public void LoadMachines() { _MainClass helper = new _MainClass(); string query = "SELECT * from Machine_Code"; DataTable tbl = new DataTable(); tbl = helper.PkSelect(query, "NOYConnectionString"); List <int> ClearedId = new List <int>(); foreach (DataRow item in tbl.Rows) { foreach (Panel p in form1.Controls.OfType <Panel>()) { foreach (Label l in p.Controls.OfType <Label>()) { string tooltip = Convert.ToString(item[0]); string newID = Convert.ToString(item[1]); try { string dataAttr = l.Attributes["data-possition"].ToString(); if (dataAttr.Length <= 4) { if ((dataAttr).Equals(tooltip)) { l.Attributes.Add("data-machine", newID); } } } catch (Exception) { continue; } } } } }