code for save button

SqlConnection con = new SqlConnection("Data Source=.\\SQLEXPRESS;Initial Catalog=Your Database Name;Integrated Security=True");
           con.Open();
           SqlCommand command= new  SqlCommand();
           command.Connection = con;
           command.CommandType = CommandType.Text;
           command.CommandText = "your query here"


           try
           {
               command.ExecuteNonQuery();
               con.Close();


           }

           catch (Exception e)
           {

           }