public void ReturnBook()
{
try
{//show a loading message
View.ShowLoading();
using (IServiceClientProxy proxy = new IServiceClientProxy(binding, new ProtocolVersion11()))
{
//execute the return request
int bookId = LibraryModelSingleton.Instance.Book.ID;
int userId = LibraryModelSingleton.Instance.User.ID;
GiveBackBook returnRequest = new GiveBackBook() { bookID = bookId, userID = userId };
var response = proxy.GiveBackBook(returnRequest);
//show positive a message if the result is valid otherwise a negative message
//and return in the welcome page
state = InnerState.WELCOME;
string msg = (response.GiveBackBookResult) ? OPERATION_COMPLETED_MSG : OPERATION_FAILED_MSG;
View.ShowMessageWithButton(msg, () => { View.ShowWelcomePage(); });
}
}
//show a message and then returns in the login page
catch (Exception) { View.ShowMessageWithButton(ERROR_MSG, () => { this.Logout(); }); }
}
