dependency-properties

I am having a hard time figuring out good reasons for the dependency property. Why the System.Controls.TextBox "Text" property a dependency property and not a normal property? What benefits does it serve being a dependency property? One of the things I am trying to accomplish is to add a ValidationRules property to my UserControl which will contain other validation rules. Like here: <customControls:RequiredTextBox.ValidationRules> <validators:NotNullOrEmptyValidationRule ErrorMessage="FirstName cannot be null or empty"/> </customControls:RequiredTextBox.ValidationRules> The problem is that I

I have an application written in wpf, which downloads some webpages, parses html code and saves some values. class ListOfItems { public List<SomeObject> ListToBind; public void DownloadItems() { Task.Factory.StartNew(() => { ... ... if (OnDownloadCompleted != null) OnDownloadCompleted(this, EventArgs.Empty); } } } class SomeObject { public string NameOfItem; public MyClass Properties; } class MyClass { public int Percentage; public SolidColorBrush Color; } This is the object model I'm using. It's simplified version and I don't want you to reorganize it, there is a reason I wrote it this way.

I have a user control, which exposes a DependencyProperty called VisibileItems Every time that property gets updated, i need to trigger another event. To achieve that, i added a FrameworkPropertyMetadata with PropertyChangedCallback event. For some reason, this event gets called only once, and doesn't trigger the next time VisibleItems is changed. XAML: <cc:MyFilterList VisibleItems="{Binding CurrentTables}" /> CurrentTables is a DependencyProperty on MyViewModel. CurrentTables gets changed often. I can bind another WPF control to CurrentTables, and i see the changes in the UI. Here is the way

I am going insane trying to get this to work with even the most basic example. I cannot for the life of me get binding to work. Here is a super easy example that is not working for me. I MUST be doing something incorrect. My Custom Control in my control library assembly: public class TestControl : Control { public static readonly DependencyProperty TestPropProperty = DependencyProperty.Register("TestProp", typeof(string), typeof(TestControl), new UIPropertyMetadata(null)); public string TestProp { get { return (string)GetValue(TestPropProperty); } set { SetValue(TestPropProperty, value); } }

Possiblity: What is a dependency property? What is a dependency property? How does it differ from a normal property? What is the purpose of dependency properties? And why it is used, when it is used? Dependency property : A property that is backed by a DependencyProperty . The purpose of dependency properties is to provide a way to compute the value of a property based on the value of other inputs . These other inputs might include system properties such as themes and user preference, just-in-time property determination mechanisms such as data binding and animations/storyboards, multiple-use

I'm creating a WPF app using the MVVM design pattern, and I'm trying to extend the TabItem control so that it closes the tab when the user clicks the middle mouse button. I'm trying to achieve this using InputBindings, and it works very well until I try to define it within a style. I've learned that you cannot add InputBindings to a style unless you attach it using a DependencyProperty. So I followed this similar post here... and it works... almost. I can close one tab using the middle mouse button, but it won't work on any of the other tabs (all of the tabs are added at runtime and inherit