WPF实战学习笔记29-登录数据绑定，编写登录服务

添加登录绑定字段、命令、方法

修改对象：Mytodo.ViewModels.ViewModels

using Mytodo.Service;
using Prism.Commands;
using Prism.Events;
using Prism.Mvvm;
using Prism.Services.Dialogs;
using System;
using System.CodeDom.Compiler;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Shapes;namespace Mytodo.ViewModels
{public class LoginViewModel : BindableBase, IDialogAware{#region 定义命令/// <summary>/// 执行登录|推出等相关命令/// </summary>public DelegateCommand<string> ExecuteCommand { get; set; }#endregion#region 定义属性public string Password{get { return password; }set { password = value; }}public string Account{get { return account; }set { account = value; }}#endregion#region 定义重要字段#endregion#region 定义普通字段private string password;private string account;private readonly ILoginService loginService;private readonly IEventAggregator aggregator;#endregion#region 命令方法/// <summary>/// ExecuteCommand对应的方法/// </summary>/// <param name="obj"></param>private void Execute(string obj){switch (obj){case "Login": Login(); break;case "LoginOut": LoginOut(); break;//case "Resgiter": Resgiter(); break;//case "ResgiterPage": SelectIndex = 1; break;//case "Return": SelectIndex = 0; break;}}private void LoginOut(){//if (string.IsNullOrWhiteSpace(UserName) ||//   string.IsNullOrWhiteSpace(PassWord))//{//    return;//}//var loginResult = await LoginService.Login(new Shared.Dtos.UserDto()//{//    Account = UserName,//    PassWord = PassWord//});//if (loginResult != null && loginResult.Status)//{//    RequestClose?.Invoke(new DialogResult(ButtonResult.OK));//}//else//{//    //登录失败提示...//    aggregator.SendMessage(loginResult.Message, "Login");//}}private void Login(){//throw new NotImplementedException();}#endregion#region 启动项#endregion#region 继承public string Title { get; set; } = "Todo";public event Action<IDialogResult> RequestClose;public bool CanCloseDialog(){return true;}public void OnDialogClosed(){LoginOut();}public void OnDialogOpened(IDialogParameters parameters){}#endregionpublic LoginViewModel(ILoginService loginService, IEventAggregator aggregator){ExecuteCommand = new DelegateCommand<string> (Execute);this.loginService = loginService;this.aggregator = aggregator;}}
}

添加密码依赖对象行为

添加文件：Mytodo.Extensions.PassWordExtensions

using Microsoft.Xaml.Behaviors;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;namespace Mytodo.Extensions
{public class PassWordExtensions{public static string GetPassWord(DependencyObject obj){return (string)obj.GetValue(PassWordProperty);}public static void SetPassWord(DependencyObject obj, string value){obj.SetValue(PassWordProperty, value);}// Using a DependencyProperty as the backing store for PassWord.  This enables animation, styling, binding, etc...public static readonly DependencyProperty PassWordProperty =DependencyProperty.RegisterAttached("PassWord", typeof(string), typeof(PassWordExtensions), new FrameworkPropertyMetadata(string.Empty, OnPassWordPropertyChanged));private static void OnPassWordPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e){var passWord = d as PasswordBox;string password = (string)e.NewValue;if (passWord != null && passWord.Password != password)passWord.Password = password;}}public class PasswordBehavior : Behavior<PasswordBox>{protected override void OnAttached(){base.OnAttached();AssociatedObject.PasswordChanged += AssociatedObject_PasswordChanged;}private void AssociatedObject_PasswordChanged(object sender, RoutedEventArgs e){PasswordBox passwordBox = sender as PasswordBox;string password = PassWordExtensions.GetPassWord(passwordBox);if (passwordBox != null && passwordBox.Password != password)PassWordExtensions.SetPassWord(passwordBox, passwordBox.Password);}protected override void OnDetaching(){base.OnDetaching();AssociatedObject.PasswordChanged -= AssociatedObject_PasswordChanged;}}
}

###　登录UI添加密码行为

修改文件：Mytodo.Views.LoginView．ｘｍａｌ

1. 添加命名空间,略
2. 修改passbox。

<PasswordBoxMargin="0,10"md:HintAssist.Hint="请输入密码"pass:PassWordExtensions.PassWord="{Binding Password, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"DockPanel.Dock="Top"><i:Interaction.Behaviors><pass:PasswordBehavior /></i:Interaction.Behaviors>
</PasswordBox>

添加加密方法，并使用

添加文件：MyToDo.Share.StringExtensions.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Security.Cryptography;
using System.Text;
using System.Threading.Tasks;namespace MyToDo.Share
{public static class StringExtensions{public static string GetMD5(this string data){if (string.IsNullOrWhiteSpace(data))throw new ArgumentNullException(nameof(data));var hash = MD5.Create().ComputeHash(Encoding.Default.GetBytes(data));return Convert.ToBase64String(hash);//将加密后的字节数组转换为加密字符串}}
}

客户端添加登录和注册接口

添加文件：Mytodo.Service.cs

using MyToDo.Share.Models;
using MyToDo.Share;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;namespace Mytodo.Service
{public interface ILoginService{Task<ApiResponse> Login(UserDto user);Task<ApiResponse> Resgiter(UserDto user);}
}

添加文件：Mytodo.Service.LoginService

using MyToDo.Share;
using MyToDo.Share.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;namespace Mytodo.Service
{public class LoginService : ILoginService{private readonly HttpRestClient client;private readonly string serviceName = "Login";public LoginService(HttpRestClient client){this.client = client;}public async Task<ApiResponse> Login(UserDto user){BaseRequest request = new BaseRequest();request.Method = RestSharp.Method.POST;request.Route = $"api/{serviceName}/Login";request.Parameter = user;return await client.ExecuteAsync(request);}public async Task<ApiResponse> Resgiter(UserDto user){BaseRequest request = new BaseRequest();request.Method = RestSharp.Method.POST;request.Route = $"api/{serviceName}/Resgiter";request.Parameter = user;return await client.ExecuteAsync(request);}}
}

注册接口和服务

Mytodo.app.xaml.cs 添加内容containerRegistry.Register<ILoginService, LoginService>();