Windows Phone 学习 直接保存联系人到手机上

  <Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0">            <StackPanel>                <TextBlock>输入要保存的电话号码：</TextBlock>                <TextBox Name="txtPhoneNo">                    <TextBox.InputScope>                        <InputScope>                            <InputScopeName NameValue="NameOrPhoneNumber"/>                        </InputScope>                    </TextBox.InputScope>                </TextBox>                <Button Content="确定" Click="onOK" HorizontalAlignment="Left"/>            </StackPanel>        </Grid>

  public MainPage()        {            InitializeComponent();            MyTask = new SavePhoneNumberTask();            MyTask.Completed += new EventHandler<TaskEventArgs>(MyTask_Completed);        }        void MyTask_Completed(object sender, TaskEventArgs e)        {            // 检测是否出错            if (e.Error!= null)            {                MessageBox.Show("错误：\n" + e.Error.Message);                return;            }            switch (e.TaskResult)            {                case TaskResult.Cancel:                    break;                case TaskResult.None:                    break;                case TaskResult.OK:                    MessageBox.Show("保存成功。");                    break;                default:                    break;            }        }        private void onOK(object sender, RoutedEventArgs e)        {            if (txtPhoneNo.Text != "")            {                MyTask.PhoneNumber = txtPhoneNo.Text;                MyTask.Show();            }        }