添加项目文件。

LoginModule/ViewModels/LoginViewModel.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Input;
+using UIShare.PubEvent;
+using UIShare.ViewModelBase;
+
+namespace LoginModule.ViewModels
+{
+    public class LoginViewModel: NavigateViewModelBase
+    {
+        #region 属性
+        private string _Password;
+        public string Password
+        {
+            get => _Password;
+            set => SetProperty(ref _Password, value);
+        }
+        private string _Account;
+        public string Account
+        {
+            get => _Account;
+            set => SetProperty(ref _Account, value);
+        }
+        #endregion
+        public ICommand LoginCommand { get; set; }
+        public ICommand RegisterCommand { get; set; }
+        private IEventAggregator _eventAggregator;
+        public LoginViewModel(IContainerProvider containerProvider) : base(containerProvider)
+        {
+            _eventAggregator = containerProvider.Resolve<IEventAggregator>();
+            LoginCommand = new AsyncDelegateCommand(OnLogin);
+            RegisterCommand = new AsyncDelegateCommand(OnRegister);
+        }
+
+        private async Task OnRegister()
+        {
+            _regionManager.RequestNavigate("LoginRegion", "RegisterView");
+        }
+
+        private async Task OnLogin()
+        {
+            _eventAggregator.GetEvent<LoginSuccessEvent>().Publish();
+        }
+    }
+}

LoginModule/ViewModels/RegisterViewModel.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Input;
+using UIShare.ViewModelBase;
+
+namespace LoginModule.ViewModels
+{
+    public class RegisterViewModel : NavigateViewModelBase
+    {
+        #region 属性
+        private string _SecondPassword;
+        public string SecondPassword
+        {
+            get => _SecondPassword;
+            set => SetProperty(ref _SecondPassword, value);
+        }
+        private string _Password;
+        public string Password
+        {
+            get => _Password;
+            set => SetProperty(ref _Password, value);
+        }
+        private string _Account;
+        public string Account
+        {
+            get => _Account;
+            set => SetProperty(ref _Account, value);
+        }
+        #endregion
+        public ICommand BackCommand { get; set; }
+        public ICommand RegisterCommand { get; set; }
+        public RegisterViewModel(IContainerProvider containerProvider) : base(containerProvider)
+        {
+            BackCommand = new DelegateCommand(OnBack);
+            RegisterCommand = new AsyncDelegateCommand(OnRegister);
+        }
+
+        private void OnBack()
+        {
+           _regionManager.RequestNavigate("LoginRegion", "LoginView");
+        }
+
+        private async Task OnRegister()
+        {
+            _regionManager.RequestNavigate("LoginRegion", "LoginView");
+        }
+    }
+}