xaml:
<UserControl x:Class="SLCenterLayout.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" x:Name="ControlMainPage" > <UserControl.Resources> </UserControl.Resources> <UserControl.RenderTransform> <CompositeTransform /> </UserControl.RenderTransform> <ScrollViewer x:Name="LayoutRoot" MaxWidth="1300" MaxHeight="685"VerticalScrollBarVisibility="Auto" HorizontalScrollBarVisibility="Auto" Background="Black"> <Grid HorizontalAlignment="Center"> <Grid.RowDefinitions> <RowDefinition /> <RowDefinition /> </Grid.RowDefinitions> <Image Source="2.jpg"/> <TextBlock Grid.Row="1" FontSize="30" Foreground="White">小米手机快发货啊</TextBlock> </Grid> </ScrollViewer> </UserControl>
xaml.cs:
using System; using System.Windows.Controls; using System.Windows.Media; namespace SLCenterLayout { public partial class MainPage : UserControl { //标准显示宽度 private const double RECOMMAND_SCREEN_WIDTH = 1300; //标准显示高度 private const double RECOMMAND_SCREEN_HEIGHT = 685; public MainPage() { InitializeComponent(); App.Current.Host.Content.Resized+=new EventHandler(Content_Resized); } private void ChangePageRenderSize(double currentWidth, double currentHeight) { if (currentWidth > RECOMMAND_SCREEN_WIDTH || currentHeight > RECOMMAND_SCREEN_HEIGHT) { CompositeTransform ctf = new CompositeTransform(); ctf.ScaleX = currentWidth / RECOMMAND_SCREEN_WIDTH; ctf.ScaleY = currentHeight / RECOMMAND_SCREEN_HEIGHT; //沿着中心点进行缩放,这样的话,在多次缩放后,不会偏移原来位置 ctf.CenterX = currentWidth / 2; ctf.CenterY = currentHeight / 2; ControlMainPage.RenderTransform = ctf; } } private void Content_Resized(object sender, EventArgs e) { ChangePageRenderSize(ControlMainPage.ActualWidth, ControlMainPage.ActualHeight); } }
说明:Resized事件:因为我们在对页面缩放的时候,很重要的一对数据就是当前页面的宽度和高度,而这对数据,我们可以在Resized事件里面获得
MSDN关于Resized事件的阐述是:
此事件将在开始加载 Silverlight 插件过程中发生。在发生该事件后,ActualHeight 或 ActualWidth 的值是可靠的。在这一时刻之前,ActualHeight 或 ActualWidth 的值不可靠。
http://blog.csdn.net/hemingliang1987/article/details/8646669