XAML - Value changed over a value converter for a Material Icon

AUU 1

Hi there,

I am trying to add a Material character into a form using a converter based on a binding value.

When I use the hex desc directly it shows fine, if I use the converter, it is showing something weird.

       **<Label Text="&#xe87C;" FontSize="14" FontFamily="Material" TextColor="blue"/>  
       <Label Text="{Binding AttType, Converter={StaticResource categoryToImageConverter}}" FontSize="14" FontFamily="Material" TextColor="red"/>**  

    **public object Convert(object value, Type targetType, object parameter, CultureInfo culture)  
    {  
        //return "ABCXX";  
        return "&#xe87C;";  
    }**

mc 4,111 Reputation points

2021-01-28T06:58:56.407+00:00

you can return \uxe87c from converter.
AUU 1 Reputation point

2021-01-28T18:47:53.853+00:00

That's a cute comment :)

Quick question though, in the debug mode I can see the converter being visited, surely returns the right value. How come xamarin only shows a weird part of it ? i.e. "xe87" does not show at all ??
JessieZhang-MSFT 7,706 Reputation points Microsoft Vendor

2021-01-30T07:08:26.273+00:00

From the official document Xamarin.Forms Binding Value Converters,we know that when the source property and the target property is not the same type, we can use the IValueConverter interface to convert the source to the target type we want. From the code you posted we could find the source's type is the same as the target type(string), so we don't need to use IValueConverter .
AUU 1 Reputation point

2021-01-31T21:22:10.227+00:00

Thanks JessieZhang !

It looks like you are a pragmatist, but I am a theorist and I certainly see value for a string to string conversion as it can be a many to many mapping encapsulated in a converter.

I still did not get the answer why the renderer :

1) crop the middle of the string
2) and hence show it as a literal string rather than a character like the next example

Any other ideas why ??
JessieZhang-MSFT 7,706 Reputation points Microsoft Vendor

2021-02-02T06:45:24.307+00:00

Yes, it is just the case as you said. I am checking this problem to further investigate your problem. And I’ll get back to you as soon as I have an update. Much appreciated for your patience.

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XAML - Value changed over a value converter for a Material Icon