public NewAuthorViewModel()
{
async void execute(string value)
{
try
{
author.Name = value;
await Constants.BaseServiceUrl.AppendPathSegment(typeof(Author).Name).PostJsonAsync(author);
AuthorAdded?.Invoke(this, author);
}
// Se webservice retornar erro, lança uma FlurlHttpException
catch (FlurlHttpException ex)
{
// Nesse caso, pega o corpo da resposta de erro e
// desserializa como um DTO ErrorResponse
var error = await ex.GetResponseJsonAsync <ErrorResponse>();
// Invoca evento de requisição zoada.
RequestFailed?.Invoke(this, error);
}
}
// Atribui valor ao comando.
PostCommand = new Command <string>(execute);
}
private void Save_Executed(object sender, ExecutedRoutedEventArgs e)
{
if (!ApplicationDbContext.Instance.Authors.Any(a =>
a.FirstName.ToLower() == AuthorFirstNameTextBox.Text.ToLower() &&
a.LastName.ToLower() == AuthorLastNameTextBox.Text.ToLower()))
{
var author = new Author {
FirstName = AuthorFirstNameTextBox.Text, LastName = AuthorLastNameTextBox.Text, Id = Guid.NewGuid()
};
ApplicationDbContext.Instance.Entry(author).State = EntityState.Added;
ApplicationDbContext.Instance.SaveChanges();
AuthorAdded?.Invoke(this, new EntityEventArgs <Author> {
Entity = author
});
this.Close();
}
else
{
AuthorExistsTextBlock.Visibility = Visibility.Visible;
}
}
void IChatServiceCallback.AuthorAdded(long userId, long roomId, long?addedBy)
{
_eventDispatcher.Add(() => AuthorAdded.SafeInvoke(GetUser(userId), GetRoom(roomId), addedBy == null ? null : GetUser((long)addedBy)));
}
