silverlight学习之页面传值篇

1、silverlight 实现页面导航跳转
   （1）利用根视图
    A、修改App.xmal.cs
     //使用根视图实现页面导航跳转
        //申明一个Grid对象
        private Grid rootGrid = new Grid();

private void Application_Startup(object sender, StartupEventArgs e)
        {
            this.RootVisual = rootGrid;
            rootGrid.Children.Add(new MainPage());
        }

//定义方法实现导航
        public static void Navigation(UserControl newPage)
        {
            //获取当前的Application实例
            App currentApp = (App)Application.Current;
            //修改当前显示的页面内容
            currentApp.rootGrid.Children.Clear();
            currentApp.rootGrid.Children.Add(newPage);
        }

B、在页面MainPage.xaml中调用

private void button1_Click(object sender, RoutedEventArgs e)
        {
            App.Navigation(new Control1());
        }

这样，当我在点击button按钮时，就会从MainPage.xaml页面跳转到Control1.xaml页面了。

2、silverlight中实现页面传值
   
   该实例中使用独立存储的IsolatedStorageSettings 对象进行页面之间的传值

将文本框txtName的值由MainPage.xaml页面传到Main.xaml页面。

（1）使用该对象前，要在cs页面调用命名空间：System.IO.IsolatedStorage；
   （2）MainPage.xaml:
     //定义独立的存储对象
        private IsolatedStorageSettings appSetting = IsolatedStorageSettings.ApplicationSettings;
        private void button1_Click(object sender, RoutedEventArgs e)
        {
            if (txtName.Text != null && txtPwd.Text != null)
            {
                if (txtName.Text == "rainie" && txtPwd.Text == "123")
                {
                    //页面传值
                    if (!appSetting.Contains("name"))
                    {
                        appSetting.Add("name", txtName.Text.Trim());
                    }
              else
              {
               appSetting.Clear();
               appSetting.Add("name",txtName.Text.Trim());
            }

App.Navigation(new Main());
                }
            }
        }

（3）Main.xaml接收值：
     //申明变量
        private IsolatedStorageSettings appSetting = IsolatedStorageSettings.ApplicationSettings;
        private void LayoutRoot_Loaded(object sender, RoutedEventArgs e)
        {
            if (appSetting.Contains("name"))
            {
                tbName.Text = appSetting["name"].ToString();
            }
        }

这样就实现了silverlight的页面传值功能。