wpf - xaml是什么 - 如何在登录和diplay主窗口后关闭DialogWIndow?



(1)

我有一个登录窗口和主窗口。 现在,我想关闭登录窗口,成功登录,我的主窗口应该打开。 但到目前为止,我正在打开这两个窗口打开这是令人恼火的..我已经尝试了代码在app.xaml后面的代码,但它关闭了整个应用程序...

DataRepository repository = new DataRepository();
ViewModelPassword viewModelPassword = new ViewModelPassword(repository);

passwordDialog passwordDialog = new PasswordDialog();
passwordDialog.DataContext = viewModelPassword;

viewModelPassword.RequestClose += (s, ee) => passwordDialog.Close();
passwordDialog.ShowDialog();

Mainviewmodel viewModel = new Mainviewmodel (repository, viewModelPassword.Login);
MainWindow window = new MainWindow();

window.DataContext = viewModel;
window.Show();

base.OnStartup(e);

登录命令成功登录后,我想显示主窗口。

https://src-bin.com


Answer #1

你甚至在运行启动代码之前都会显示Windows,所以在应用程序启动时,两个窗口都显示出来。

以下是我通常用于此方案的代码:

protected override void OnStartup(StartupEventArgs e)
{
    // Run startup code first
    base.OnStartup(e); 

    // Create Login Window and Show it
    var login = new LoginDialog();
    var loginVm = new LoginViewModel();

    login.DataContext = loginVm;
    login.ShowDialog();

    // If login window didn't return true (login failed), exit application
    if (!login.DialogResult.GetValueOrDefault())
    {
        Environment.Exit(0);
    }

    // Providing we have a successful login, start main application window
    var app = new ShellView();
    var context = new ShellViewModel(loginVm.CurrentUser);
    app.DataContext = context;
    app.Show();
}