Multiple properties with name 'BadgeView.Shared.CircleView.CornerRadius' found

[ashishbpatil1]

Details about Problem
Versions:
Xamarin.Forms: 3.3.0.967583
BadgeView: 2017.10.17

Problem

Multiple properties with name 'BadgeView.Shared.CircleView.CornerRadius' found

I am getting this error after updating xamarin forms to the latest stable version with BadgeView nuget packages.

Verbose Logs

{Xamarin.Forms.Xaml.XamlParseException: Position 8:81. Multiple properties with name 'BadgeView.Shared.CircleView.CornerRadius' found. ---> 
System.Reflection.AmbiguousMatchException: Ambiguous match found.
 at System.RuntimeType.GetPropertyImpl (System.String name, System.Reflection.BindingFlags bindingAttr, 
System.Reflection.Binder binder, System.Type returnType, System.Type[] types, System.Reflection.ParameterModifier[] modifiers) [0x00061] in <43dbbdc147f2482093d8409abb04c233>:0 
at System.Type.GetProperty (System.String name) [0x0000e] in <43dbbdc147f2482093d8409abb04c233>:0 
at System.Reflection.RuntimeReflectionExtensions.GetRuntimeProperty (System.Type type, System.String name) [0x00006] in <43dbbdc147f2482093d8409abb04c233>:0 
at Xamarin.Forms.Xaml.ApplyPropertiesVisitor+<>c__DisplayClass36_0.<TrySetValue>b__1 () [0x00000] in D:\a\1\s\Xamarin.Forms.Xaml\ApplyPropertiesVisitor.cs:488 
--- End of inner exception stack trace ---
at Xamarin.Forms.Xaml.CreateValuesVisitor.Visit (Xamarin.Forms.Xaml.ElementNode node, Xamarin.Forms.Xaml.INode parentNode) [0x0026d] in D:\a\1\s\Xamarin.Forms.Xaml\CreateValuesVisitor.cs:94 
at Xamarin.Forms.Xaml.ElementNode.Accept (Xamarin.Forms.Xaml.IXamlNodeVisitor visitor, Xamarin.Forms.Xaml.INode parentNode) [0x000ac] in D:\a\1\s\Xamarin.Forms.Xaml\XamlNode.cs:149 
at Xamarin.Forms.Xaml.ElementNode.Accept (Xamarin.Forms.Xaml.IXamlNodeVisitor visitor, Xamarin.Forms.Xaml.INode parentNode) [0x00079] in D:\a\1\s\Xamarin.Forms.Xaml\XamlNode.cs:145 
at Xamarin.Forms.Xaml.ElementNode.Accept (Xamarin.Forms.Xaml.IXamlNodeVisitor visitor, Xamarin.Forms.Xaml.INode parentNode) [0x00079] in D:\a\1\s\Xamarin.Forms.Xaml\XamlNode.cs:145 
at Xamarin.Forms.Xaml.ElementNode.Accept (Xamarin.Forms.Xaml.IXamlNodeVisitor visitor, Xamarin.Forms.Xaml.INode parentNode) [0x00079] in D:\a\1\s\Xamarin.Forms.Xaml\XamlNode.cs:145 
at Xamarin.Forms.Xaml.ElementNode.Accept (Xamarin.Forms.Xaml.IXamlNodeVisitor visitor, Xamarin.Forms.Xaml.INode parentNode) [0x00079] in D:\a\1\s\Xamarin.Forms.Xaml\XamlNode.cs:145 
at Xamarin.Forms.Xaml.ElementNode.Accept (Xamarin.Forms.Xaml.IXamlNodeVisitor visitor, Xamarin.Forms.Xaml.INode parentNode) [0x00079] in D:\a\1\s\Xamarin.Forms.Xaml\XamlNode.cs:145 
at Xamarin.Forms.Xaml.ElementNode.Accept (Xamarin.Forms.Xaml.IXamlNodeVisitor visitor, Xamarin.Forms.Xaml.INode parentNode) [0x00079] in D:\a\1\s\Xamarin.Forms.Xaml\XamlNode.cs:145 
at Xamarin.Forms.Xaml.ElementNode.Accept (Xamarin.Forms.Xaml.IXamlNodeVisitor visitor, Xamarin.Forms.Xaml.INode parentNode) [0x00079] in D:\a\1\s\Xamarin.Forms.Xaml\XamlNode.cs:145 
at Xamarin.Forms.Xaml.ElementNode.Accept (Xamarin.Forms.Xaml.IXamlNodeVisitor visitor, Xamarin.Forms.Xaml.INode parentNode) [0x00079] in D:\a\1\s\Xamarin.Forms.Xaml\XamlNode.cs:145 
at Xamarin.Forms.Xaml.ElementNode.Accept (Xamarin.Forms.Xaml.IXamlNodeVisitor visitor, Xamarin.Forms.Xaml.INode parentNode) [0x00079] in D:\a\1\s\Xamarin.Forms.Xaml\XamlNode.cs:145 
at Xamarin.Forms.Xaml.RootNode.Accept (Xamarin.Forms.Xaml.IXamlNodeVisitor visitor, Xamarin.Forms.Xaml.INode parentNode) [0x00044] in D:\a\1\s\Xamarin.Forms.Xaml\XamlNode.cs:200 
at Xamarin.Forms.Xaml.XamlLoader.Visit (Xamarin.Forms.Xaml.RootNode rootnode, Xamarin.Forms.Xaml.HydrationContext visitorContext) [0x00054] in D:\a\1\s\Xamarin.Forms.Xaml\XamlLoader.cs:140 
at Xamarin.Forms.Xaml.XamlLoader.Load (System.Object view, System.String xaml) [0x00058] in D:\a\1\s\Xamarin.Forms.Xaml\XamlLoader.cs:89 
at Xamarin.Forms.Xaml.XamlLoader.Load (System.Object view, System.Type callingType) [0x00026] in D:\a\1\s\Xamarin.Forms.Xaml\XamlLoader.cs:67 
at Xamarin.Forms.Xaml.Extensions.LoadFromXaml[TXaml] (TXaml view, System.Type callingType) [0x00000] in D:\a\1\s\Xamarin.Forms.Xaml\ViewExtensions.cs:36 
 }

