Error query Sql Server insert, not correct value format C# -

i have problem inserting data sql server 2012.
problem when save quantitaand prezzothe values changed! can be?. quantita , prezzo money values taken datagridview leave under example image of datagridview used insertion , result of insertion database.

value within datagridview:

after insert sql-server:

 sqlconnection conn = db.apriconnessione();             sqltransaction sqltran = conn.begintransaction();             try             {                 //avvio la transazione                  sqlcommand command = conn.createcommand();                 command.transaction = sqltran;                  //inserimentobolla                 datetime dataconvertita = convert.todatetime(labeldataddtmod.text);                 command.commandtext = "set identity_insert bolla on";                 command.executenonquery();                 command.commandtext = "insert bolla(numeroddt,idcantiere,dataddt,agente,ragionesociale,codicecliente,riferimentiinterni,importo,destinazione,filiale,magazzino,preparato,vettore,tipotrasporto) values('" + labelnumddtmod.text+"','"+idcantiere+"',convert(datetime,'"+dataconvertita+"', 103),'" + labelagentemod.text+"','"+labelragionesocialemod.text+"','"+int.parse(labelcodiceclientemod.text)+"','"+labelrifinternomod.text+"','"+float.parse(labelimportomod.text)+"','"+labeldestmod.text+"','"+labelfilialemod.text+"','"+labelmagazzinomod.text+"','"+labelpreparatodamod.text+"','"+labelvettoremod.text+"','"+labeltipotrasportomod.text+"')";                 command.executenonquery();                 command.commandtext = "set identity_insert bolla off";                 command.executenonquery();                 //fine bolla                  //inserimento articolo                  (int rows = 0; rows < datagridviewarticoli.rows.count; rows++)                 {                          string fornitore = datagridviewarticoli.rows[rows].cells[0].value.tostring();                          string modellofornitore = datagridviewarticoli.rows[rows].cells[1].value.tostring();                          string siglametel = datagridviewarticoli.rows[rows].cells[2].value.tostring();                          string codicemetel = datagridviewarticoli.rows[rows].cells[3].value.tostring();                          string codiceinterno = datagridviewarticoli.rows[rows].cells[4].value.tostring();                          string descrizione = datagridviewarticoli.rows[rows].cells[5].value.tostring();                          float prezzo = float.parse(datagridviewarticoli.rows[rows].cells[6].value.tostring());                        // messagebox.show(" "+prezzo);                         float quantita = float.parse(datagridviewarticoli.rows[rows].cells[8].value.tostring());                     // messagebox.show("quantita: "+quantita);                         command.commandtext = "insert articolocantiere(idcantiere,idutente,codart,codmarca,codiceinterno,modellofornitore,prezzo,quantita,fornitore,importato) values('" + idcantiere + "','"+u.idutente+"','" + codicemetel + "','" + siglametel + "','" + codiceinterno + "','" + modellofornitore + "','" + prezzo + "','" + quantita + "','comet','bolla')";                         command.executenonquery();                  }                 //fine inserimento articolo                  //conferma delle transazioni con la commit                 sqltran.commit();               }              catch (exception ex)             {                 sqltran.rollback();                 messagebox.show("errore nell'inserimento "+ex);             }              conn.close();              this.dialogresult = dialogresult.ok;             this.close(); 

you insert string values ',' separator money data type, , problem.

first of all, in sql server decimal separator '.', not ','.

second, should not pass numbers strings

here code reproduce problem:

declare @t table(col money) insert @t values ('1,44');  select * @t; ----------   -- 144,00 

money data type accepts input ',' separator, treats not decimal separator thousand separator.

so resolve it, best way pass in numbers numbers, worst thing can replace ',' '.' before insert:

declare @t table(col money) insert @t values (replace ('1,44', ',', '.'));  select * @t; ----- ---1,44