WPF连接SQLServer数据库并判断永明和密码时都存在，若存在则跳转到下一个页面，否则弹出对话框，以下是我的代码，为什么不管用户名和密码对不对页面都会直接跳

--------------------编程问答-------------------- 错误已经找到，并改正了要将 while (reader.Read())
                    {
                        if (UserName == reader.GetString(0) || PassWord != reader.GetString(1))
                        {
                            this.ShowsNavigationUI = true;
                            this.NavigationService.Navigate(new Uri("ExpertMain.xaml", UriKind.Relative));
                        }
                        else
                        {
                            this.ShowsNavigationUI = false;
                            System.Windows.MessageBox.Show("用户名或者用户密码错误！");
                        }
                    }
改为 while (reader.Read())
                    {
                        if (UserName == reader.GetString(0) && PassWord == reader.GetString(1))
                        {
                            this.NavigationService.Navigate(new Uri("ExpertMain.xaml", UriKind.Relative));
                            return;
                        }
                        else
                        {
                            System.Windows.MessageBox.Show("用户名或者用户密码错误！");
                            return;
                        }
                    }
都是粗心大意惹得祸！！！

补充：移动开发 ,  移动开发其他问题