C# how to load a form with marquee progress bar?

Question

I created a loadingForm with only a progress bar with marquee style. In my mainForm I'm trying to do this:

//before downloading
loadingForm lf = new loadingForm();
lf.Show();
//start downloading
//finishdownloading
lf.Close();

The loadingForm was shown but the progress bar didn't appear, and the form looked like it was crash. after finishing downloading, the loadingForm was closed and my app continued to run normally. In loadingForm I only have:

void loadingForm_Load(object sender, EventArgs e)
{
     progressbar1.visible = true;
}

I already set progressbar1 style to marquee in loadingForm.design. How do I fix this? thanks for your help in advance.

Answer 1

You should have a look at using BackgroundWorker Class for the time consuming actions, so that the UI can continue showing the progress while the background worker thread does the work.

• How to: Use a Background Worker
• BackgroundWorker Basics in C#
• C# BackgroundWorker Tutorial