<UserControl x:Class="HelloSilverlight.MainPage"    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"    mc:Ignorable="d"    d:DesignHeight="300" d:DesignWidth="400" xmlns:sdk="http://schemas.microsoft.com/winfx/2006/xaml/presentation/sdk">    <Grid x:Name="LayoutRoot" Background="Beige" ShowGridLines="True">        <Grid.RowDefinitions>            <RowDefinition Height="40"/>            <RowDefinition Height="220"/>            <RowDefinition Height="40"/>        </Grid.RowDefinitions>        <Grid.ColumnDefinitions>            <ColumnDefinition Width="75" />            <ColumnDefinition Width="325"/>        </Grid.ColumnDefinitions>        <TextBlock  Text="姓名:" Grid.Row="0" Grid.Column="0"></TextBlock>        <TextBlock  Text="日期:" Grid.Row="1" Grid.Column="0"></TextBlock>        <TextBlock x:Name="message1" Text="消息:" Grid.Row="2" Grid.Column="0"            Grid.ColumnSpan="2"></TextBlock>        <TextBox x:Name="name1" Text="你的名字" Grid.Row="0" Grid.Column="1"            Width="150" HorizontalAlignment="Left"></TextBox>        <StackPanel Grid.Column="1" Grid.Row="1" Orientation="Vertical">            <sdk:Calendar x:Name="cal1" SelectionMode="SingleDate" HorizontalAlignment="Left"></sdk:Calendar>            <Button Click="Button_Click" x:Name="OKbutton" Width="75" Height="25"                HorizontalAlignment="Left" Content="显示"></Button>        </StackPanel>    </Grid></UserControl>

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;namespace HelloSilverlight{    public partial class MainPage : UserControl    {        public MainPage()        {            InitializeComponent();        }        #region 显示事件        private void Button_Click(object sender, RoutedEventArgs e)        {            string dateString;            if (cal1.SelectedDate == null)            {                dateString = "请选择一个日期!";            }            else            {                dateString = cal1.SelectedDate.ToString();            }            message1.Text = "你好! " + name1.Text + "\n" +                "选择的日期是: " + dateString;        }         #endregion    }}