CS0234 error message: - Error CS0234 The type or namespace name 'GetRenderer' does not exist in the namespace 'Microsoft.Maui.Controls.Compatibility.Platform' (are you missing an assembly reference?)

Question

Hello,

I am porting some Xamarin code into .NET MAUI and I received the following error message error messages on lines 21, line 22, line 33, line 34, line 44 and line 50: -

Error CS0234 The type or namespace name 'GetRenderer' does not exist in the namespace 'Microsoft.Maui.Controls.Compatibility.Platform' (are you missing an assembly reference?)  


using Rg.Plugins.PopupMaui.iOS.Renderers;  
using Rg.Plugins.PopupMaui.Pages;  
using UIKit;  
using Microsoft.Maui.Controls.Compatibility.Platform.iOS;  
using Rg.Plugins.PopupMaui.Extensions;  
using OnPlatform = Microsoft.Maui.Controls.Compatibility.Platform;  
  
namespace Rg.Plugins.PopupMaui.iOS.Extensions  
{  
    internal static class PlatformExtension  
    {  
        private static bool IsiOS13OrNewer => UIDevice.CurrentDevice.CheckSystemVersion(13, 0);  
  
        public static IVisualElementRenderer GetOrCreateRenderer(this VisualElement bindable)  
        {  
  
  
            var renderer = OnPlatform.GetRenderer(bindable);  //CS0234 error  
            if (renderer == null)  
            {  
                renderer = OnPlatform.CreateRenderer(bindable);  //CS0234 error  
                OnPlatform.SetRenderer(bindable, renderer);   //CS0234 error  
            }  
            return renderer;  
        }  
  
        public static void DisposeModelAndChildrenRenderers(this VisualElement view)  
        {  
            IVisualElementRenderer renderer;  
#pragma warning disable CS0618 // Type or member is obsolete  
            foreach (var child in view.RgDescendants().OfType<VisualElement>())  
            {  
                renderer = OnPlatform.GetRenderer(child);  //CS0234 error  
                OnPlatform.SetRenderer(child, null);   //CS0234 error  
  
                if (renderer == null)  
                    continue;  
  
                renderer.NativeView.RemoveFromSuperview();  
                renderer.Dispose();  
            }  
#pragma warning restore CS0618 // Type or member is obsolete  
  
            renderer = OnPlatform.GetRenderer(view);   //CS0234 error  
            if (renderer != null)  
            {  
                renderer.NativeView.RemoveFromSuperview();    
                renderer.Dispose();  
            }  
            OnPlatform.SetRenderer(view, null); //CS0234 error  
        }  

Kindly help me to fix the CS0234 error messages

Answer 1

Hello,

In MAUI, some render classes are replaced by handlers, you can try to use Microsoft.Maui.Controls.Handlers.Compatibility.VisualElementRenderer.

Best Regards,
Wenyan Zhang

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