Windows Phone开发（24）：启动器与选择器之发送短信

原文: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);
            }
        }
    }
}