CODEWITHSUNDEEP
c#.netwpfxaml
kwitee
kwitee

Reputation: 163

Create array of items from dynamic resource in XAML

I want to create an array resource of colors in XAML where each color is defined as a dynamic resource. I think that it can be done, but I can't figure out the syntax.

I have tried this: 

<x:Array Type="Color" x:Key="Colors">
    <Color>
        <DynamicResource ResourceKey="BasicBlueColor" />
    </Color>
</x:Array>

But it doesn't work, because dynamic resource can only be assigned to dependency property.

And this just simply doesn't work, but I think it describes well what I am trying to do: 

<x:Array Type="Color" x:Key="Colors">
    <Color>{DynamicResource BasicRedColor}</Color>
</x:Array>

Clarification:

Edit 2: I was under impression that the resources are defined as static or dynamic and that they must be used as defined. My thanks to @Sham for explaining it to me.

Upvotes: 0

Views: 1351

Answers (3)

Sham
Sham

Reputation: 930

Use ResourceDictionary to place multiple resources.

You may create one ResourceDictionary with name "ApplicationNameColors" and use these keys wherever required. Don't forget to add this to application/windows/etc resources before using.

DynamicResource is very different mechanism than the things you are talking about. It's recomended to use DynamicResource when your style is dependent on windows setting because DynamicResource may cost the application performance.

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                xmlns:local="clr-namespace:WpfApp1">
   <SolidColorBrush x:Key="Color1" Color="#555555" />
   <SolidColorBrush x:Key="Color2" Color="#555555" />
   <SolidColorBrush x:Key="Color3" Color="#555555" />
   <SolidColorBrush x:Key="Color4" Color="#555555" />
   <SolidColorBrush x:Key="Color5" Color="#555555" />

</ResourceDictionary>

Upvotes: 1

mm8
mm8

Reputation: 169200

You could reference the Color resources using StaticResource. This works:

<Color x:Key="BasicRedColor">Red</Color>
<Color x:Key="BasicGreenColor">Red</Color>
<x:Array Type="Color" x:Key="Colors">
    <StaticResource ResourceKey="BasicRedColor" />
    <StaticResource ResourceKey="BasicGreenColor" />
</x:Array>

If you want to to be able to switch colours at runtime, you will have to replace or modify the Color objects in the array programmatically.

An array is an array that may or may not contain some elements. It's not some kind of dependency object.

Upvotes: 3

Access Denied
Access Denied

Reputation: 9461

It's impossible, since dynamic resource should be used for dependency property in objects derived from DependencyObject, but x:Array is not a dependencyobject, this is what error says:

A 'DynamicResourceExtension' cannot be used within a 'ArrayList' collection. A 'DynamicResourceExtension' can only be set on a DependencyProperty of a DependencyObject.

Upvotes: 1

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