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Asked: 2026-05-25T18:39:20+00:00

In my user control I perform a lengthy operation. In order to prevent users

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In my user control I perform a lengthy operation. In order to prevent users from clicking the UI, I show a progress bar and I disable the whole UI, like this:

this.Enabled = false;
ShowProgressBar();
DoLengthyOperation();
RemoveProgressBar();
this.Enabled = true;

This works OK. However, my user control has many other controls on it, which also have controls inside them, which also have controls inside them,… etc. The 

this.Enabled = false

call thus disables many many controls. This is intentional. But the problem I have is that you can actually see the UI disabling every control one by one. It goes pretty fast but since there are so many controls, you can actually see it running through all the controls. This does not look professional, it makes the screen flicker and my eyes hurt.

Is there a way so that I can prevent the UI from redrawing until all controls are disabled and then perform a single redrawing?

I hope this is not a stupid question 😉

Don’t know if this is relevant: my controls are derived from DevExpress.XtraEditors.XtraUserControl.

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1 Answer

  1. Editorial Team

    None of the suggestion solutions seems to work.

    I think part of the problem is that I use DevExpress and every control does not directly contain its subcontrol, but uses LayoutControlGroups and LayoutControls and panels etc. The actual amount of controls used is thus a lot higher than the actual controls that you see on the screen and that need to be disabled.

    So I just added my own recursive function that disables only controls of certain types, in my case Buttons and Edit boxes. The rest is just ignored. Not only is this a lot faster, it also looks much nicer. No flickering at all any more.

    I think I’m going to use this solution, but I do appreciate the effort of everyone who put an answer or a comment here, thanks!

    Now I see that my question seems to be a duplicate of this one: How do I suspend painting for a control and its children?
    Haven’t tried that solution tough.

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