private void buttonAdd_Click(object sender, EventArgs e)
{
// Add a new Order in a child transaction scope.
// Rolling back the child transaction will not roll back the parent transaction.
using (var tran2 = new ClientTransaction(_transaction))
{
var order = new Order();
using (tran2.Scope())
{
_cache.ObjectContext.AddObject("Orders", order);
}
var window = new OrderForm(order, tran2);
if (window.ShowDialog() == DialogResult.OK)
{
// Add the order to the Customer.Orders in the child transaction scope and commit the transaction.
using (tran2.Scope())
{
Customer.Orders.Add(order);
tran2.Commit();
}
}
} // The child transaction will be rolled back automatically if it is not committed.
}
public MainWindow()
{
InitializeComponent();
// Initialize the default client cache and open the global transaction scope,
// so all changes in the application are made in a transaction.
_cache = C1.Data.Entities.EntityClientCache.GetDefault(typeof(NORTHWNDEntities));
_transaction = _cache.CreateTransaction();
_transactionScope = _transaction.Scope();
}
void CancelAllChanges(object sender, RoutedEventArgs e)
{
// Cancel all changes made in this application by rolling back the global transaction.
if (_transaction.State == TransactionState.Open)
{
_transaction.Rollback();
_transactionScope.Dispose();
}
// Open a new transaction.
_transaction = _cache.CreateTransaction();
_transactionScope = _transaction.Scope();
}
private void deleteOrder(object sender, RoutedEventArgs e)
{
// Remove the selected order.
var order = ordersGrid.SelectedItem as OrderInfo;
if (order == null)
{
return;
}
using (_transaction.Scope())
{
// Make the change in the transaction scope.
Customer.Orders.Remove(order.GetOrder());
}
}
private void buttonDelete_Click(object sender, EventArgs e)
{
// Remove the selected order.
var row = BindingContext[_ordersView].Current as C1.LiveLinq.LiveViews.ViewRow;
if (row == null)
{
return;
}
var order = ((OrderInfo)row.Value).GetOrder();
using (_transaction.Scope())
{
// Make the change in the transaction scope.
Customer.Orders.Remove(order);
}
}
private void addOrder(object sender, RoutedEventArgs e)
{
// Add a new Order in a child transaction scope.
// Rolling back the child transaction will not roll back the parent transaction.
using (var tran2 = new ClientTransaction(_transaction)) // Create a child transaction.
{
var order = new Order();
var window = new OrderWindow(order, tran2);
if (window.ShowDialog() == true)
{
// Add the order in the child transaction scope and commit the transaction.
using (tran2.Scope())
{
Customer.Orders.Add(order);
tran2.Commit();
}
}
} // The child transaction will be rolled back automatically if it is not committed.
}
