2021-09-02 WPF上位机通用框架平台实战-登录窗口

墨蓝 2022-09-09 14:49 175阅读 0赞

![在这里插入图片描述][watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBA5b6u6L2vTVZQIEVsZXZlbg_size_20_color_FFFFFF_t_70_g_se_x_16]

## 一：登录窗口布局和功能实现 ##

/// <summary>
    /// LoginWindow.xaml 的交互逻辑
    /// </summary>
    public partial class LoginWindow : Window
    { 
        public LoginWindow()
        { 
            InitializeComponent();
            this.DataContext = new LoginViewModel();
        }
    
        private void Grid_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
        { 
            this.DragMove();
        }
    }

public class UserModel : NotifyBase
    { 
        private string _userName;
    
        public string UserName
        { 
            get {  return _userName; }
            set {  _userName = value; this.NotifyChanged(); }
        }
    
        private string _password = "";
    
        public string Password
        { 
            get {  return _password; }
            set {  _password = value; this.NotifyChanged(); }
        }
    
        public string RealName {  get; set; }
        public string Avatar {  get; set; }
    }

public class LoginViewModel : NotifyBase
    { 
        LoginService loginService = new LoginService();
    
        public UserModel UserModel {  get; set; } = new UserModel();
    
        private string _errorMsg;
    
        public string ErrorMsg
        { 
            get {  return _errorMsg; }
            set {  _errorMsg = value; this.NotifyChanged(); }
        }
    
    
        private CommandBase _closeCommand;
    
        public CommandBase CloseCommand
        { 
            get
            { 
                if (_closeCommand == null)
                { 
                    _closeCommand = new CommandBase();
                    _closeCommand.DoExecute = new Action<object>(obj =>
                    { 
                        (obj as System.Windows.Window).DialogResult = false;
                    });
                }
                return _closeCommand;
            }
        }
    
    
        private CommandBase _loginCommand;
    
        public CommandBase LoginCommand
        { 
            get
            { 
                if (_loginCommand == null)
                { 
                    _loginCommand = new CommandBase();
                    _loginCommand.DoExecute = new Action<object>(obj =>
                    { 
                        this.ErrorMsg = "";
                        try
                        { 
                            if (loginService.CheckLogin(UserModel.UserName, UserModel.Password))
                                (obj as System.Windows.Window).DialogResult = true;
                        }
                        catch (Exception ex)
                        { 
                            this.ErrorMsg = ex.Message;
                        }
                    });
                }
                return _loginCommand;
            }
        }
    }

事件触发功能封装

public class CommandBase : ICommand
    { 
        public event EventHandler CanExecuteChanged;
    
        public bool CanExecute(object parameter)
        { 
            return true;
        }
    
        public void Execute(object parameter)
        { 
            DoExecute?.Invoke(parameter);
        }
    
        public Action<object> DoExecute {  get; set; }
    }

双向绑定功能封装

public class NotifyBase : INotifyPropertyChanged
    { 
        public event PropertyChangedEventHandler PropertyChanged;
    
        public void NotifyChanged([CallerMemberName] string propName = "")
        { 
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propName));
        }
    }

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