Data binding establishes a connection between the application UI and business logic. You no longer have to write code that updates your UI or pass values down to your business logic.When it breaks, it can be frustrating to figure out what went wrong.Let’s say you try this: You will not receive an error for trying to set the user control’s data context.You will, however, discover that all data binding has stopped working. Rather than explain why this is happening, let me simply share the solution.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.By day, Michael is a solutions architect at Amerisource Bergen Specialty Group where he delivers high quality enterprise software in . By night, he writes mobile applications in Java for the Andriod platform.
To use the value converter, reference the namespace of the assembly that contains the converter and add an instance of it to the resources of your window.Two way binding is used when we want to update some controls property when some other related controls property change and when source property change the actual control also updates its property.I think this sentence is hard to understand :) Let me explain you with an example.This event is to be fired every time one of the properties is changed.The problem with this interface is in the code that consumes it.property in WPF is extremely handy, because it is automatically inherited by all children of the element where you assign it; therefore you don’t need to set it again on each element you want to bind.