Accessing a resource via codebehind in WPF

Question

I have a custom collection defined in my window resources as follows  in a Sketchflow app so the window is actually a UserControl     lt UserControl Resources gt       lt ds MyCollection x Key  myKey  x Name  myName    gt   lt  UserControl Resources gt    I want to be able to refer to this collection in the codebehind  which I expected would be by the x Name  but I can t seem to access it    I can get a reference to it using  myRef    MyCollection  this FindName  myKey      but this seems hackish  Is this bad practice  and what would be better  Thanks

User · Answer

If you want to access a resource from some other class  i g  not a xaml codebehind   you can use  Application Current Resources  resourceName      from System Windows namespace

User · Answer

I got the resources on C   Desktop WPF W   NET Framework 4 8  using the code below   DefaultNamespace  Properties Resources  ResourceName

User · Answer

You can use a resource key like this    lt UserControl Resources gt       lt SolidColorBrush x Key   x Static local Foo MyKey   gt Blue lt  SolidColorBrush gt   lt  UserControl Resources gt   lt Grid Background   StaticResource  x Static local Foo MyKey      gt      public partial class Foo   UserControl       public Foo                 InitializeComponent            var brush    SolidColorBrush FindResource MyKey              public static ResourceKey MyKey   get      CreateResourceKey         private static ComponentResourceKey CreateResourceKey  CallerMemberName  string caller   null                return new ComponentResourceKey typeof Foo   caller

User · Answer

You may also use this Resources  mykey     I guess that is not much better than your own suggestion

User · Answer

Not exactly direct answer  but strongly related   In case the resources are in a different file - for example ResourceDictionary xaml  You can simply add x Class to it    lt ResourceDictionary x Class  Namespace NewClassName                      xmlns  http   schemas microsoft com winfx 2006 xaml presentation                      xmlns x  http   schemas microsoft com winfx 2006 xaml   gt       lt ds MyCollection x Key  myKey  x Name  myName    gt   lt  ResourceDictionary gt    And then use it in code behind   var res   new Namespace NewClassName    var col   res  myKey

User · Answer

You should use System Windows Controls UserControl s FindResource   or TryFindResource   methods   Also  a good practice is to create a string constant which maps the name of your key in the resource dictionary  so that you can change it at only one place

[c#] Accessing a resource via codebehind in WPF

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