passed down to the child controls, we don't have to define a source on each of the bindings - we just use the values as if they were globally available. When one designs WPF UI elements in Microsoft Visual Studio or Blend, it is very beneficial to see them populated with sample data. This blog post provides step-by-step instructions for creating a user control, which exposes bindable properties, in WPF and Silverlight. Solution 1. using System; using System.ComponentModel; using System.Windows; namespace UserControlWorking { public partial class MainWindow : Window { DateHelper dtContext; public MainWindow () { InitializeComponent (); dtContext = new DateHelper (); DataContext=dtContext; dtContext.dateTime = System.DateTime.Now; dtContext.myString = "Date"; } private void WPF user control binding not worked - Microsoft Q&A This means that the FieldUserControl still inherits its parent's DataContext, so bindings to our model object will work. Using the DataContext - Welcome - The complete WPF tutorial How to react to a students panic attack in an oral exam? UserControl WPFDataContext - - - For the desperate souls, who are trying to make pdross's answer work and can't: It's missing an essential detail - Path=DataContext. defining a source for each binding, and once you really start using data bindings, you will definitely appreciate the time and typing saved. WPFUserControlBinding C# UserControlBinding UserControl <Button Content= "OK" Width= "75" Margin= "15 8 15 8" x:Name= "ButtonOk" /> ButtonOk CommandWindowBinding xaml .csDependencyProperty example: The Code-behind for this example only adds one line of interesting code: After the standard InitalizeComponent() call, we assign the "this" reference to The DataContext property is the default source of your bindings, unless you specifically declare another source, like we did in the previous chapter with the ElementName property. Most data bound applications tend to use DataContext much more heavily than Source. Where to find XAML namespace d="http://schemas.microsoft.com/expression/blend/2008" mapping library? EVERYTHING YOU WANTED TO KNOW ABOUT DATABINDING IN WPF, SILVERLIGHT AND WP7 (PART TWO). Window WPF i dataContext. Note that once you do this, you will not need the ElementName on each binding. Calculating probabilities from d6 dice pool (Degenesis rules for botches and triggers). WPF Controls | 33-User Controls | Part 3 | Data Binding - YouTube By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Instead you should set the DataContext in the first child UI element in your control. C# Copy public MainPage() { InitializeComponent (); this.DataContext = new BookstoreViewModel (); } But if you do that then your page isn't as "designable" as it could be.