重新想象 Windows 8 Store Apps (27) - 选取器: 联系人选取窗口, 自定义联系人选取窗口

<Page
x:Class="XamlDemo.Picker.MyContactPicker"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:XamlDemo.Picker"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d"> <Grid Background="Transparent">
<StackPanel Margin="120 0 0 0"> <TextBlock Name="lblMsg" FontSize="14.667" /> <Button Name="btnAddContract" Content="增加一个联系人" Click="btnAddContract_Click" Margin="0 10 0 0" /> </StackPanel>
</Grid>
</Page>

/*
* 演示如何开发自定义的联系人选取器
*
* 1、在 Package.appxmanifest 中新增一个“联系人选取器”声明，并做相关配置
* 2、在 App.xaml.cs 中 override void OnActivated(IActivatedEventArgs args)，以获取联系人选取器的相关信息
*
* ContactPickerActivatedEventArgs - 通过“联系人选取器”激活应用程序时的事件参数
* ContactPickerUI - 获取 ContactPickerUI 对象
* PreviousExecutionState, Kind, SplashScreen - 各种激活 app 的方式的事件参数基本上都有这些属性，就不多说了
*
* ContactPickerUI - 自定义联系人选取器的帮助类
* SelectionMode - 获取由 ContactPicker（调用者）设置的 SelectionMode 属性
* DesiredFields - 获取由 ContactPicker（调用者）设置的 DesiredFields 属性
* AddContact(string id, Contact contact) - 选取一个联系人
* id - 联系人标识
* contact - 一个 Contact 对象
* RemoveContact() - 删除指定标识的联系人
* ContainsContact() - 指定标识的联系人是否已被选取
* ContactRemoved - 移除一个已被选取的联系人时所触发的事件
*
* Contact - 返回给调用者的联系人对象
* Name - 名称
* Thumbnail - 缩略图
* Fields - 联系人的字段数据，每一条数据都是一个实现了 IContactField 接口的对象
*
* ContactField - 实现了 IContactField 接口，用于描述联系人的某一个字段数据
* Type - 字段类型（ContactFieldType 枚举）
* Email, PhoneNumber, Location, InstantMessage, Custom
* Category - 字段类别（ContactFieldCategory 枚举）
* None, Home, Work, Mobile, Other
* Value - 字段的值
*/using System;
using Windows.ApplicationModel.Activation;
using Windows.ApplicationModel.Contacts.Provider;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Navigation;
using Windows.ApplicationModel.Contacts;
using Windows.Storage.Streams;
using Windows.UI.Core;namespace XamlDemo.Picker
{
public sealed partial class MyContactPicker : Page
{
private ContactPickerUI _contactPickerUI; public MyContactPicker()
{
this.InitializeComponent();
} protected override void OnNavigatedTo(NavigationEventArgs e)
{
// 获取 ContactPickerUI 对象
var contactPickerActivated = e.Parameter as ContactPickerActivatedEventArgs;
_contactPickerUI = contactPickerActivated.ContactPickerUI; _contactPickerUI.ContactRemoved += _contactPickerUI_ContactRemoved;
} protected override void OnNavigatedFrom(NavigationEventArgs e)
{
_contactPickerUI.ContactRemoved -= _contactPickerUI_ContactRemoved;
} // 从选取缓冲区移除后
async void _contactPickerUI_ContactRemoved(ContactPickerUI sender, ContactRemovedEventArgs args)
{
// 注意：无法直接得知 ContactPickerUI 是单选模式还是多选模式，需要判断当添加了一个联系人后，再添加一个联系人，如果系统会自动移除前一个联系人，则说明是单选模式
await this.Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
{
lblMsg.Text += "removed contact: " + args.Id;
lblMsg.Text += Environment.NewLine;
});
} private void btnAddContract_Click(object sender, RoutedEventArgs e)
{
Random random = new Random(); // 构造一个 Contact 对象
Contact contact = new Contact();
contact.Name = "webabcd " + random.Next(, ).ToString();
contact.Fields.Add(new ContactField(random.Next(, ).ToString(), ContactFieldType.Email, ContactFieldCategory.Home));
contact.Fields.Add(new ContactField(random.Next(, ).ToString(), ContactFieldType.Email, ContactFieldCategory.Work));
contact.Fields.Add(new ContactField(random.Next(, ).ToString(), ContactFieldType.PhoneNumber, ContactFieldCategory.Home));
contact.Fields.Add(new ContactField(random.Next(, ).ToString(), ContactFieldType.PhoneNumber, ContactFieldCategory.Work));
contact.Thumbnail = RandomAccessStreamReference.CreateFromUri(new Uri("ms-appx:///Assets/Logo.png", UriKind.Absolute)); string id = Guid.NewGuid().ToString(); // 向选取缓冲区新增一个联系人
switch (_contactPickerUI.AddContact(id, contact))
{
case AddContactResult.Added: // 已被成功添加
lblMsg.Text += "added contact: " + id;
lblMsg.Text += Environment.NewLine;
break;
case AddContactResult.AlreadyAdded: // 选取缓冲区已有此联系人
lblMsg.Text += "already added contact: " + id;
lblMsg.Text += Environment.NewLine;
break;
case AddContactResult.Unavailable: // 无效联系人
lblMsg.Text += "unavailable contact: " + id;
lblMsg.Text += Environment.NewLine;
break;
}
}
}
}

protected override void OnActivated(IActivatedEventArgs args)
{
// 通过联系人选取器激活应用程序时
if (args.Kind == ActivationKind.ContactPicker)
{
ContactPickerActivatedEventArgs contactPickerArgs = args as ContactPickerActivatedEventArgs; Frame rootFrame = new Frame();
rootFrame.Navigate(typeof(MainPage), contactPickerArgs);
Window.Current.Content = rootFrame; Window.Current.Activate();
}
}

