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I am working on migrating xamarin forms application to .net maui.

as part of migration i am working on reusing the xamarin forms renderers in .net maui with "Microsoft.Maui.Controls.Compatibility" package.

when i am registering the renderer in MauiProgram.cs using ConfigureMauiHandlers getting error

below is my code in MauiProgram.cs to ConfigureMauiHandlers. Getting error for

typeof(CardReaderViewRenderer) as this is the iOS implementation of Renderer.

Error : The type or namespace name 'CardReaderViewRenderer' could not be found (are you missing a using directive or an assembly reference?)

 var builder = MauiApp.CreateBuilder();
            builder
                .UseMauiApp<App>()
                .UseMauiCompatibility()
                .ConfigureMauiHandlers(handlers =>
                {
                    handlers.AddCompatibilityRenderer(typeof(CardReaderView), typeof(CardReaderViewRenderer));

#if __IOS__

                    
#elif __ANDROID__
#endif
                });
KargWare
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user20694704
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1 Answers1

0

As the error show, that may due to the loss of the assembly reference so the CardReaderViewRenderer cannot be found.

You could try code like this:

.ConfigureMauiHandlers((handlers) =>
        {
#if ANDROID
            handlers.AddHandler(typeof(CardReaderView),typeof(XamarinCustomRenderer.Droid.Renderers.CardReaderViewRenderer));
#elif IOS
            handlers.AddHandler(typeof(CardReaderView), typeof(XamarinCustomRenderer.iOS.Renderers.CardReaderViewRenderer));
#endif
        });

For more info, you could refer to Use custom renderers in .NET MAUI and sample code

Liqun Shen-MSFT
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  • Thanks for the reply. I have tried your suggestion. But still getting errors. "XamarinCustomRenderer" is the project name from above link "Use custom renderers in .NET MAUI ". – user20694704 Mar 10 '23 at 08:33
  • So what's the namespace for CardReaderViewRenderer? You just migrate this file from Xamarin Forms project – Liqun Shen-MSFT Mar 10 '23 at 14:28
  • naemspace for CardReaderViewRenderer is LibraryTestAppMaui.iOS. CardReaderViewRenderer. I have migrated xamarin project to .net maui. My project is not a single project. Having forms, iOS, android projects. – user20694704 Apr 04 '23 at 11:14