private void repositoryItemButtonEdit1_Click(object sender, EventArgs e)
{
string id = gridView1.GetFocusedRowCellValue("ISBN").ToString();
GUI.Editar frmEditar = new GUI.Editar(this.Buscar("", id));
frmEditar.ShowDialog();
dgListado.DataSource = this.Listar();
}
private void btnNuevo_Click(object sender, EventArgs e)
{
GUI.Editar frmEditar = new GUI.Editar();
frmEditar.ShowDialog();
dgListado.DataSource = this.Listar();
}