Insert into sql with - char

Hey

 

I couldn't understand your question properly, are you looking the solution like this 

 

cmd.Parameters.Add("@iznos_sa_pdv", SqlDbType.VarChar, 255).Value = "-" + ukupnolabel.Text;  

 

OR

If your value is numeric type then I strongly recommend you to change the datatype to int/decimal, it will be well suited todo arithimetic operations