C# 如何在C中使用SQLite、MVVM进行授权#

我有2个独立的项目，注册和登录主窗口，我绑定到同一个SQLite文件。 用户注册的一切都很好，但现在我需要的登录将正常工作。如何从BD中提取用户，并使用MVVM检查该用户是否存在以及密码是否一致

我开始创建两个类

public class ServiceResult
{
    public bool IsSucceed { get; set; }
    public string Error { get; set; }
    public ServiceResult()
    {
        IsSucceed = true;
    }

    public ServiceResult(string error)
    {
        IsSucceed = false;
        Error = error;
    }
}

及

我的注册视图模型

public class RegisterViewModel : BaseViewModel
{
    Hashing hashing = new Hashing();
    ApplicationDbContext db;
    private string name;
    public string Name
    {
        get => name;
        set
        {
            name = value;
            OnPropertyChanged(nameof(Name));
        }
    }
    private string lastName;
    public string LastName
    {
        get => lastName;
        set
        {
            lastName = value;
            OnPropertyChanged(nameof(LastName));
        }
    }
    private string login;
    public string Login
    {
        get => login;
        set
        {
            login = value;
            OnPropertyChanged(nameof(Login));
        }
    }

    private string password;
    public string Password
    {
        get { return password; }
        set
        {
            if (password != value)
            {
                password = value;
                OnPropertyChanged("Password");
            }
        }
    }
    private string mail;
    public string Mail
    {
        get => mail;
        set
        {
            mail = value;
            OnPropertyChanged(nameof(Mail));
        }
    }



    public ICommand Command { get; set; }

    private RelayCommand registerCommand;
    public RelayCommand RegisterCommand
    {
        get
        {
            return registerCommand ??
                (registerCommand = new RelayCommand(() =>
                {
                    var _user = new RegisterUser(Name, LastName, Login, hashing.Encrypt(Password), Mail);
                    db.Users.Add(_user);
                    db.SaveChanges();
                }));
        }
    }

    public ObservableCollection<User> Users { get; set; }
    public RegisterViewModel()
    {
        db = new ApplicationDbContext();
    }
}

 ApplicationDbContext db;
    IEnumerable<User> users;

    public LoginViewModel(IViewFactory viewFactory, ICore core) : base(viewFactory)
    {
        db = new ApplicationDbContext();
    }

    public ICommand Command { get; set; }

    private string login;
    public string Login
    {
        get => login;
        set
        {
            login = value;
            RaisePropertyChanged(nameof(Login));
        }
    }
    private string password;
    public string Password
    {
        get => password;
        set
        {
            password = value;
            RaisePropertyChanged(nameof(Password));
        }
    }

    private RelayCommand addCommand;
    public RelayCommand AddCommand
    {
        get
        {
            return addCommand ??
                (addCommand = new RelayCommand(() =>
                {
                }));
        }
    }

    public IEnumerable<User> Users
    {
        get { return users; }
        set
        {
            users = value;
            RaisePropertyChanged("Users");
        }
    }
}

private RelayCommand loginUser;
    public RelayCommand LoginUser
    {
        get
        {
            return loginUser ??
                (loginUser = new RelayCommand(() =>
                {
                    var result = _authorizationService.Login(Login, hashing.Encrypt(Password));
                }));
        }
    }

公共类RegisterViewModel:BaseViewModel { Hashing Hashing=新的Hashing（）； 应用程序上下文数据库； 私有字符串名称； 公共字符串名 { get=>name； 设置 { 名称=值； OnPropertyChanged（Name of（Name））； } } 私有字符串lastName； 公共字符串姓氏 { get=>lastName； 设置 { lastName=值； OnPropertyChanged（nameof（LastName））； } } 私有字符串登录； 公共字符串登录 { get=>login； 设置 { 登录=值； OnPropertyChanged（登录名）； } } 私有字符串密码； 公共字符串密码 { 获取{返回密码；} 设置 { 如果（密码！=值） { 密码=值； OnPropertyChanged（“密码”）； } } } 私人字符串邮件； 公用字符串邮件 { get=>邮件； 设置 { 邮件=价值； OnPropertyChanged（姓名（邮件））； } } 公共ICommand命令{get；set；} 专用中继通信注册通信； 公共中继命令注册命令 { 得到 { 返回寄存器命令？？ （registerCommand=新的RelayCommand（（）=> { var\u user=newregisteruser（名称、姓氏、登录名、哈希、加密（密码）、邮件）； db.Users.Add（_user）； db.SaveChanges（）； })); } } 公共ObservableCollection用户{get；set；} 公共注册服务模型（） { db=新的ApplicationDbContext（）； } } 这是登录视图模型

public class RegisterViewModel : BaseViewModel
{
    Hashing hashing = new Hashing();
    ApplicationDbContext db;
    private string name;
    public string Name
    {
        get => name;
        set
        {
            name = value;
            OnPropertyChanged(nameof(Name));
        }
    }
    private string lastName;
    public string LastName
    {
        get => lastName;
        set
        {
            lastName = value;
            OnPropertyChanged(nameof(LastName));
        }
    }
    private string login;
    public string Login
    {
        get => login;
        set
        {
            login = value;
            OnPropertyChanged(nameof(Login));
        }
    }

    private string password;
    public string Password
    {
        get { return password; }
        set
        {
            if (password != value)
            {
                password = value;
                OnPropertyChanged("Password");
            }
        }
    }
    private string mail;
    public string Mail
    {
        get => mail;
        set
        {
            mail = value;
            OnPropertyChanged(nameof(Mail));
        }
    }



    public ICommand Command { get; set; }

    private RelayCommand registerCommand;
    public RelayCommand RegisterCommand
    {
        get
        {
            return registerCommand ??
                (registerCommand = new RelayCommand(() =>
                {
                    var _user = new RegisterUser(Name, LastName, Login, hashing.Encrypt(Password), Mail);
                    db.Users.Add(_user);
                    db.SaveChanges();
                }));
        }
    }

    public ObservableCollection<User> Users { get; set; }
    public RegisterViewModel()
    {
        db = new ApplicationDbContext();
    }
}

