What is the difference between DataContext and ItemsSource?
What is the difference between DataContext and ItemsSource?
DataContext does not generate template, it only used to hold common data for other controls to bind. In terms of ItemsSource property, it is mainly used to generate template regardless of you set it in XAML or in the code behind. DataContext is mainly used to hold common data that other child want to share.
What is DataContext in XAML?
The XAML in WPF is just a pretty user interface to display and interact with the actual data, otherwise known as the DataContext . The purpose of other binding sources ( RelativeSource , ElementName , etc) is to point to another property that doesn’t exist in the current control’s DataContext.
What is ItemsSource in wpf?
ItemsSource can be data bound to any sequence that implements the IEnumerable interface, although the type of collection used does determine the way in which the control is updated when items are added to or removed. When ItemsSource is set, the Items property cannot be used to control the displayed values.
What is DataContext in C# WPF?
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. It’s defined on the FrameworkElement class, which most UI controls, including the WPF Window, inherits from.
What is DataContext in Linq?
Remarks. The DataContext is the source of all entities mapped over a database connection. It tracks changes that you made to all retrieved entities and maintains an “identity cache” that guarantees that entities retrieved more than one time are represented by using the same object instance.
What is DataTemplate WPF?
DataTemplate is about the presentation of data and is one of the many features provided by the WPF styling and templating model. For an introduction of the WPF styling and templating model, such as how to use a Style to set properties on controls, see the Styling and Templating topic.
How do I bind XAML to ViewModel?
Binding DataContext within XAML
- Add namespace of LoginViewModel to LoginVIew. xaml. xmlns:local=”clr-namespace:WPF_DataContext.VIewModel”
- Use UserControl’s DataContext property to assign ViewModel. That’s all.
What is LINQ SQL in C#?
LINQ to SQL offers an infrastructure (run-time) for the management of relational data as objects. It is a component of version 3.5 of the . NET Framework and ably does the translation of language-integrated queries of the object model into SQL. These queries are then sent to the database for the purpose of execution.
What is data context?
Data context is the network of connections among data points. Those connections may be created as metadata or simply identified and correlated. Contextual metadata adds value, essentially making it possible to receive information from data. A single data point on its own is useless.
What is difference between a ControlTemplate and a DataTemplate in WPF?
A ControlTemplate will generally only contain TemplateBinding expressions, binding back to the properties on the control itself, while a DataTemplate will contain standard Binding expressions, binding to the properties of its DataContext (the business/domain object or view model).