在Windows Phone 8中選擇聯系人

Question

我正在嘗試將基本聯系人列表添加到我的應用中。

到目前為止，該應用程序查詢聯系人存儲並在列表中顯示所有內容。

我需要的是一個數據結構，其中包含用戶從列表中選擇的每個聯系人的姓名和電話號碼。

我很樂意看到您的想法。 我相信這將是我想念的簡單事情，但是我已經做了很多嘗試，但現在卻感到非常困惑。

這是相關的代碼片段和隨附的XAML。 非常感謝您的參與。 C＃更新

namespace appNamespace
{
    public partial class contact : PhoneApplicationPage
    {
        public class CustomContact
        {
            public string Name { get; set; }
            public string Number { get; set; }

            public CustomContact()
            {
            }

            //CTOR that takes in a Contact object and extract the two fields we need (can add more fields)
            public CustomContact(Contact contact)
            {
                Name = contact.DisplayName;
                var number = contact.PhoneNumbers.FirstOrDefault();
                if (number != null)
                    Number = number.PhoneNumber;
                else
                    Number = "";
            }
        }

        public contact()
        {
            InitializeComponent();
        }

        private void showContacts(object sender, RoutedEventArgs e)
        {
            Contacts cons = new Contacts();

            //Identify the method that runs after the asynchronous search completes.
            cons.SearchCompleted += new EventHandler<ContactsSearchEventArgs>(Contacts_SearchCompleted);

            //Start the asynchronous search.
            cons.SearchAsync(String.Empty, FilterKind.None, "Contacts Test #1");
        }

        void Contacts_SearchCompleted(object sender, ContactsSearchEventArgs e)
        {
            //Do something with the results.
            MessageBox.Show(e.Results.Count().ToString());
            try
            {
                //Bind the results to the user interface.
                ContactResultsData.DataContext = e.Results;

            }
            catch (System.Exception)
            {
                //No results
            }

            if (ContactResultsData.Items.Any())
            {
                ContactResultsLabel.Text = "results";
            }
            else
            {
                ContactResultsLabel.Text = "no results";
            }
        }

        public void saveContacts(object sender, RoutedEventArgs e)
        {
            List<CustomContact> listOfContacts = new List<CustomContact>();

            listOfContacts = e.Results.Select(x => new CustomContact()
            {
                Number = x.PhoneNumbers.FirstOrDefault() != null ? x.PhoneNumbers.FirstOrDefault().PhoneNumber : "",
                Name = x.DisplayName
            }).ToList();
        }

        private void ContactResultsData_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            Contact contact = ContactResultsData.SelectedItem as Contact;
            if (contact != null)
            {
                CustomContact customContact = new CustomContact(contact);
            }
        }

    }
}

XAML

<Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0">
            <StackPanel Height="Auto" Width="Auto" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Margin="0,0,0,10" >

                <TextBlock Name="ContactResultsLabel" Text="results are loading..." Style="{StaticResource PhoneTextLargeStyle}" TextWrapping="Wrap" />

                <ListBox Name="ContactResultsData" ItemsSource="{Binding}" Height="436" Margin="12,0" SelectionMode="Multiple" >
                    <ListBox.ItemTemplate>
                        <DataTemplate>
                            <TextBlock Name="ContactResults" FontSize="{StaticResource PhoneFontSizeMedium}" Text="{Binding Path=DisplayName, Mode=OneWay}" />
                        </DataTemplate>
                    </ListBox.ItemTemplate>
                </ListBox>
            </StackPanel>
            <Button x:Name="showButton" Content="Show Contacts" HorizontalAlignment="Left" VerticalAlignment="Top" Width="218" Height="90" Margin="0,531,0,0" Click="showContacts"/>
            <Button x:Name="saveButton" Content="Save Contacts" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="238,531,0,0" Width="218" Height="90" Click="saveContacts"/>
        </Grid>

Answer 1

您可以創建自己的課程

public class CustomContact
{
   public string Name { get; set; }
   public string Number { get; set; }

   public CustomContact()
    {
    }

    //CTOR that takes in a Contact object and extract the two fields we need (can add more fields)
    public CustomContact(Contact contact)
    {
        DisplayName = contact.DisplayName;
        var number = contact.PhoneNumbers.FirstOrDefault();
        if(number != null)
            Number = number.PhoneNumber;
        else
            Number = "";
    }
}

然后遍歷結果並將其添加到您的課程中

List<CustomContact> listOfContacts = new List<CustomContact>();
foreach (var c in e.Results)
{
    CustomContact contact  = new CustomContact();
    contact.DisplayName = c.DisplayName;
    var number = c.PhoneNumbers.FirstOrDefault(); //change this to whatever number you want
    if (number != null)
        contact.Number = number.PhoneNumber;
    else
        contact.Number = "";

    listOfContacts.Add(contact);
}
ContactResultsData.DataContext = listOfContacts;

您可以將上面的foreach循環縮短為一個LINQ查詢

listOfContacts = e.Results.Select(x => new CustomContact() 
                                  { 
                                     Number = x.PhoneNumbers.FirstOrDefault() != null ? x.PhoneNumbers.FirstOrDefault().PhoneNumber : "", 
                                     DisplayName = x.DisplayName 
                                  }).ToList();

根據評論更新。

假設您不使用上述方法，則ListBox中將填充Contact對象（而不是我們的CustomContact對象）。 因此，我們將所選項目轉換為Contact對象，並使用接受了Contact對象的重載構造函數來創建所需的CustomContact對象。

private void ContactResultsData_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
    Contact contact = ContactResultsData.SelectedItem as Contact;
    if (contact != null)
    {
        CustomContact customContact = new CustomContact(contact);
    }
}