The type 'RadioButton' does not support direct content

Question

I am using the new RadioButton in Xam.Forms 5
The Android implementation doesn't support views, so I must have a different layout according to the platform.

Something like this, for example:

<RadioButton Value="{x:Static local:UdpTransmitMode.UdpUnicast}" >  
   <OnPlatform x:TypeArguments="Content">  
      <On Platform="iOS" Value="Apple" />  
      <On Platform="Android, UWP" Value="Google" />  
   </OnPlatform>			  
</RadioButton>  

But I get the error The type 'RadioButton' does not support direct content

But it does, I can

<RadioButton Content="GOOGLE"  
    Value="{x:Static local:SettingsMode.GOOG}" />  

Without any issues.

I am following the examples on the page: https://learn.microsoft.com/en-us/xamarin/xamarin-forms/user-interface/radiobutton#respond-to-radiobutton-state-changes

..what am I doing wrong?

Answer 1

Hello,

Welcome to Microsoft Q&A!

The error shows that we should use OnPlatform inside the RadioButton.Content tag , and specify the actual type as x:TypeArguments.

Please refer to official sample code .

---

First I tried with type x:String and x:Object get the following result

   <RadioButton >  
           <RadioButton.Content>  
               <OnPlatform x:TypeArguments="x:String">  
                   <On Platform="iOS" Value="Apple" />  
                   <On Platform="Android, UWP" Value="Google" />  
               </OnPlatform>  
           </RadioButton.Content>  
       </RadioButton>  

   <RadioButton >  
           <RadioButton.Content>  
               <OnPlatform x:TypeArguments="x:Object">  
                   <On Platform="iOS" Value="Apple" />  
                   <On Platform="Android, UWP" Value="Google" />  
               </OnPlatform>  
           </RadioButton.Content>  
       </RadioButton>  

---

Then I following the way provided by docs but still no luck

   xmlns:sys="clr-namespace:System;assembly=mscorlib"  
     
   <RadioButton >  
           <RadioButton.Content>  
               <OnPlatform x:TypeArguments="sys:String">    //sys:Object does not work either  
                   <On Platform="iOS" Value="Apple" />  
                   <On Platform="Android, UWP" Value="Google" />  
               </OnPlatform>  
           </RadioButton.Content>  
       </RadioButton>  

---

Xamarin.Forms 5.0 defines the type of RadioButton.Content as object not string , maybe it is the cause.

I'm afraid we have to use Binding .

   public string myContent {  
               get  
               {  
                   if (Device.RuntimePlatform == Device.iOS)  
                       return "Apple";  
                   else if (Device.RuntimePlatform == Device.UWP | Device.RuntimePlatform == Device.Android)  
                       return "Google";  
                   return "";  
               }  
           }  
     
     
   <RadioButton Content="{Binding myContent}" />  

---

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