private void customerIDComboBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
Customer selectedCustomer =
this.customerIDComboBox.SelectedItem as Customer;
try
{
// Load the first page of related orders for the selected customer.
context.LoadProperty(selectedCustomer, "Orders");
// Load all remaining pages.
while (selectedCustomer.Orders.Continuation != null)
{
selectedCustomer.Orders.Load(
context.Execute <Order>(selectedCustomer.Orders.Continuation.NextLinkUri));
}
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
}
}
private void Window_Loaded(object sender, RoutedEventArgs e)
{
// Instantiate the data service context.
context = new NorthwindEntities(svcUri);
try
{
// Create a new collection for binding based on the LINQ query.
trackedEmployees = new DataServiceCollection <Employees>(context.Employees);
// Load all pages of the response at once.
while (trackedEmployees.Continuation != null)
{
trackedEmployees.Load(
context.Execute <Employees>(trackedEmployees.Continuation.NextLinkUri));
}
// Bind the root StackPanel element to the collection;
// related object binding paths are defined in the XAML.
LayoutRoot.DataContext = trackedEmployees;
if (trackedEmployees.Count == 0)
{
MessageBox.Show("Data could not be returned from the data service.");
}
// Select the first employee in the collection.
employeesComboBox.SelectedIndex = 0;
}
catch (DataServiceQueryException ex)
{
MessageBox.Show(ex.Message);
}
catch (InvalidOperationException ex)
{
MessageBox.Show(ex.Message);
}
}
private void Window_Loaded(object sender, RoutedEventArgs e)
{
try
{
// Initialize the context for the data service.
context = new NorthwindEntities(new Uri(svcUri));
// Create a LINQ query that returns customers with related orders.
var customerQuery = from cust in context.Customers
where cust.Country == customerCountry
select cust;
//<snippetBindPagedDataSpecific>
// Create a new collection for binding based on the LINQ query.
trackedCustomers = new DataServiceCollection <Customer>(customerQuery);
// Load all pages of the response at once.
while (trackedCustomers.Continuation != null)
{
trackedCustomers.Load(
context.Execute <Customer>(trackedCustomers.Continuation.NextLinkUri));
}
//</snippetBindPagedDataSpecific>
// Bind the root StackPanel element to the collection;
// related object binding paths are defined in the XAML.
LayoutRoot.DataContext = trackedCustomers;
}
catch (DataServiceQueryException ex)
{
MessageBox.Show("The query could not be completed:\n" + ex.ToString());
}
catch (InvalidOperationException ex)
{
MessageBox.Show("The following error occurred:\n" + ex.ToString());
}
}
private void ClientCredentials_Loaded(object sender, RoutedEventArgs e)
{
string userName = string.Empty;
string domain = string.Empty;
SecureString password = new SecureString();
// Get credentials for authentication.
LoginWindow login = new LoginWindow();
login.ShowDialog();
if (login.DialogResult == true &&
login.userNameBox.Text != string.Empty &&
login.passwordBox.SecurePassword.Length != 0)
{
// Instantiate the context.
context =
new NorthwindEntities(serviceUri);
// Get the user name and domain from the login.
string[] qualifiedUserName = login.userNameBox.Text.Split(new char[] { '\\' });
if (qualifiedUserName.Length == 2)
{
domain = qualifiedUserName[0];
userName = qualifiedUserName[1];
}
else
{
userName = login.userNameBox.Text;
}
password = login.passwordBox.SecurePassword;
// Set the client authentication credentials.
context.Credentials =
new NetworkCredential(userName, password, domain);
// Define an anonymous LINQ query that returns a collection of Customer types.
var query = from c in context.Customers
where c.Country == "Germany"
select c;
try
{
// Instantiate the binding collection, which executes the query.
binding = new DataServiceCollection <Customer>(query);
while (binding.Continuation != null)
{
// Continue to execute the query until all pages are loaded.
binding.Load(context.Execute <Customer>(binding.Continuation.NextLinkUri));
}
// Assign the binding collection to the CollectionViewSource.
customerAddressViewSource =
(CollectionViewSource)this.Resources["customerViewSource"];
customerAddressViewSource.Source = binding;
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
else if (login.DialogResult == false)
{
MessageBox.Show("Login cancelled.");
}
}
