How to use LinearGradientBrush and Background

Question

I'm trying to paint a background of my WPF window using LinearGradientBrush, however my code doesn't work. Here is the code

LinearGradientBrush gradientBrush = new  LinearGradientBrush( Color.FromArgb(0, 209, 227, 250),  Color.FromArgb(0, 170, 199, 238), new Point(0.5, 0), new Point(0.5, 1));
Background = gradientBrush;

Unforunatelly my window is still white. Is it possible to change the Background color of the window using code behind ?

Both of your Colors are Transparent so the `Background` will appear as black unless you have `AllowsTransparency` set to true. I guess you mean to use 255 instead of 0 for Alpha channel. If you try to set that `Background` in the Windows constructor and you still can't see it, then it's because some other control in your `Window` (probably a `Panel`) has another `Background` set. Try to set it in a `Window` without any controls in it. — Fredrik Hedblad, Sep 11 '11 at 21:09
@H.B. No good reason, just started writing it as a comment since the OP said his `Window` was still `White`. Probably should have posted an answer instead.. — Fredrik Hedblad, Sep 11 '11 at 21:46

score 11 · Answer 1 · answered Nov 24 '12 at 22:08

You are setting the alpha setting also. Use this instead since you want the colour:

LinearGradientBrush gradientBrush = new  LinearGradientBrush( Color.FromRgb( 209, 227, 250),  Color.FromRgb(170, 199, 238), new Point(0.5, 0), new Point(0.5, 1));
Background = gradientBrush;

score 8 · Answer 2 · edited Mar 27 '22 at 19:19

8

<Border.Background>
  <LinearGradientBrush StartPoint="0 0" EndPoint="0 1">
    <LinearGradientBrush.GradientStops>
      <GradientStop Offset="0.1" Color="{Binding Path=YourBindColor1}" />
      <GradientStop Offset="1" Color="{Binding Path=YourBindColor2}" />
    </LinearGradientBrush.GradientStops>
  </LinearGradientBrush>
</Border.Background>

//Use binding colors

edited Mar 27 '22 at 19:19

Sabuncu

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answered Apr 18 '18 at 07:35

xrhstos

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score 0 · Answer 3 · answered Sep 11 '11 at 20:48

0

Setting the Window.Background to a different Brush should work.

Make sure your Background property is not databound to a property via {Binding} directive.

Also, try setting it to a more simpler Brush - for example

Background = new SolidColorBrush(Colors.Black);

answered Sep 11 '11 at 20:48

Maxim V. Pavlov

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But I need to get a gradient effect. If I use SolidColorBrush it will be just one color – wpflerner Sep 11 '11 at 20:56

How to use LinearGradientBrush and Background

3 Answers3