How to access resource values in MAUI .NET 8?

Question

Hello,

In Xamarin Forms I was accessing dynamic resources from the App.xaml.cs file using the below code

// On ViewModel

var thickness = Application.Current.Resources["BorderThickness"].GetType().GetProperty("Android").GetValue(size, null);

//App.xaml.cs

<OnPlatform x:TypeArguments="Thickness" x:Key="BorderThickness">

<On Platform="iOS" Value="0,20,0,0" />

<On Platform="Android" Value="5, 10" />

</OnPlatform>

// On ViewModel

var thickness = Application.Current.Resources["BorderThickness"].GetType().GetProperty("Android")

.GetValue(Application.Current.Resources["BorderThickness"], null);

The App crashes when I try to get the value in MAUI .NET 8. How to achieve this in .NET MAUI?

Answer 1

Hello,

The App crashes when I try to get the value in MAUI .NET 8. How to achieve this in .NET MAUI?

You can do it by Application.Current.Resources.TryGetValue like following code.

var res =Application.Current.Resources.TryGetValue("BorderThickness", out object r2) ;
 
      if (res)
      {
          Microsoft.Maui.Controls.OnPlatform<Microsoft.Maui.Thickness> resThickness = (Microsoft.Maui.Controls.OnPlatform<Microsoft.Maui.Thickness>)r2;
         var AndroidPlatformsThinkness = resThickness.Platforms[1].Value;
    
      }

Here is a document about:Access resources by key from code

Best Regards,

Leon Lu

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