Bind column values to dropdownlist

cmd.CommandText = " Select * From GetUsersID";         cmd.Connection = conn;         conn.Open();         DataTable dt  = new DataTable();           dt.Load(cmd.ExecuteReader());         conn.Close();           DropDownList1.DataSource = dt;         DropDownList1.DataTextField = "Name";         DropDownList1.DataValueField = "ID";         DropDownList1.DataBind();