How to insert data into SQL Server

Question

What the problem on my coding? I cannot insert data to ms sql.. I\'m using C# as front end and MS SQL as databases...

name = tbName.Text;
userId = tbStaffId.         


        

Answer 1

string saveStaff = "INSERT into student (stud_id,stud_name) " + " VALUES ('" + SI+ "', '" + SN + "');";
cmd = new SqlCommand(saveStaff,con);
cmd.ExecuteNonQuery();