![]() By using the OneWayToSource and TwoWay modes, these Value properties can set the source properties, which are the Scale, Rotate, RotateX, and RotateY properties of the Label. For that reason, the BindingContext of each of the four sliders is set to the Label, and the bindings are set on the Value properties of the sliders. However, the BindingContext of Label can be only one object, and there are four different sliders. At first, it seems as if these four properties of the Label should be data-binding targets because each is being set by a Slider. In this example, four Slider views are intended to control the Scale, Rotate, RotateX, and RotateY properties of a Label. The following example demonstrates one common use of the OneWayToSource and TwoWay binding modes: OneTime - data goes from source to target, but only when the BindingContext changes.TwoWay - values are transferred both ways between source and target.OneWayToSource - values are transferred from the target to the source.OneWay - values are transferred from the source to the target.The solution to this and other problems involves the Mode property, which is set to a member of the BindingMode enumeration: However, each view can have only one BindingContext, so multiple data bindings on that view must all reference properties of the same object. Binding modeĪ single view can have data bindings on several of its properties. NET MAUI, bindings do not perform any implicit type conversions, and if you need to display a non-string object as a string you must provide a type converter or use StringFormat.įormatting strings must be placed in single quotation marks. The second Binding markup extension sets the StringFormat property. The ContentProperty for Binding is Path, but the “Path=” part of the markup extension can be omitted if the path is the first item in the Binding markup extension. The Binding markup extension itself can have several properties, just like the BindingBase and Binding class. However, the ReferenceExtension class that defines the x:Reference markup extension also defines a ContentProperty attribute for Name, which means that it isn’t explicitly required. The x:Reference binding extension defines a property named Name to set to the name of the referenced element, in this case slider. The Slider contains an x:Name attribute that is referenced by the two Label views using the x:Reference markup extension. The following example contains a Slider and two Label views, one of which is rotated by the Slider value and another which displays the Slider value: In this case, you set the BindingContext of the target object using the x:Reference markup extension. You can define data bindings to link properties of two views on the same page. Sometimes it’s set from the code-behind file, sometimes using a StaticResource or x:Static markup extension, and sometimes as the content of BindingContext property-element tags. However, when you define data bindings in XAML, there are multiple ways to set the BindingContext of the target object. In XAML, you must also perform the same two steps that are required in code, except that the Binding markup extension takes the place of the SetBinding call and the Binding class. A property of Label, such as Text, is associated with the bindable property TextProperty. ![]() The target property must be a bindable property, which means that the target object must derive from BindableObject.
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