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Editorial Team
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Asked: 2026-05-18T04:01:00+00:00

We just ported our WinForms application to WPF. However, performance decreased dramatically. We have

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We just ported our WinForms application to WPF.
However, performance decreased dramatically.

We have a User Interface which consists of about 200 UserControl.
Each UserControl is defined by a DataGrid (= 10 columns and 3-15 rows) as well as a Panel which hosts about 10 Buttons.

They are all hosted in a ScrollViewer.

(Please don’t recommend to change the UI. I don’t have any influence on that. The customer wants to be able to scroll to any of those UserControls.)

Since we ported the whole application to WPF the startup time increased by 100%. Using WinForms we experienced startup times of 15sec whereas now, we are struggeling with 30s.

Do you have any recommandations or ideas how to improve the loading time of a UI which consists of identical UserControl where simply each UserControl is bound to a different ViewModel? (Maybe some fast cloning of the UserControl instances or sth similar?)

I am using static Resources whereever possible.
I avoid Grids and Auto Sizing whereever possible.

Hope someone can share some thoughts on that one.

Thanks,
TH

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1 Answer

  1. Editorial Team

    My final solution is a custom Virtual Panel which supports items of dynamic height.

    See http://rhnatiuk.wordpress.com/2006/12/13/implementing-a-virtualized-panel-in-wpf/ on how to create virtual panels.

    My UserControls support two states:
    – Initial
    – Loaded

    When the application is in idle the virtual Panel asks the Controls to change to the “Loaded” state. This loads the expensive UserControl.

    Like that everything is lazy loaded and as soon as the user stops scrolling the visible items are loaded.

    Maybe that helps others that are in the same sitaution.
    TH

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