How I do change WPF background color programmatically?

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Hi.

In my WPF test project I tried to make the style dynamically changeable through a combobox. Everything works except the background color of the windows.

Can you help me?

The source code is here.
https://github.com/reddevlab/WpfCambioStile
Thank you!

What I have tried:

I have tried with StaticResource, with SolidColorBrush, with the same name, with different name of static resource but it does not work!

Posted 1-Jul-21 2:22am

Red.Devlab

Updated 1-Jul-21 3:39am

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CHill60 1-Jul-21 8:29am

I am unable to follow that link. Post the relevant code in your question - you can use the "Improve Question" link to add the information

Richard Deeming 1-Jul-21 8:52am

Try using DynamicResource instead:

Style="{DynamicResource BaseStyle}"

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Chris Copeland · Accepted Answer · 2021-07-01T03:39:00

Richard Deeming is correct, you've used the DynamicResource to allocate the styles to the elements, but the styles themselves are using StaticResource to allocate the colours. You need to amend the styles themselves to use dynamic resources:

C#

<Style x:Key="BaseStyle" TargetType="{x:Type Control}" >
    <Setter Property="Background" Value="{DynamicResource FormBackground}" />
</Style>

A StaticResource is resolved and assigned when the style is loaded, and any changes to that resource won't be reflected. The DynamicResource uses an expression to resolve the value, so changes can be reflected.