Windows Phone 学习 直接在程序中发电子邮件

 <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="发邮件" 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">
            <StackPanel>
                <TextBlock>收件人：</TextBlock>
                <TextBox Name="txtAddr">
                    <TextBox.InputScope>
                        <InputScope>
                            <InputScopeName NameValue="EmailNameOrAddress"/>
                        </InputScope>
                    </TextBox.InputScope>
                </TextBox>
                <TextBlock Margin="0,15,0,0">标题:</TextBlock>
                <TextBox Name="txtSubject"/>
                <TextBlock Margin="0,15,0,0">正文：</TextBlock>
                <TextBox Name="txtBody" Height="200" VerticalScrollBarVisibility="Auto" HorizontalScrollBarVisibility="Disabled"/>
                <Button Margin="0,5,0,0" Content="确定" HorizontalAlignment="Left" Click="btnOK_Click"/>
            </StackPanel>
        </Grid>
    </Grid>

  private void btnOK_Click(object sender, RoutedEventArgs e)
        {
            if (txtAddr.Text == "")
            {
                MessageBox.Show("请输入收件人地址。");
                return;
            }
            if (txtSubject.Text == "")
            {
                MessageBox.Show("请输入邮件标题。");
                return;
            }
            // 1、实例化
            EmailComposeTask MyEmail = new EmailComposeTask();
            // 2、设置相关属性
            MyEmail.To = txtAddr.Text;
            MyEmail.Subject = txtSubject.Text;
            MyEmail.Body = txtBody.Text;
            // 3、显示启动器
            MyEmail.Show();
        }