【转】【WPF】WPF 登录窗口关闭时打开主窗口

在WPF中设计登录窗口关闭时打开主窗口，自动生成的App.xaml不能满足要求，

1、把App.xaml的属性窗口中的生成操作设定为 无

2、添加Program类

static class Program
    {
        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main()
        {
            LoginWindow loginForm = new LoginWindow();
            loginForm.Init();
            bool? rt = loginForm.ShowDialog();
            loginForm.Close();
            if (rt == true)
            {
                Application App = new Application();
                App.ShutdownMode = ShutdownMode.OnMainWindowClose;
                MainWindow m_MianWindow = new MainWindow();
                App.MainWindow = m_MianWindow;
                App.Run(m_MianWindow);
            }
        }
    }

方法二：

public partial class App : Application
    {
        protected override void OnStartup(StartupEventArgs e)
        {
            Application.Current.ShutdownMode = System.Windows.ShutdownMode.OnExplicitShutdown;
            LoginWindow window = new LoginWindow();
            bool? dialogResult = window.ShowDialog();
            if ((dialogResult.HasValue == true) &&
                (dialogResult.Value == true))
            {
                base.OnStartup(e);
                Application.Current.ShutdownMode = ShutdownMode.OnMainWindowClose;
            }
            else
            {
                this.Shutdown();
            }
        }
    }

原文地址：http://www.cnblogs.com/sshoub/archive/2012/08/16/2642262.html