IMarkupExtension Interface

Is this page helpful?

Any additional feedback?

Feedback will be sent to Microsoft: By pressing the submit button, your feedback will be used to improve Microsoft products and services. Privacy policy.

Definition

Namespace:

Xamarin.Forms.Xaml

Assembly:

Xamarin.Forms.Core.dll

Defines the interface for Xamarin.Forms XAML markup extensions.

public interface IMarkupExtension

type IMarkupExtension = interface

Derived

Xamarin.Forms.ConstraintExpression

Xamarin.Forms.Xaml.AppThemeBindingExtension

Xamarin.Forms.Xaml.ArrayExtension

Xamarin.Forms.Xaml.BindingExtension

Xamarin.Forms.Xaml.DataTemplateExtension

Xamarin.Forms.Xaml.DynamicResourceExtension

Xamarin.Forms.Xaml.FontImageExtension

Xamarin.Forms.Xaml.IMarkupExtension<T>

Xamarin.Forms.Xaml.NullExtension

Xamarin.Forms.Xaml.OnIdiomExtension

Xamarin.Forms.Xaml.OnPlatformExtension

Xamarin.Forms.Xaml.ReferenceExtension

Xamarin.Forms.Xaml.RelativeSourceExtension

Xamarin.Forms.Xaml.StaticExtension

Xamarin.Forms.Xaml.StaticResourceExtension

Xamarin.Forms.Xaml.TemplateBindingExtension

Xamarin.Forms.Xaml.TypeExtension

Remarks

Types implementing this interface can be used as custom XAML markup extension.

The following example shows declaration of a custom markup extension.

public class ColorMarkup : IMarkupExtension
{
  public int R { get; set; }
  public int G { get; set; }
  public int B { get; set; }

  public object ProvideValue (IServiceProvider serviceProvider)
  {
    return Color.FromRgb (R, G, B);
  }
}               

The markup extension can be used directly in XAML

<Label TextColor="{localns:ColorMarkup R=100, G=80, B=60}"/>

Methods

ProvideValue(IServiceProvider)

Returns the object created from the markup extension.