Wpf custom control binding not updating


05-Dec-2017 16:38

You might want to read something on debugging bindings as well, then you can spot such errors as they will be reported by the binding engine.

(something like "property x not found on object y").

Register Attached("My Value", typeof(string), typeof(Example Control), new Framework Property Metadata ); public string My Value // In constructor, to make it work.

wpf custom control binding not updating-31

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In my View Model I have an instance of a class that holds multiple properties that express values that relate to the user control as well as to items that control manipulates.

I believe this is common when using bindings within XAML, if a binding is not valid it never reports an issue if the property can initialize with a default value. The problem I created for myself was that I defined the class in a separate file, and thought that I needed to create a property for the class instance that raised the INotify Property Changed in my View Model, this obscured that everything was happening in the class code and ignoring the property that I created.

This makes it difficult to execute methods that rely on knowing when the class properties change.

The problem is, that when I bind property from e.g. I went through quite a few pages and tried a lot of options, but none of it worked.

At the end, I finally found a working solution which involves changing // Relevant code public static readonly Dependency Property My Value Property = Dependency Property. Data Context = this; If I understand you correctly, this solution works with that line (// In constructor, to make it work. Is it because you can't properly update the class instance property by itself and instead have to update the entire class instance whenever changes occur?



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