/// <summary>
/// Creates a new item to be edited.
/// </summary>
/// <returns>The newly created item.</returns>
public void AddItem()
{
// a new row may be requested before any data source is specified
if (this.ItemType == null)
{
return;
}
NewItemEventArgs newItemEventArgs = new NewItemEventArgs();
this.SendNotification(Notifications.NewItemCustom, newItemEventArgs);
object newItem = newItemEventArgs.NewItem ??
(from constructor in this.ItemType.GetConstructors(BindingFlags.Public | BindingFlags.Instance)
where constructor.GetParameters().Length == 0
select constructor.Invoke(null)).FirstOrDefault();
if (newItem == null)
{
const string error = "A new item cannot be created because the type of {0} " +
"does not have a parameterless constructor.";
throw new MissingMemberException(string.Format(error, this.ItemType.FullName));
}
// not checking of the underlying source can be added to because there may be no source at at all yet
this.SendNotification(Notifications.NewItemAdded, newItem);
this.Data = newItem;
}
/// <summary>
/// Raises the <see cref="NewItemAdding"/> event.
/// </summary>
/// <param name="e">The <see cref="NewItemEventArgs"/> instance containing the event data.</param>
public void OnNewItemAdding(NewItemEventArgs e)
{
EventHandler<NewItemEventArgs> handler = this.NewItemAdding;
if (handler != null)
{
handler(this, e);
}
}
