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What is omitted from all of these is a lowest common denominator fully working example that is useful (or at least can be extended to be useful). Provide a second example that builds on the first in order to illustrate the advanced concepts like callbacks.
Thanks thanks for this wonderful tutorial it really helped me a lot to understand Dependency Properties , I just still have a question , I don't understand the fact that the dependency property is declared as static so how comes that every instance has its own value this is the only misundestanding I still have I need your help , thanks in advance .
This sequence is a bit simplified, but it shows the main concept. Important: Do not add any logic to these properties, because they are only called when you set the property from code.
To create a Dependency Property, add a static field of type to create an instance of a dependency property. If you set the property from XAML the Set Value() method is called directly.
To set the value of an attached property, add an attribute in XAML with a prefix of the element that provides the attached property. But an much easier way is to get the Thank you for spending the time to prepare this article.
I have already read the MSDN articles on dependency properties as well as Pro WPF and Silverlight MVVM: Effective Application Development with Model-View-View Model (Apress 2010), so understanding your article was easy for me.
A good example is a progress bar with a Value set below the Minimum or above the Maximum.
Also, i couldn't use 'Listen to dependency property changes' section. I understand that when storring only changes it reduces memory storage but what does it mean that the default values are "stored within the dependency property"? You wrote that DP are stored in Dictionary instaed of Field like Normal properties. I understood that there are " Readonly DP" but i have noticed that when using the shortcutin Visual Studio for creating regular DP (propdp) a " public static readonly Dependency Property My Property" is added. At the begining when you expalnied about the advantages one of them was " Reduced memory footprint" u wrote that when using DP it reduces memory storage compare to Normal Properties because it "only stores modified properties in the instance & The default values are stored once within the dependency property". why when updating data from Model to View we have to use DP or Notifty Property Change instead of normal property, and when updating data from View to Model we have to use Normal Property?
i mean they must be stored somewhere when application runs, so where would that be? i wanted to know how is this fact empowers DP compared to normal Prop'. so what is the difference when adding "readonly" statement in regular DP and Read Only DP? Maybe a silly question but what is the meaning of " Dependency" in Dependency Properties? Why is the dependency property must be defined as static? I understand that when storring only changes it reduces memory storage but what does it mean that the default values are "stored within the dependency property"? You wrote that DP are stored in Dictionary instaed of Field like Normal properties. I understood that there are " Readonly DP" but i have noticed that when using the shortcutin Visual Studio for creating regular DP (propdp) a " public static readonly Dependency Property My Property" is added.
Introduction Value resolution strategy The magic behind it How to create a Depdency Property Readonly Dependency Properties Attached Dependency Properties Listen to dependency property changes How to clear a local value When you begin to develop appliations with WPF, you will soon stumble across Dependency Properties. NET properties, but the concept behind is much more complex and powerful.
The main difference is, that the value of a normal .