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Editorial Team
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Asked: 2026-06-16T23:13:44+00:00

In my c# winform app I have a button which when clicked, it performs

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In my c# winform app I have a button which when clicked, it performs some calculations which can tke some time.

I also have a label.visible = false which I would like to label.visible = true right after the button click so that the user can see the app working away.

The thing is even when label.visible = true is the first thing in the button1_Click(object sender, EventArgs e) method, it only toggles to visible at the very end, after the calculation is performed.

How can I show the label right after the button_click?

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1 Answer

  1. Editorial Team

    There are several ways to tackle this.

    One way (the simplest) is to call

    this.Refresh();

    right after you set the Label to visible.

    Another is to do your calculations in a background thread. The easiest way to do that is to use a BackgroundWorker. Then your main thread can just continue serving the UI (refreshing the form, responding to buttons etc.) while the background worker thread performs the computation.

    See http://www.dotnetperls.com/backgroundworker for more on background worker threads.

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