Question

我尝试使用我正在创建的Windows手机应用程序将数据从一个页面传输到另一个页面。我收到错误错误1名称＆＃39; enterNameBox＆＃39;在当前上下文中不存在谁能告诉我我做错了什么？第一页（getStartedButton带你到其他页面） [代码]

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Navigation;
using Microsoft.Phone.Controls;
using Microsoft.Phone.Shell;
using FinalProjectPhoneVersion.Resources;

namespace FinalProjectPhoneVersion
{

    public partial class MainPage : PhoneApplicationPage
    {
        static int strikeCounter;
        static int counter;
        static Random random = new Random();

        static int randomNumber1;
        static int randomNumber2;

        // Constructor
        public MainPage()
        {
            InitializeComponent();

            // Sample code to localize the ApplicationBar
            //BuildLocalizedApplicationBar();
        }

        // Sample code for building a localized ApplicationBar
        //private void BuildLocalizedApplicationBar()
        //{
        //    // Set the page's ApplicationBar to a new instance of ApplicationBar.
        //    ApplicationBar = new ApplicationBar();

        //    // Create a new button and set the text value to the localized string from AppResources.
        //    ApplicationBarIconButton appBarButton = new ApplicationBarIconButton(new Uri("/Assets/AppBar/appbar.add.rest.png", UriKind.Relative));
        //    appBarButton.Text = AppResources.AppBarButtonText;
        //    ApplicationBar.Buttons.Add(appBarButton);

        //    // Create a new menu item with the localized string from AppResources.
        //    ApplicationBarMenuItem appBarMenuItem = new ApplicationBarMenuItem(AppResources.AppBarMenuItemText);
        //    ApplicationBar.MenuItems.Add(appBarMenuItem);
        //}
        public MathPage()
    {
        InitializeComponent();
        String welcomeString = (String)PhoneApplicationService.Current.State["enterNameBox"];
        RadioButton easyMode = (RadioButton)PhoneApplicationService.Current.State["easyMode"];
        RadioButton hardMode = (RadioButton)PhoneApplicationService.Current.State["hardMode"];
        welcomeLabel.Text = "Welcome " + welcomeString;
       if (easyMode.Checked = true) { 

        }
    }

        private void getStartedButton_Click(object sender, RoutedEventArgs e)
        {
            MathTime();
            NavigationService.Navigate(new Uri("/Page1.xaml?enterNameBox=test", UriKind.Relative));
        }
    }


    }

[/ code]

第二页 [代码]

     using System;
    using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Navigation;
using Microsoft.Phone.Controls;
using Microsoft.Phone.Shell;

namespace FinalProjectPhoneVersion
{
    public partial class MathPage : PhoneApplicationPage
    {
        public MathPage()
        {
            InitializeComponent();
            welcomeLabel.Text = "Welcome " + enterNameBox.Text;
        }

        private void TextBox_TextChanged(object sender, TextChangedEventArgs e)
        {

        }
        protected override void OnNavigatedTo(System.Windows.Navigation.NavigationEventArgs e)
        {
            base.OnNavigatedTo(e);
            string parameterValue = NavigationContext.QueryString["enterNameBox"];
        }
    }
}

[/代码]

Answer 1

我建议使用电话应用程序服务来保存页面之间的值。

PhoneApplicationService.Current.State["id_of_value"] = value;

第一页

PhoneApplicationService.Current.State["enterNameBox"] = "test"

第二页

String my_string = (String) PhoneApplicationService.Current.State["enterNameBox"];

可在此处找到更多信息How to preserve and restore app state for Windows Phone 8

编辑：正在回答你的单选按钮评论，但看起来你删除了它。它适用于大多数类型。

第一页

 PhoneApplicationService.Current.State["radio_button1"] = this.your_radio_button;

第二页

 RadioButton rb = (RadioButton)PhoneApplicationService.Current.State["radio_button1"];
 rb.IsChecked = true; // or false

当您按“返回”按钮时，“单选”按钮也会自动更新。

将数据从一个页面传输到另一个Windows 8手机应用程序

1 个答案: