private void ShowValues()
{
this.dataList.DataSource = BPresentation.ShowValues();
this.HideCollumns();
lblTotal.Text = Convert.ToString(dataList.Rows.Count) + " registers found";
}
private void CombPresentation()
{
cbPresentation.DataSource = BPresentation.ShowValues();
cbPresentation.ValueMember = "idpresentation";
cbPresentation.DisplayMember = "name";
}