Question

ASP.NET属性尚未初始化问题

string strcnn = ConfigurationManager.ConnectionStrings["sqllianjie"].ConnectionString;
SqlConnection cn = new SqlConnection(strcnn);
cn.Open();
SqlCommand cmd = new SqlCommand();
cmd.CommandType = CommandType.Text;
cmd.CommandText = "delete from class where class.班级编号 in (select class.班级编号 from xueyuan,xi,class where xueyuan.学院编号=xi.学院编号 and xi.系编号=class.系编号 and xueyuan.学院编号='" + d + "')";
cmd.ExecuteNonQuery();
cn.Close();

总是出现错误 异常详细信息: System.InvalidOperationException: ExecuteNonQuery: Connection 属性尚未初始化。
这是为什么，那位高手帮忙解决一下

Answer 1

cmd.Connection=cn;

Answer 2

cmd.Connection = cn;