunWorkerCompleted += new System.ComponentModel.RunWorkerCompletedEventHandler(pBar.backgroundWorker1_RunWorkerCompleted);

        pBar.backgroundWorker1.RunWorkerAsync();

        FUNCTIONTORUN();

        pBar.Visible = false;

    }

How should I change this so that the progress bar will not stop working during the execution of FUNCTIONTORUN()? The progress bar is initialized using the Visual Studio designer. The name of the progressbar object in the form class is progressbar1.

Thank YOU!

Answer 1

The DoWork event for your progress bar should be (or contain) FUNCTIONTORUN(). FUNCTIONTORUN() should use the ReportProgress method.