为我的电子调查应用程序创建一个 .csv 文件。我该如何开始？

Question

我在编写 Esurvey 应用程序（使用 Windows Store C# XAML）时遇到问题，我真的需要帮助。我需要创建一个包含所有结果（单选按钮选择和文本输入）的 .csv 数据库，但我不确定从哪里开始。

有人可以帮我解决这个问题吗？我正在使用 Visual Studio Community 2013。

using FYPPrototype1.Common;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices.WindowsRuntime;
using System.Text;
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 Basic Page item template is documented at http://go.microsoft.com/fwlink/?LinkId=234237

namespace FYPPrototype1
{
/// <summary>
/// A basic page that provides characteristics common to most applications.
/// </summary>
/// 


public sealed partial class SurveyPage1 : Page
{

    private NavigationHelper navigationHelper;
    private ObservableDictionary defaultViewModel = new ObservableDictionary();

    /// <summary>
    /// This can be changed to a strongly typed view model.
    /// </summary>
    public ObservableDictionary DefaultViewModel
    {
        get { return this.defaultViewModel; }
    }

    /// <summary>
    /// NavigationHelper is used on each page to aid in navigation and 
    /// process lifetime management
    /// </summary>
    public NavigationHelper NavigationHelper
    {
        get { return this.navigationHelper; }
    }


    public SurveyPage1()
    {
        this.InitializeComponent();
        this.navigationHelper = new NavigationHelper(this);
        this.navigationHelper.LoadState += navigationHelper_LoadState;
        this.navigationHelper.SaveState += navigationHelper_SaveState;
    }

    /// <summary>
    /// Populates the page with content passed during navigation. Any saved state is also
    /// provided when recreating a page from a prior session.
    /// </summary>
    /// <param name="sender">
    /// The source of the event; typically <see cref="NavigationHelper"/>
    /// </param>
    /// <param name="e">Event data that provides both the navigation parameter passed to
    /// <see cref="Frame.Navigate(Type, Object)"/> when this page was initially requested and
    /// a dictionary of state preserved by this page during an earlier
    /// session. The state will be null the first time a page is visited.</param>
    private void navigationHelper_LoadState(object sender, LoadStateEventArgs e)
    {
        if (e.PageState != null && e.PageState.ContainsKey("rbNumber1") && e.PageState.ContainsKey("rbNumber2") && e.PageState.ContainsKey("rbNumber3") && e.PageState.ContainsKey("rbNumber4"))
        {
            radioExcellent.IsChecked = (bool)e.PageState["rbNumber1"];
            radioGood.IsChecked = (bool)e.PageState["rbNumber2"];
            radioPoor.IsChecked = (bool)e.PageState["rbNumber3"];
            radioAverage.IsChecked = (bool)e.PageState["rbNumber4"];
        }
    }

    /// <summary>
    /// Preserves state associated with this page in case the application is suspended or the
    /// page is discarded from the navigation cache.  Values must conform to the serialization
    /// requirements of <see cref="SuspensionManager.SessionState"/>.
    /// </summary>
    /// <param name="sender">The source of the event; typically <see cref="NavigationHelper"/></param>
    /// <param name="e">Event data that provides an empty dictionary to be populated with
    /// serializable state.</param>
    private void navigationHelper_SaveState(object sender, SaveStateEventArgs e)
    {
        e.PageState["rbNumber1"] = radioExcellent.IsChecked;
        e.PageState["rbNumber2"] = radioGood.IsChecked;
        e.PageState["rbNumber3"] = radioPoor.IsChecked;
        e.PageState["rbNumber4"] = radioAverage.IsChecked;
    }

    #region NavigationHelper registration

    /// The methods provided in this section are simply used to allow
    /// NavigationHelper to respond to the page's navigation methods.
    /// 
    /// Page specific logic should be placed in event handlers for the  
    /// <see cref="GridCS.Common.NavigationHelper.LoadState"/>
    /// and <see cref="GridCS.Common.NavigationHelper.SaveState"/>.
    /// The navigation parameter is available in the LoadState method 
    /// in addition to page state preserved during an earlier session.

    protected override void OnNavigatedTo(NavigationEventArgs e)
    {
        navigationHelper.OnNavigatedTo(e);
    }

    protected override void OnNavigatedFrom(NavigationEventArgs e)
    {
        navigationHelper.OnNavigatedFrom(e);
    }

    #endregion

    private async void Button_S1_S2(object sender, RoutedEventArgs e)
    {
        if (radioExcellent.IsChecked != true && radioGood.IsChecked != true && radioAverage.IsChecked != true && radioPoor.IsChecked != true)
        {
            MessageDialog md = new MessageDialog("Please select an option before proceeding!");
            await md.ShowAsync();
        }

        else
        {
            this.Frame.Navigate(typeof(SurveyPage2));
        }
    }
}
}

这是我的应用程序的屏幕截图，以供您参考。

这是我老师想要的输出，但我不知道如何制作它，如图所示:(

Answer 1

你可以这样做，其中 "greetingOutputText" 是关键

private void navigationHelper_LoadState(object sender, LoadStateEventArgs e)
        {
            // Restore values stored in session state.
            if (e.PageState != null && e.PageState.ContainsKey("greetingOutputText"))
            {
                greetingOutput.Text = e.PageState["greetingOutputText"].ToString();
            }
        }



private void navigationHelper_SaveState(object sender, SaveStateEventArgs e)
        {
            e.PageState["greetingOutputText"] = greetingOutput.Text;

        }

这篇link会对你有所帮助。

为我的电子调查应用程序创建一个 .csv 文件。我该如何开始？

Creating a .csv file for my esurvey application. How do I start?

c#

wpf

xaml

windows-store-apps

visual-studio-2013