• Windows Phone7屏幕方向与常用控件


    跟林永坚老师学习wp7

    • 屏幕方向(Orientation)
    •  常用控件(Canvas,Grid,StackPanel,TextBlock,Image,MediaElement)

    屏幕方向感应页面(Portraint,LandScape)

    • 在VS里可以新增 Portraint,LandScape的页面;
    • 页面可以支持横屏 竖屏 或者同时支持两者
    • 不能通过代码来改变屏幕方向

    SupportedOrientations表示页面支持的屏幕方向,Orientation代表页面启动的方向;

    可以通过注册事件来实现元素的控制:

    namespace PageNavigation.views
    {
        public partial class About : PhoneApplicationPage
        {
            public About()
            {
                InitializeComponent();
                OrientationChanged += new EventHandler<OrientationChangedEventArgs>(About_OrientationChanged);
            }
    
            void About_OrientationChanged(object sender, OrientationChangedEventArgs e)
            {
                if (e.Orientation == PageOrientation.LandscapeLeft || e.Orientation == PageOrientation.LandscapeRight)
                {
                    TitlePanel.Visibility = Visibility.Collapsed;
                }
                else if(e.Orientation == PageOrientation.PortraitDown || e.Orientation == PageOrientation.PortraitUp)
                {
                    TitlePanel.Visibility = Visibility.Visible;
                }
            }
        }
    }
    

      使用TextBlock来格式化文本:

                <TextBlock Height="183" HorizontalAlignment="Left" Margin="56,126,0,0" Name="textBlock1"  VerticalAlignment="Top" Width="335">
    <LineBreak></LineBreak>
                    <Run Foreground="Beige" FontSize="32">文字一</Run>
                    <LineBreak/>
                       <Run Foreground="Green" FontSize="20">文字2</Run>
                </TextBlock>
    

      Img控件:支持png,jpeg,支持网络文件和本地文件(本地文件的Build Action为content)

         <Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0">
                <Image Height="121" Source="http://cn.bing.com/az/hprichbg?p=rb%2fPipefishes_ZH-CN1693383898.jpg" HorizontalAlignment="Left" Margin="9,6,0,0" Name="image1" Stretch="Fill" VerticalAlignment="Top" Width="398" />
                <Image Height="350" Source="/pictures/DSCF0885.JPG" HorizontalAlignment="Left" Margin="6,154,0,0" Name="image2" Stretch="Fill" VerticalAlignment="Top" Width="462" />
            </Grid>
    

      UI布局控件比较:

    •  Canvas绝对定位控件,速度快,
    • Grid网格定位,
    • StackPanel自动定位控件

    在使用canvas的时候往往会出现竖屏的时候是完整的,横屏的时候就会缺少元素的情况,这里有两个解决办法,一是通过注册事件,二是通过使用ScrollViewer;

     public partial class Picture : PhoneApplicationPage
        {
            public Picture()
            {
                InitializeComponent();
                OrientationChanged += new EventHandler<OrientationChangedEventArgs>(Picture_OrientationChanged);
            }
    
            void Picture_OrientationChanged(object sender, OrientationChangedEventArgs e)
            {
                if (e.Orientation == PageOrientation.LandscapeLeft || e.Orientation == PageOrientation.LandscapeRight)
                {
                    Canvas.SetTop(button1, 200);
                }
                else if (e.Orientation == PageOrientation.PortraitDown || e.Orientation == PageOrientation.PortraitUp)
                {
                    Canvas.SetTop(button1,466);
                }
            }
        }
    

      Stackpanel控件:自动定位控件,不能指定具体子控件的布局;

    可以通过注册事件调整子控件的方向

     if (e.Orientation == PageOrientation.LandscapeLeft || e.Orientation == PageOrientation.LandscapeRight)
                {
                    stackpaneltest.Orientation = System.Windows.Controls.Orientation.Horizontal;
                }
                else if (e.Orientation == PageOrientation.PortraitDown || e.Orientation == PageOrientation.PortraitUp)
                {
                    stackpaneltest.Orientation = System.Windows.Controls.Orientation.Vertical;
                }
    

      Grid控件:优点容易支持翻屏的控件布局

    注册事件的代码

      if (e.Orientation == PageOrientation.LandscapeLeft || e.Orientation == PageOrientation.LandscapeRight)
                {
                    Grid.SetRow(stackpaneltest1, 0);
                    Grid.SetColumn(stackpaneltest1, 1);
                }
                else if (e.Orientation == PageOrientation.PortraitDown || e.Orientation == PageOrientation.PortraitUp)
                {
                    Grid.SetRow(stackpaneltest1, 1);
                    Grid.SetColumn(stackpaneltest1, 0);
                }
    

      MediaElement控件支持音频和视频,支持网络文件和本地文件,如果文件时本地文件,builaction设置为content

      mediaElement1.AutoPlay = true;
                mediaElement1.Source = new Uri("/vedio/my girl - 爱上鲨鱼的人鱼.mp3", UriKind.RelativeOrAbsolute);
                mediaElement1.Volume = 10;
                mediaElement1.Position = TimeSpan.FromMilliseconds(0);
                mediaElement1.Play();
    

    代码下载   

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  • 原文地址:https://www.cnblogs.com/LittleFeiHu/p/2370382.html
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