Question

我正在研究WP7应用程序，如果日历上的当前事件是“会议”，我需要它来播放第一个链接中的歌曲。但是，使用当前代码，即使事件设置正确，它也会播放第二首歌曲，如果是第一首歌曲。

这是我的代码：

public partial class MainPage : PhoneApplicationPage
{   
    // Constructor
    public MainPage()
    {
        InitializeComponent();

        // Set the data context of the listbox control to the sample data
        DataContext = App.ViewModel;
        this.Loaded += new RoutedEventHandler(MainPage_Loaded);
    }

    // Load data for the ViewModel Items
    private void MainPage_Loaded(object sender, RoutedEventArgs e)
    {
        if (!App.ViewModel.IsDataLoaded)
        {
            App.ViewModel.LoadData();
        }
    }        

    private void button1_Click(object sender, RoutedEventArgs e)
    {            
        Appointments appts = new Appointments();

        //Identify the method that runs after the asynchronous search completes.
        appts.SearchCompleted += new EventHandler<AppointmentsSearchEventArgs>(Appointments_SearchCompleted);

        DateTime start = DateTime.Now;
        DateTime end = DateTime.Now;
        int max = 1;

        //Start the asynchronous search.
        appts.SearchAsync(start, end, max, "Appointments Test #1");
        textBlock3.Text = DateTime.Now.ToString("hh:mm:ss tt");
    }

    void Appointments_SearchCompleted(object sender, AppointmentsSearchEventArgs e)
    {
        try
        {
            AppointmentResultsDataLINQ.DataContext =
                from Appointment appt in e.Results
                where appt.IsAllDayEvent == false                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
                select appt;       

        }
        catch (System.Exception)
        {

        }
    }

    private void button2_Click(object sender, RoutedEventArgs e)
    {

        if ((AppointmentResultsDataLINQ.DataContext).Equals("Meeting"))
        {
             mediaElement1.Source = new Uri("http://www.opendrive.com/files/NV8zNTMwNDYwX2hxRXZR/Crystallize.mp3", UriKind.Absolute);              
        }          

        else
        {
            mediaElement1.Source = new Uri("https://www.opendrive.com/files/NV8zMjAxODY0X0VBNDJY/Hetken%20tie%20on%20kevyt%20(piano%20cover)%20-%20YouTube.mp3", UriKind.Absolute);                
        }
            mediaElement1.Play();
    }          
}

Answer 1

问题似乎是这一行：

if ((AppointmentResultsDataLINQ.DataContext).Equals("Meeting"))

您正在将ToString()实例上的Appointment方法调用结果与字符串“Meeting”进行比较。

你可能想要：

if ((AppointmentResultsDataLINQ.DataContext as Appointment).Subject.Equals("Meeting"))

<强>更新
你实际上正在检查一个可预约的任命以下是检查其中任何一个是否为“会议”的方法：

if ((AppointmentResultsDataLINQ.DataContext as IEnumerable<Appointment>).Any(app => app.Subject.Equals("Meeting")))

从WP7日历中获取具体事件

1 个答案: