What are the two attributes of binding element?
Question: What are the two attributes of binding element?
In this blog post, I will explain what are the two attributes of a binding element in XAML. A binding element is a way to connect a property of a UI element to a source of data, such as a property of another UI element, a property of an object, or a value returned by a method. A binding element has two attributes that specify how the binding works: Mode and UpdateSourceTrigger.
Mode is an attribute that determines the direction of data flow in the binding. There are four possible values for Mode: OneWay, TwoWay, OneTime, and OneWayToSource. OneWay means that the data flows from the source to the target, but not the other way around. TwoWay means that the data flows in both directions, from the source to the target and from the target to the source. OneTime means that the data flows from the source to the target only once, when the binding is initialized. OneWayToSource means that the data flows from the target to the source, but not the other way around.
UpdateSourceTrigger is an attribute that determines when the source of the binding is updated. There are four possible values for UpdateSourceTrigger: Default, PropertyChanged, LostFocus, and Explicit. Default means that the source is updated according to the default behavior of the binding mode. For example, in a TwoWay binding, the source is updated whenever the target property changes. PropertyChanged means that the source is updated whenever the target property changes, regardless of the binding mode. LostFocus means that the source is updated when the target element loses focus. Explicit means that the source is updated only when the UpdateSource method of the binding is called explicitly.
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