1. Displaying and Editing Data by Using the Entity Framework and Data Binding
Fehim Korhan YAMAN

2. Entity Framework and Data Model
Entity Framework is a technology that is used for querying and manipulating databases.
Entity data model is a logical model of a database.
We use the entity framework to generate a logical data model.

3. Retrieving Information and Establishing the Data Bindings
using System.ComponentModel;
using System.Collections;
public partial class SupplierInfo : Window {
private NorthwindEntities northwindContext = null;
private Supplier supplier = null;
private IList productsInfo = null;
... }

4. Retrieving Information and Establishing the Data Bindings
private void Window_Loaded(object sender, RoutedEventArgs e) {
this.northwindContext = new NorthwindEntities();
suppliersList.DataContext = this.northwindContext.Suppliers; }
private void suppliersList_SelectionChanged(object sender,
SelectionChangedEventArgs e)
this.supplier = suppliersList.SelectedItem as Supplier;
this.northwindContext.LoadProperty<Supplier>(this.supplier, s => s.Products);
this.productsInfo = ((IListSource)supplier.Products).GetList();
productsList.DataContext = this.productsInfo;

5. Using LINQ to Entities to Query Data
NorthwindEntities northwindContext = new NorthwindEntities();
ObjectQuery<Product> products = northwindContext.Products;
var productNames = from p in products
select p.ProductName;
foreach (var name in productNames) {
Console.WriteLine("Product name: {0}", name); }

6. Using Data Binding for Data editing
NorthwindEntities northwindContext = new NorthwindEntities();
try {
Product product = northwindContext.Products.Single(p => p.ProductID == 14);
product.ProductName = "Bean Curd";
northwindContext.SaveChanges(); }
catch (OptimisticConcurrencyException ex)
northwindContext.Refresh(RefreshMode.ClientWins, northwindContext.Products);

7. QUESTIONS?

8. References
Microsoft Visual C# 2010 Step by Step