C# 添加登录视图

我想在我的WPF应用程序中添加一个登录视图。在应用程序中，我有一个主窗口，用于保存/控制我的用户控件之间的流

我将登录用户控件添加到应用程序中，并在我的主窗口中显示此流：

public partial class MainWindow : Window, INotifyPropertyChanged{
private async void Window_Loaded(object sender, RoutedEventArgs e)
        {
            Thread.CurrentThread.CurrentUICulture = Thread.CurrentThread.CurrentCulture;
            SINSessionViewModel vm = null;
                vm = new SINSessionViewModel(dialogProvider, authenticatedClient);
                vm.CreateSession.Execute(SessionPurpose.Clinic);

            ViewModel = vm;
            ViewModel_LifecycleChanged(vm, EventArgs.Empty);
        }
private Dictionary<SessionLifecycle, Func<SINSessionViewModel, Control>> LifecycleViews = new Dictionary<SessionLifecycle, Func<SINSessionViewModel, Control>>()
        {
            { SessionLifecycle.Login, vm => {
                Control c = new LoginView(vm.Lifecycle);
                c.DataContext = vm;
                return c;
            } },
            { SessionLifecycle.Setup, vm => {
                Control c = new ClinicSINSessionView();
                c.DataContext = vm;
                return c;
            } },
            { SessionLifecycle.Testing, vm => new SINListView() { DataContext = vm.CurrentListViewModel } },
            {
                SessionLifecycle.Finished, vm => {
                    vm.ExportAsCsvAsync();
                    Logger.Singleton.SessionComplete();
                    return new SessionResultView() { DataContext = vm };
                }
            }
        };
}

class SINSessionViewModel{
public SessionLifecycle Lifecycle
        {
            get { return _lifecycle; }
            private set
            {
                _lifecycle = value;
                if (LifecycleChanged != null) { LifecycleChanged(this, EventArgs.Empty); }
            }
        }
//some other actions which can change the value of Lifecycle
}

void ViewModel_LifecycleChanged(object sender, EventArgs e)
        {
            var requestedView = LifecycleViews[ViewModel.Lifecycle](ViewModel);
            MainView.Content = requestedView;
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(IsInSession)));
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(CanRecoverSession)));
        }

public分部类主窗口：窗口，INotifyPropertyChanged{
已加载专用异步无效窗口（对象发送方，RoutedEventArgs e）
{
Thread.CurrentThread.CurrentUICulture=Thread.CurrentThread.CurrentCulture；
SINSessionViewModel vm=null；
vm=新的SINSessionViewModel（dialogProvider、authenticatedClient）；
CreateSession.Execute（SessionPurpose.Clinic）；
ViewModel=vm；
ViewModel\u LifecycleChanged（vm，EventArgs.Empty）；
}
private Dictionary LifecycleViews=新字典（）
{
{SessionLifecycle.Login，vm=>{
控制c=新登录视图（vm.Lifecycle）；
c、 DataContext=vm；
返回c；
} },
{SessionLifecycle.Setup，vm=>{
控件c=新的ClinicSINSessionView（）；
c、 DataContext=vm；
返回c；
} },
{SessionLifecycle.Testing，vm=>new SINListView（）{DataContext=vm.CurrentListViewModel}，
{
SessionLifecycle.Finished，vm=>{
ExportAsCsvAsync（）；
Logger.Singleton.SessionComplete（）；
返回新的SessionResultView（）{DataContext=vm}；
}
}
};
}
类SINSessionViewModel{
公共会话生命周期
{
获取{return\u lifecycle；}
专用设备
{
_生命周期=价值；
if（LifecycleChanged！=null）{LifecycleChanged（this，EventArgs.Empty）；}
}
}
//其他一些可以改变生命周期价值的操作
}

因此，我需要为authenticatedClient LoginView设置一个适当的值，并将SessionLifecycle更改为SessionLifecycle.Setup以启动应用程序。如果有人能帮助我如何在MainWindow、LoginView和SINSessionViewModel之间传递参数，我将不胜感激。

因此我找到了解决方案： 首先，由于主窗口包含LoginView，LoginView可以访问SINSessionViewModel，因此我需要做的是对上述代码进行如下更改：

private async void Window_Loaded(object sender, RoutedEventArgs e)
        {
            Thread.CurrentThread.CurrentUICulture = Thread.CurrentThread.CurrentCulture;

            SINSessionViewModel vm = null;
            vm = new SINSessionViewModel(dialogProvider);
            vm.CreateSession.Execute(SessionPurpose.Clinic);

            ViewModel = vm;
            ViewModel_LifecycleChanged(vm, EventArgs.Empty);
        }

private Dictionary<SessionLifecycle, Func<SINSessionViewModel, Control>> LifecycleViews = new Dictionary<SessionLifecycle, Func<SINSessionViewModel, Control>>()
        {
            { SessionLifecycle.Login, vm => {
                Control c = new LoginView();
                c.DataContext = vm;
                return c;
            } },
            { SessionLifecycle.Setup, vm => {
                Control c = new ClinicSINSessionView();
                c.DataContext = vm;
                return c;
            } },
            { SessionLifecycle.Testing, vm => new SINListView() { DataContext = vm.CurrentListViewModel } },
            {
                SessionLifecycle.Finished, vm => {
                    vm.ExportAsCsvAsync();
                    Logger.Singleton.SessionComplete();
                    return new SessionResultView() { DataContext = vm };
                }
            }
        };

在主窗口中：

public partial class MainWindow : Window, INotifyPropertyChanged{
private async void Window_Loaded(object sender, RoutedEventArgs e)
        {
            Thread.CurrentThread.CurrentUICulture = Thread.CurrentThread.CurrentCulture;
            SINSessionViewModel vm = null;
                vm = new SINSessionViewModel(dialogProvider, authenticatedClient);
                vm.CreateSession.Execute(SessionPurpose.Clinic);

            ViewModel = vm;
            ViewModel_LifecycleChanged(vm, EventArgs.Empty);
        }
private Dictionary<SessionLifecycle, Func<SINSessionViewModel, Control>> LifecycleViews = new Dictionary<SessionLifecycle, Func<SINSessionViewModel, Control>>()
        {
            { SessionLifecycle.Login, vm => {
                Control c = new LoginView(vm.Lifecycle);
                c.DataContext = vm;
                return c;
            } },
            { SessionLifecycle.Setup, vm => {
                Control c = new ClinicSINSessionView();
                c.DataContext = vm;
                return c;
            } },
            { SessionLifecycle.Testing, vm => new SINListView() { DataContext = vm.CurrentListViewModel } },
            {
                SessionLifecycle.Finished, vm => {
                    vm.ExportAsCsvAsync();
                    Logger.Singleton.SessionComplete();
                    return new SessionResultView() { DataContext = vm };
                }
            }
        };
}

class SINSessionViewModel{
public SessionLifecycle Lifecycle
        {
            get { return _lifecycle; }
            private set
            {
                _lifecycle = value;
                if (LifecycleChanged != null) { LifecycleChanged(this, EventArgs.Empty); }
            }
        }
//some other actions which can change the value of Lifecycle
}

void ViewModel_LifecycleChanged(object sender, EventArgs e)
        {
            var requestedView = LifecycleViews[ViewModel.Lifecycle](ViewModel);
            MainView.Content = requestedView;
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(IsInSession)));
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(CanRecoverSession)));
        }

它读取包含视图的字典并加载它们