Windows Phone开发（24）：启动器与选择器之发送短信

本节我们通过一个简单的发送短信示例来演示一下如果配合使用PhoneNumberChooserTask和SmsComposeTask类。

PhoneNumberChooserTask是选择器，它用于从你的电话簿里选择你要发送短信的电话号码；

SmsComposeTask就是用来启动发送短信组件并显示发送窗口。

注意，这些操作都在用户的操控之中，发送短信一定会显示可视化页面的，而且不会偷偷地在后台发送，因为Windows phone是以用户体验和安全为原则的，后台发送是不允许的，而且发送过程是由用户控制的，你可以选择取消或退出。

SmsComposeTask类的To属性就是目标电话号码，Body就是你要发送的短信的正文。

同样，你会很轻松地就完成这个任务，不信，看看代码吧。

<phone:PhoneApplicationPage
x:Class="SMSSample.MainPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone"
xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d" d:DesignWidth="480" d:DesignHeight="768"
FontFamily="{StaticResource PhoneFontFamilyNormal}"
FontSize="{StaticResource PhoneFontSizeNormal}"
Foreground="{StaticResource PhoneForegroundBrush}"
SupportedOrientations="Portrait" Orientation="Portrait"
shell:SystemTray.IsVisible="True">

<!--LayoutRoot 是包含所有页面内容的根网格-->
<Grid x:Name="LayoutRoot" Background="Transparent">
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>

<!--TitlePanel 包含应用程序的名称和页标题-->
<StackPanel x:Name="TitlePanel" Grid.Row="0" Margin="12,17,0,28">
<TextBlock x:Name="ApplicationTitle" Text="我的应用程序" Style="{StaticResource PhoneTextNormalStyle}"/>
<TextBlock x:Name="PageTitle" Text="发送短信" Margin="9,-7,0,0" Style="{StaticResource PhoneTextTitle1Style}"/>
</StackPanel>

<!--ContentPanel - 在此处放置其他内容-->
<Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0">
<TextBlock Height="40" HorizontalAlignment="Left" Margin="33,69,0,0" Name="textBlock1" Text="接收者：" VerticalAlignment="Top" FontSize="30" Width="144" />
<TextBox Height="72" HorizontalAlignment="Left" Margin="12,116,0,0" Name="txtPhoneNumber" Text="" VerticalAlignment="Top" Width="418" >
<TextBox.InputScope>
<InputScope>
<InputScopeName NameValue="Number"/>
</InputScope>
</TextBox.InputScope>
</TextBox>
<TextBlock FontSize="30" Height="40" HorizontalAlignment="Left" Margin="33,235,0,0" Name="textBlock2" Text="短信内容：" VerticalAlignment="Top" Width="213" />
<TextBox Height="233" HorizontalAlignment="Left" Margin="12,283,0,0" Name="txtMessage" Text="" VerticalAlignment="Top" Width="418" TextWrapping="Wrap" />
<Button Content="发送" Height="79" HorizontalAlignment="Left" Margin="48,522,0,0" Name="btnSend" VerticalAlignment="Top" Width="357" Click="btnSend_Click" />
<Button Content="选择电话号码" Height="72" HorizontalAlignment="Left" Margin="185,45,0,0" Name="btnChoose" VerticalAlignment="Top" Width="220" Click="btnChoose_Click" />
</Grid>
</Grid>

</phone:PhoneApplicationPage>

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using Microsoft.Phone.Controls;

using Microsoft.Phone.Tasks;

namespace SMSSample
{
public partial class MainPage : PhoneApplicationPage
{
PhoneNumberChooserTask myChooser = new PhoneNumberChooserTask();
SmsComposeTask SMS = null;

// 构造函数
public MainPage()
{
InitializeComponent();
// 实例化
SMS = new SmsComposeTask();
// 注册回调事件
myChooser.Completed += (sender, e) => {
if (e.TaskResult== TaskResult.OK)
{
Dispatcher.BeginInvoke(() => { this.txtPhoneNumber.Text = e.PhoneNumber; });
}
};
}

// 选择联系人
private void btnChoose_Click(object sender, RoutedEventArgs e)
{
if (myChooser == null)
{
myChooser = new PhoneNumberChooserTask();
}
myChooser.Show();
}

// 发送
private void btnSend_Click(object sender, RoutedEventArgs e)
{
if (txtPhoneNumber.Text == "" || txtMessage.Text == "")
{
MessageBox.Show("接收号码和短信内容不能为空。");
return;
}
if (SMS == null)
{
SMS = new SmsComposeTask();
}
// 赋值
SMS.To = txtPhoneNumber.Text;
SMS.Body = txtMessage.Text;

try
{
SMS.Show();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
}
}