How to customize the corner radius of ChipGroup items in Xamarin.Forms

This demo explains the way to customize the corner radius in ChipGroup.

How to customize the corner radius of Chipgroup items in Xamarin

To set CornerRadius value for each chipgroup items in the Xamarin ChipGroup(SfChipGroup) by the following steps.

Step 1: Create a custom chipgroup class, which is derived from SfChipGroup , and define a property named CornerRadius.

C#:

public class CustomChipGroup : SfChipGroup
{
    public static readonly BindableProperty CornerRadiusProperty =
        BindableProperty.Create("CornerRadius", typeof(Thickness), typeof(CustomChipGroup), GetDefaultCornerRadius(), BindingMode.TwoWay, null, null);

    public Thickness CornerRadius
    {
        get { return (Thickness)GetValue(CornerRadiusProperty); }
        set { this.SetValue(CornerRadiusProperty, value); }
    }

    private static Thickness GetDefaultCornerRadius()
    {
        if (Device.RuntimePlatform == Device.Android)
        {
            return 40d;
        }

        return 15d;
    }
}

Step 2: Override the OnChildAdded method and hook the ChildAdded event in that method, which will be called whenever a new child is added to SfChipGroup. In that event method, you can set the value for CornerRadius for each individual SfChip.

C#:

public class CustomChipGroup : SfChipGroup
{
    . . .
    protected override void OnChildAdded(Element child)
    {
        base.OnChildAdded(child);
        child.ChildAdded += Child_ChildAdded;
    }

    private void Child_ChildAdded(object sender, ElementEventArgs e)
    {
        var sfChip = e.Element as SfChip;
        if (sfChip != null)
        {
            sfChip.SetBinding(SfChip.CornerRadiusProperty, new Binding() { Path = "CornerRadius", Source = this, Mode = BindingMode.TwoWay });
        }
    }
}

Step 3: Unhook the ChildAdded event in OnChildRemoved override method.

C#:

public class CustomChipGroup : SfChipGroup
{
    . . .
    protected override void OnChildRemoved(Element child)
    {
        child.ChildAdded -= Child_ChildAdded;
        base.OnChildRemoved(child);
    }
}

Step 4: Set the CornerRadius value for customized SfChipGroup.

XAML:

<local:CustomChipGroup ItemsSource="{Binding Items}" 
                                              DisplayMemberPath="Name"     
                                              CornerRadius="0"/>

Also refer our feature tour page to know more features available in our chips.

Troubleshooting

Path too long exception

If you are facing path too long exception when building this example project, close Visual Studio and rename the repository to short and build the project.