dependency-properties

I'm currently attempting to create a custom control out of a DataGridTemplateColumn that will be reused across many of our applications. I'm running into some issues getting a dependency property on the custom control to bind and raise the property changed notification correctly. I currently have the control inheriting from DataGridTemplateColumn the xaml looks like this: <DataGridTemplateColumn x:Class="Controls.DataGridDateColumn" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"> <DataGridTemplateColumn.CellTemplate>

I have created a UserControl with some DependencyProperties (in the example here only one string property). When I instantiate the Usercontrol, I can set the property of the UserControl and it is shown as expected. When I am trying to replace the static text by Binding, nothing is displayed. My UserControl looks as follows: <User Control x:Class="TestUserControBinding.MyUserControl" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:d="http:/

I read this in the following link:- http://www.informit.com/articles/article.aspx?p=688529&seqNum=2 However, because GetValue and SetValue internally use an efficient sparse storage system and because IsDefaultProperty is a static field (rather than an instance field), the dependency property implementation saves per-instance memory compared to a typical .NET property. If all the properties on WPF controls were wrappers around instance fields (as most .NET properties are), they would consume a significant amount of memory because of all the local data attached to each instance. But eventually

I'm trying to figure out what exactly Dependency Properties are, but when I look anywhere for a definition, I only find "how to use" but not "what it is". Imagine you are asked on a job interview - what is a dependency property. What would be your answer? A DependencyProperty is a property whose value depends (or can depend) on some other source (such as animation, data binding, styles, or visual tree inheritance). A regular property's value is stored in the object it belongs to, while you can think of a dependency property as being stored in a database somewhere. This database is essentially

How can one register a dependency property whose value is calculated using the value of another dependency property? Because the .NET property wrappers are bypassed by WPF at run-time, one should not include logic in the getters and setters. The solution to that is typically to use PropertyChangedCallback s. But those are declared static. For example, what is the proper way to accomplish this contrived task: public bool TestBool { get { return (bool)GetValue(TestBoolProperty); } set { SetValue(TestBoolProperty, value); TestDouble = ((value)?(100.0):(200.0)); // HERE IS THE DEPENDENCY } }

How to bind to a WPF dependency property when the datacontext of the page is used for other bindings? (Simple question) Thomas Bratt The datacontext of the element needed to be set. XAML: <Window x:Class="WpfDependencyPropertyTest.Window1" x:Name="mywindow"> <StackPanel> <Label Content="{Binding Path=Test, ElementName=mywindow}" /> </StackPanel> </Window> C#: public static readonly DependencyProperty TestProperty = DependencyProperty.Register("Test", typeof(string), typeof(Window1), new FrameworkPropertyMetadata("Test")); public string Test { get { return (string)this.GetValue(Window1