 ApplicationDbContext db;
    IEnumerable<User> users;

    public LoginViewModel(IViewFactory viewFactory, ICore core) : base(viewFactory)
    {
        db = new ApplicationDbContext();
    }

    public ICommand Command { get; set; }

    private string login;
    public string Login
    {
        get => login;
        set
        {
            login = value;
            RaisePropertyChanged(nameof(Login));
        }
    }
    private string password;
    public string Password
    {
        get => password;
        set
        {
            password = value;
            RaisePropertyChanged(nameof(Password));
        }
    }

    private RelayCommand addCommand;
    public RelayCommand AddCommand
    {
        get
        {
            return addCommand ??
                (addCommand = new RelayCommand(() =>
                {
                }));
        }
    }

    public IEnumerable<User> Users
    {
        get { return users; }
        set
        {
            users = value;
            RaisePropertyChanged("Users");
        }
    }
}

private RelayCommand loginUser;
    public RelayCommand LoginUser
    {
        get
        {
            return loginUser ??
                (loginUser = new RelayCommand(() =>
                {
                    var result = _authorizationService.Login(Login, hashing.Encrypt(Password));
                }));
        }
    }

ApplicationDbContext数据库；
i无数用户；
公共LoginViewModel（IViewFactory viewFactory，ICore core）：基础（viewFactory）
{
db=新的ApplicationDbContext（）；
}
公共ICommand命令{get；set；}
私有字符串登录；
公共字符串登录
{
get=>login；
设置
{
登录=值；
RaisePropertyChanged（名称（登录））；
}
}
私有字符串密码；
公共字符串密码
{
获取=>密码；
设置
{
密码=值；
RaisePropertyChanged（名称（密码））；
}
}
专用RelayCommand addCommand；
公共RelayCommand AddCommand
{
得到
{
返回addCommand？？
（addCommand=newrelayCommand（（）=>
{
}));
}
}
公共IEnumerable用户
{
获取{返回用户；}
设置
{
用户=价值；
RaisePropertyChanged（“用户”）；
}
}
}

我做了，很简单）

和登录视图模型

public class RegisterViewModel : BaseViewModel
{
    Hashing hashing = new Hashing();
    ApplicationDbContext db;
    private string name;
    public string Name
    {
        get => name;
        set
        {
            name = value;
            OnPropertyChanged(nameof(Name));
        }
    }
    private string lastName;
    public string LastName
    {
        get => lastName;
        set
        {
            lastName = value;
            OnPropertyChanged(nameof(LastName));
        }
    }
    private string login;
    public string Login
    {
        get => login;
        set
        {
            login = value;
            OnPropertyChanged(nameof(Login));
        }
    }

    private string password;
    public string Password
    {
        get { return password; }
        set
        {
            if (password != value)
            {
                password = value;
                OnPropertyChanged("Password");
            }
        }
    }
    private string mail;
    public string Mail
    {
        get => mail;
        set
        {
            mail = value;
            OnPropertyChanged(nameof(Mail));
        }
    }



    public ICommand Command { get; set; }

    private RelayCommand registerCommand;
    public RelayCommand RegisterCommand
    {
        get
        {
            return registerCommand ??
                (registerCommand = new RelayCommand(() =>
                {
                    var _user = new RegisterUser(Name, LastName, Login, hashing.Encrypt(Password), Mail);
                    db.Users.Add(_user);
                    db.SaveChanges();
                }));
        }
    }

    public ObservableCollection<User> Users { get; set; }
    public RegisterViewModel()
    {
        db = new ApplicationDbContext();
    }
}

 ApplicationDbContext db;
    IEnumerable<User> users;

    public LoginViewModel(IViewFactory viewFactory, ICore core) : base(viewFactory)
    {
        db = new ApplicationDbContext();
    }

    public ICommand Command { get; set; }

    private string login;
    public string Login
    {
        get => login;
        set
        {
            login = value;
            RaisePropertyChanged(nameof(Login));
        }
    }
    private string password;
    public string Password
    {
        get => password;
        set
        {
            password = value;
            RaisePropertyChanged(nameof(Password));
        }
    }

    private RelayCommand addCommand;
    public RelayCommand AddCommand
    {
        get
        {
            return addCommand ??
                (addCommand = new RelayCommand(() =>
                {
                }));
        }
    }

    public IEnumerable<User> Users
    {
        get { return users; }
        set
        {
            users = value;
            RaisePropertyChanged("Users");
        }
    }
}

private RelayCommand loginUser;
    public RelayCommand LoginUser
    {
        get
        {
            return loginUser ??
                (loginUser = new RelayCommand(() =>
                {
                    var result = _authorizationService.Login(Login, hashing.Encrypt(Password));
                }));
        }
    }