Wpf binding not updating source
And, the best part, it works and gets the job done.Your user control can be as simple as this: Now your user control can bind; and it can bind one or two way!It’s up to use to use the mode that is appropriate for the controls you are embedding in your user control.The dependency property does the rest – and that’s that! Binding inside your user control isn’t exactly obvious either.The reason is, you get an error when you attempt to set the data context of the user control.User controls are a great way couple logic and XAML in an encapsulated way. A user control contrasts with a custom control in that a custom control contains no XAML. And though it says you may safely continue, it doesn’t continue safely at all. It means the binding target isn’t a dependency property!You can reuse a user control over and over and the logic is isolated from the general flow of your program. Custom control can be (and is sometimes are required to be) templated (for example, a Data Template). This is confusing to XAML developers because they are accustomed to binding to CLR properties that implement INotify Property Changed in their view models. A data binding source source CAN be a CLR-type property.
If you don’t specify a source explicitly by setting the Source property of the binding, it will inherit the Data Context from its parent element to use as its source.
), keep in mind that binding logic that you put in the View is untestable, so keeping the meaningful logic out of bindings is usually a Good Idea.
Similarly to property bindings, you can also add custom Hack bindings for commands as well.
Bind(View Model, vm = applies the same binding hooks and type conversion that other property binding methods do, so the types don't necessarily have to match between the source and the target property.
While you could certainly build complex bindings (even ones between two view models!
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Since data context is a dependency property and dependency properties inherit down the visual tree, we can set the data context of a container and intercept the data context’s inheritance.