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();