13-常用控件之滚动内容控件ScrollViewer

1.ScrollViewer使应用程序内容具有滚动功能。

2.XAML语法

         <ScrollViewer...../>

         <ScrollViewer>内容</ScrollViewer>

3.重要的属性：HorizontalScrollBarVisibility   VerticalScrollBarVisibility 

                            使内容可以水平滚动                 垂直滚动

4.实例：使用计时器让图片可以在屏幕中滚动。

5.实现代码

<phone:PhoneApplicationPage 
    x:Class="PhoneApp1.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="页面名称" 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">
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="124*" />
                <ColumnDefinition Width="332*" />
            </Grid.ColumnDefinitions>
            <ScrollViewer Height="283" HorizontalAlignment="Left" Margin="15,87,0,0" Name="scrollViewer1" VerticalAlignment="Top" Width="424" HorizontalScrollBarVisibility="Hidden" Grid.ColumnSpan="2">
                <StackPanel Height="902" Name="stackPanel1" Width="273" />
            </ScrollViewer>
            
            <Button Content="向上" Height="72" HorizontalAlignment="Left" Margin="34,410,0,0" Name="button1" VerticalAlignment="Top" Width="160" Click="button1_Click" Grid.ColumnSpan="2" />
            <Button Content="停止" Height="72" HorizontalAlignment="Left" Margin="112,410,0,0" Name="button2" VerticalAlignment="Top" Width="160" Click="button2_Click" Grid.Column="1" />
        </Grid>
    </Grid>

    <!--演示 ApplicationBar 用法的示例代码-->
    <!--<phone:PhoneApplicationPage.ApplicationBar>
        <shell:ApplicationBar IsVisible="True" IsMenuEnabled="True">
            <shell:ApplicationBarIconButton IconUri="/Images/appbar_button1.png" Text="按钮 1"/>
            <shell:ApplicationBarIconButton IconUri="/Images/appbar_button2.png" Text="按钮 2"/>
            <shell:ApplicationBar.MenuItems>
                <shell:ApplicationBarMenuItem Text="菜单项 1"/>
                <shell:ApplicationBarMenuItem Text="菜单项 2"/>
            </shell:ApplicationBar.MenuItems>
        </shell:ApplicationBar>
    </phone:PhoneApplicationPage.ApplicationBar>-->

</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 System.Windows.Media.Imaging;
using System.Windows.Threading;

namespace PhoneApp1
{
    public partial class MainPage : PhoneApplicationPage
    {

        DispatcherTimer dispatcherTimer = new DispatcherTimer();
        // 构造函数
        public MainPage()
        {
            InitializeComponent();

            //设置计时器的间隔时间
            dispatcherTimer.Interval = new TimeSpan(500);
            //设置计时器的Tick方法，超过500之后调用这个方法
            dispatcherTimer.Tick += new EventHandler(dispatcherTimer_Tick);


            //添加图片到ScorollView里面的StackPanel中
            for (int i = 0; i <4; i++)
            {
                //创建一个Image对象
                Image imgItem = new Image();
                //设置图片的宽度和高度
                imgItem.Width = 200;
                imgItem.Height = 200;
                //4张图片循环添加到StackPanel的子节点上
                if (i % 4 == 0)
                {
                    //设置Image对象的Source属性，指定放入图片的位置
                    imgItem.Source = (new BitmapImage(new Uri("a.jpg", UriKind.Relative)));
                }
                else if (i % 4 == 1)
                {

                    imgItem.Source = (new BitmapImage(new Uri("b.jpg", UriKind.Relative)));
                }
                else if (i % 4 == 2)
                {
                    imgItem.Source = (new BitmapImage(new Uri("c.jpg", UriKind.Relative)));
                }
                else
                {
                    imgItem.Source = (new BitmapImage(new Uri("d.jpg", UriKind.Relative)));
                }
                //向stackPanel中依次添加图片
                this.stackPanel1.Children.Add(imgItem);
            }
        }

        //超过时间间隔后调用的方法
        void dispatcherTimer_Tick(object sender, EventArgs e)
        {
            //ScrollToVerticalOffset方法将内容垂直方向滚动
            scrollViewer1.ScrollToVerticalOffset(scrollViewer1.VerticalOffset + 1);
        }
        //点击启动按钮的时候触发的方法，图片从上到下滚动
        private void button1_Click(object sender, RoutedEventArgs e)
        {
            //开始计时器
            dispatcherTimer.Start();
        }
        //点击停止按钮的时候触发的方法，图片停止
        private void button2_Click(object sender, RoutedEventArgs e)
        {
            //停止计时器
            dispatcherTimer.Stop();
        }


    }
}