<Page
x:Class="XamlDemo.Picker.ContactPickerDemo"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:XamlDemo.Picker"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d"> <Grid Background="Transparent">
<StackPanel Margin="120 0 0 0"> <TextBlock Name="lblMsg" FontSize="14.667" /> <Image Name="imgThumbnail" Width="100" Height="100" HorizontalAlignment="Left" Margin="0 10 0 0" /> <Button Name="btnPickContact" Content="pick a contact" Click="btnPickContact_Click" Margin="0 10 0 0" /> <Button Name="btnPickContacts" Content="pick multiple contacts" Click="btnPickContacts_Click" Margin="0 10 0 0" /> </StackPanel>
</Grid>
</Page>

/*
* 演示如何通过 ContactPicker 选择一个或多个联系人
*
* ContactPicker - 联系人选择窗口
* CommitButtonText - 联系人选择窗口的确定按钮的显示文本，此按钮默认显示的文本为“确定”
* SelectionMode - 选取模式（ContactSelectionMode 枚举）
* Contacts - 请对我提供联系人的全部字段的数据，默认值
* Fields - 请对我提供指定字段的数据
* DesiredFields - 当 SelectionMode.Fields 时，请对我提供指定字段的数据，字段名称来自 KnownContactField 枚举
* PickSingleContactAsync() - 选取一个联系人，返回 ContactInformation 对象
* PickMultipleContactsAsync() - 选取多个联系人，返回 ContactInformation 对象集合
*
* ContactInformation - 联系人信息对象
* Name, Emails, PhoneNumbers, Locations, InstantMessages, CustomFields
* GetThumbnailAsync() - 获取联系人缩略图
*/using System;
using System.Collections.Generic;
using System.Linq;
using Windows.ApplicationModel.Contacts;
using Windows.Storage.Streams;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Media.Imaging;
using XamlDemo.Common;namespace XamlDemo.Picker
{
public sealed partial class ContactPickerDemo : Page
{
public ContactPickerDemo()
{
this.InitializeComponent();
} private async void btnPickContact_Click(object sender, RoutedEventArgs e)
{
if (Helper.EnsureUnsnapped())
{
ContactPicker contactPicker = new ContactPicker();
contactPicker.CommitButtonText = "确定";
contactPicker.SelectionMode = ContactSelectionMode.Contacts; // 启动联系人选取器，以选择一个联系人
ContactInformation contact = await contactPicker.PickSingleContactAsync(); if (contact != null)
{
lblMsg.Text = "name: " + contact.Name;
lblMsg.Text += Environment.NewLine;
lblMsg.Text += "emails: " + string.Join(",", contact.Emails.Select(p => new { email = p.Value }));
lblMsg.Text += Environment.NewLine;
lblMsg.Text += "phoneNumbers: " + string.Join(",", contact.PhoneNumbers.Select(p => new { phoneNumber = p.Value })); IRandomAccessStreamWithContentType stream = await contact.GetThumbnailAsync();
if (stream != null && stream.Size > )
{
BitmapImage bitmap = new BitmapImage();
bitmap.SetSource(stream);
imgThumbnail.Source = bitmap;
}
}
else
{
lblMsg.Text = "取消了";
}
}
} private async void btnPickContacts_Click(object sender, RoutedEventArgs e)
{
if (Helper.EnsureUnsnapped())
{
var contactPicker = new ContactPicker(); // 启动联系人选取器，以选择多个联系人
IReadOnlyList<ContactInformation> contacts = await contactPicker.PickMultipleContactsAsync(); if (contacts != null && contacts.Count > )
{
ContactInformation contact = contacts[]; lblMsg.Text = "contacts count: " + contacts.Count.ToString();
lblMsg.Text += Environment.NewLine;
lblMsg.Text += "first contact name: " + contact.Name;
lblMsg.Text += Environment.NewLine;
lblMsg.Text += "first contact emails: " + string.Join(",", contact.Emails.Select(p => new { email = p.Value }));
lblMsg.Text += Environment.NewLine;
lblMsg.Text += "first contact phoneNumbers: " + string.Join(",", contact.PhoneNumbers.Select(p => new { phoneNumber = p.Value })); IRandomAccessStreamWithContentType stream = await contact.GetThumbnailAsync();
if (stream != null && stream.Size > )
{
BitmapImage bitmap = new BitmapImage();
bitmap.SetSource(stream);
imgThumbnail.Source = bitmap;
}
}
else
{
lblMsg.Text = "取消了";
}
}
}
}
}