XAML code

<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:badge="clr-namespace:BadgeView.Shared;assembly=BadgeView.Shared"
             x:Class="Abc.IndexPage">
    <ContentPage.Content>
        <badge:BadgeView x:Name="badgeEvent" Text="0" WidthRequest="120" BadgeColor="Red" VerticalOptions="Start" HorizontalOptions="End" />
    </ContentPage.Content>
</ContentPage>

Expected behaviour

1. No errors
2. It should support xamarin forms latest stable.

[ashishbpatil1]

I don't know what causes the issue but after spending 8 hour I finally made it.
So, to solve the problem I wrote custom BadgeView control just like this one but some changes in it.
(Note: I actually tried exact code but it gives same error so the changes!)

CircleView.cs
Note: Comment the CornerRadius property.

    public class CircleView : BoxView
    {
        //public static readonly BindableProperty CornerRadiusProperty = BindableProperty.Create(nameof(CornerRadius), typeof(double), typeof(CircleView), 0.0);
        //public double CornerRadius
        //{
        //    get { return (double)GetValue(CornerRadiusProperty); }
        //    set { SetValue(CornerRadiusProperty, value); }
        //}
    }

For android:
CircleViewRenderer.cs
Note: Added hard coded value for CornerRadius (16)

public class CircleViewRenderer : BoxRenderer
    {
        private float _cornerRadius;
        private RectF _bounds;
        private Path _path;
        public CircleViewRenderer(Context context)
           : base(context)
        {
        }
        public static void Initialize() { }
        protected override void OnElementChanged(ElementChangedEventArgs<BoxView> e)
        {
            base.OnElementChanged(e);

            if (Element == null)
            {
                return;
            }
            var element = (CircleView)Element;

            _cornerRadius = TypedValue.ApplyDimension(ComplexUnitType.Dip, (float)16, Context.Resources.DisplayMetrics);

        }

        protected override void OnSizeChanged(int w, int h, int oldw, int oldh)
        {
            base.OnSizeChanged(w, h, oldw, oldh);
            if (w != oldw && h != oldh)
            {
                _bounds = new RectF(0, 0, w, h);
            }

            _path = new Path();
            _path.Reset();
            _path.AddRoundRect(_bounds, _cornerRadius, _cornerRadius, Path.Direction.Cw);
            _path.Close();
        }

        public override void Draw(Canvas canvas)
        {
            canvas.Save();
            canvas.ClipPath(_path);
            base.Draw(canvas);
            canvas.Restore();
        }
    }

For iOS:
CircleViewRenderer.cs
Note: Added hard coded value for CornerRadius (16)
iOS code is not tested yet.

public class CircleViewRenderer : BoxRenderer
   {
       protected override void OnElementChanged(ElementChangedEventArgs<BoxView> e)
       {
           base.OnElementChanged(e);

           if (Element == null)
               return;

           Layer.MasksToBounds = true;
           //Layer.CornerRadius = (float)((CircleView)Element).CornerRadius / 2.0f;
           Layer.CornerRadius = (float)(16) / 2.0f;
       }
   }

That's it!

[pskyv]

I get the same exception after updating from xamarin forms 3.1 to 3.5 for the following code

<Grid VerticalOptions="Center"> <StackLayout HorizontalOptions="Center" VerticalOptions="Center"> <badge:CircleView CornerRadius="40" BackgroundColor="{StaticResource primary}" HeightRequest="80" WidthRequest="80" /> </StackLayout> <StackLayout Spacing="0" Orientation="Horizontal" HorizontalOptions="Center" VerticalOptions="Center"> <Label Text="{Binding BindingContext.TotalOpen, Source={x:Reference Dashboard}}" TextColor="White" FontAttributes="Bold" FontSize="18" /> </StackLayout> </Grid>

[sairamb87]

I am getting the same exception, with this plugin

Xamarin.Forms.Xaml.XamlParseException: Position 8:81. Multiple properties with name 'BadgeView.Shared.CircleView.CornerRadius' found. ---> System.Reflection.AmbiguousMatchException: Ambiguous match found.

Could you please fix this issue, it will be really helpful,

Thanks

[zsigix]

The issue lies in the names of the CircleView properties CornerRadius and CornerRadiusProperty. They're declared alongside the inherited BoxView properties of the same name, which confuses reflection in later versions of Xamarin for some reason. If you put the CircleView.cs file from the repository's source into a new project with the latest Xamarin libraries installed, these properties are said to be hiding the derived members and that, if this is what you're intending (which it is), you need to use the new keyword with the property.

These issues have already been fixed with the October 2018 commit (renaming CornerRadius to BadgeCornerRadius). The NuGet repository only has the October 2017 version, however, so pushing these latest changes to it should solve the problem.