求教该sql语句有何错误,为何总是跳到异常

Question

sql="insert into[User](UserId,Login,Password,FirstName,LastName,PhoneNumber,Email,IsAdministrator,Address,CellNumber,DateOfBirth,) values('"+str+"','"+txtlogin+"','"+txtpwd+"','"+txtfname+"','"+txtlname+"','"+txtphone+"','"+txtemail+"','"+x+"','"+txtaddress+"','"+txtmobile+"','"+txtbirth+"')";---> sql="insert into [User](UserId,Login,Password,FirstName,LastName,PhoneNumber,Email,IsAdministrator,Address,CellNumber,DateOfBirth,) values('"+str+"','"+txtlogin+"','"+txtpwd+"','"+txtfname+"','"+txtlname+"','"+txtphone+"','"+txtemail+"','"+x+"','"+txtaddress+"','"+txtmobile+"','"+txtbirth+"')";第一行加空格