Wpf binding not updating propertychanged

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A very common problem, and one that’s usually a very simple fix once you’ve tracked it down.

Normally my View Models inherit from my View Model Base base class, which provides a Raise Property Changed method and, when in debug mode, uses reflection to check if the property name is valid.

The rough outline for this series is as follows: To understand what databinding is and the service it provides us with, it is worth looking at how you wire-up a user-interface without using databinding.

We'll start with a simple model object, or business object, and see how we can take the properties that this object exposes and display them in the UI using standard controls.

There are a whole host of UI patterns that have been developed in order to keep the model and the view separate (MVP, MVC, MVVM etc...) We'll look at how to manage the interactions between the model and the view without the help of a binding framework.

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Note, that I am making the assumption that your code will contain some sort of model object. You could store your data within the UI controls directly, however this rapidly becomes un-maintainable.We can see that we have three separate flows of data: The code for each of these three steps is distributed throughout our code, in the constructor and a variety of event handler.For each model property that we wish to expose to our user via the view, we have to add code to perform each of these three tasks.The idea being that the binding framework takes care of all three of the tasks above.We simply state that we wish to synchronise a model property with a property of a UI control, and it does the rest.

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