HOLA! lo unico que hago es :
 
protected void GridView2_RowDeleting(object sender, GridViewDeleteEventArgs e)
    {
        GridView2.SelectedIndex = e.RowIndex;
        string cod = GridView2.Rows[e.RowIndex].Cells[2].Text.Trim();
        rec.DeleteObjeto(cod);
        GridView2.DeleteRow(e.RowIndex);
 
    }
 
porque me da ese error??alguna idea?? 
  
 
 
