登录后如何关闭DialogWIndow并显示主窗口? [英] How to Close a DialogWIndow after login and display main window?

问题描述

我有一个登录窗口和一个主窗口.现在，我想在成功登录后关闭登录窗口，然后我的主窗口应该打开.但到目前为止，我的两个窗户都打开了，这让我很恼火.

I have a login window and a main window. Now, I want to close the login window after a successful login and my main window should then open. But so far, I am getting both windows opening which is irritating me.

我在 app.xaml 后面的代码中尝试了下面的代码，但它关闭了整个应用程序...

I have tried the code below in the code behind of app.xaml but it closes the whole application...

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);

login 命令发起成功登录后，我想显示主窗口.

After the login command has initiated a successful login, I want to display the main window.

推荐答案

您在运行启动代码之前就显示了两个 Windows，因此在应用程序启动时，两个窗口都显示了.

You are showing both Windows before even running the startup code, so on application startup both windows are showing.

这是我通常用于此场景的代码:

Here's the code I typically use for this scenario:

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();
}

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