【发布时间】:2017-08-11 18:27:37
【问题描述】:
我正在创建一个基本的 MCQ 应用程序,其中 2 个 MCQ 和选项显示在一个页面上,提交按钮在文本块的第二页上显示结果。
我正在使用Frame.Navigate(typeof(Page2)) 导航方法,它可以传递一个参数,但不能将多个参数传递到下一页。
这是我的代码:
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices.WindowsRuntime;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;
using Windows.UI.Xaml.Data;
using Windows.UI.Xaml.Input;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Navigation;
using Windows.UI.Popups;
// The Blank Page item template is documented at http://go.microsoft.com/fwlink/?LinkId=391641
namespace MCQ
{
/// <summary>
/// An empty page that can be used on its own or navigated to within a Frame.
/// </summary>
public sealed partial class MainPage : Page
{
public MainPage()
{
this.InitializeComponent();
this.NavigationCacheMode = NavigationCacheMode.Required;
}
/// <summary>
/// Invoked when this page is about to be displayed in a Frame.
/// </summary>
/// <param name="e">Event data that describes how this page was reached.
/// This parameter is typically used to configure the page.</param>
protected override void OnNavigatedTo(NavigationEventArgs e)
{
// TODO: Prepare page for display here.
// TODO: If your application contains multiple pages, ensure that you are
// handling the hardware Back button by registering for the
// Windows.Phone.UI.Input.HardwareButtons.BackPressed event.
// If you are using the NavigationHelper provided by some templates,
// this event is handled for you.
}
private void button_Click(object sender, RoutedEventArgs e)
{
string ans1 = "";
string ans2 = "";
if (radioButton.IsChecked == true)
{
ans1 = "Answer 1 is correct";
}
else
{
ans1 = "Answer 1 is incorrect";
}
if (radioButton2.IsChecked == true)
{
ans2 = "Answer 2 is correct";
}
else
{
ans2 = "Answer 2 is incorrect";
}
Frame.Navigate(typeof(Page2), ans1, ans2);
//textBlock3.Text = ans1 + " & " + ans2; ;
}
private void button1_Click(object sender, RoutedEventArgs e)
{
}
}
}
我得到错误无法从字符串转换为 windows.ui.xaml.media。 navigation.transitioninfo 关于第二个参数,即 ans2。
任何帮助或将参数传递到下一页的替代方法将不胜感激。 谢谢!
【问题讨论】:
-
您是否尝试过创建一个包含所有变量的新类对象并传递该对象?
-
就个人而言,我总是使用字符串。如果我有几个参数,我有一个类似于 URI 查询字符串的表示:param1=value1¶m2=value2。请记住,您的参数对象必须是可序列化的,请参阅docs.microsoft.com/en-us/uwp/api/…
-
@SimonPrice 有道理。最好实现单例对象
-
更好的选择是创建 JSON 对象并将其作为 json 字符串传递。这可以使用 Newtsonsoft nuget 包来实现。
标签: c# xaml windows-phone-8 windows-phone