添加登录界面UI

添加文件loginview.xaml。注意本界面使用的是md内的图标。没有登录界面的图片

<UserControlx:Class="Mytodo.Views.LoginView"xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"xmlns:d="http://schemas.microsoft.com/expression/blend/2008"xmlns:i="http://schemas.microsoft.com/xaml/behaviors"xmlns:local="clr-namespace:Mytodo.Views"xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"xmlns:md="http://materialdesigninxaml.net/winfx/xaml/themes"xmlns:prism="http://prismlibrary.com/"mc:Ignorable="d"><prism:Dialog.WindowStyle><Style TargetType="Window"><Setter Property="Width" Value="600" /><Setter Property="Height" Value="400" /><Setter Property="SizeToContent" Value="WidthAndHeight" /><Setter Property="ResizeMode" Value="NoResize" /><Setter Property="prism:Dialog.WindowStartupLocation" Value="CenterScreen" /></Style></prism:Dialog.WindowStyle><Grid Width="350" Height="400"><DockPanel Margin="15,5,15,20" VerticalAlignment="Center"><md:PackIconWidth="100"Height="80"HorizontalAlignment="Center"VerticalAlignment="Center"md:ThemeAssist.Theme="Dark"DockPanel.Dock="Top"Foreground="SpringGreen"Kind="AccountOutline" /><TextBlockMargin="0,10"DockPanel.Dock="Top"FontSize="22"FontWeight="Bold"Text="欢迎使用" /><TextBoxMargin="0,10"md:HintAssist.Hint="请输入账号"DockPanel.Dock="Top"Text="{Binding UserName}" /><PasswordBoxMargin="0,10"md:HintAssist.Hint="请输入密码"DockPanel.Dock="Top"><!--  pass:PassWordExtensions.PassWord="{Binding PassWord, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"  --><!--<i:Interaction.Behaviors><pass:PasswordBehavior /></i:Interaction.Behaviors>--></PasswordBox><ButtonCommand="{Binding ExecuteCommand}"CommandParameter="Login"Content="登录系统"DockPanel.Dock="Top" /><DockPanel Margin="0,5" LastChildFill="False"><TextBlock Text="注册账号"><i:Interaction.Triggers><i:EventTrigger EventName="MouseLeftButtonDown"><i:InvokeCommandAction Command="{Binding ExecuteCommand}" CommandParameter="ResgiterPage" /></i:EventTrigger></i:Interaction.Triggers></TextBlock><TextBlock DockPanel.Dock="Right" Text="忘记密码?" /></DockPanel></DockPanel></Grid>
</UserControl>

添加对应的viewmodel

添加文件Mytodo.ViewModels.LoginViewModel.cs

using Prism.Mvvm;
using Prism.Services.Dialogs;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;namespace Mytodo.ViewModels
{public class LoginViewModel : BindableBase, IDialogAware{public string Title { get; set; } = "TOdo";public event Action<IDialogResult> RequestClose;public bool CanCloseDialog(){return true;}public void OnDialogClosed(){}public void OnDialogOpened(IDialogParameters parameters){}}
}

注册视图

containerRegistry.RegisterForNavigation<LoginView, LoginViewModel>();

添加启动

修改文件：App.xmal.cs

protected override void OnInitialized()
{var dialog = Container.Resolve<IDialogService>();dialog.ShowDialog("LoginView", callback =>{if (callback.Result != ButtonResult.OK){Environment.Exit(0);return;}var service = App.Current.MainWindow.DataContext as IConfigureInterface;if (service != null){service.Configure();}base.OnInitialized();});
}