Silverlight中Image控件Stretch属性的四种值比较
通过设置Image控件Stretch属性的值可以控制图片的显示形式:
包含的值:None、Fill、Uniform、UniformToFill
View Code
<Grid x:Name="LayoutRoot" Background="White" Height="489" Width="603"> <Image Height="150" HorizontalAlignment="Left" Name="image1" Stretch="None" VerticalAlignment="Top" Width="200" Source="/SilverlightApplication1;component/Images/2009011911345229.jpg" Margin="10,14,0,0" /> <Image Height="150" HorizontalAlignment="Left" Margin="325,14,0,0" Name="image2" Stretch="Fill" VerticalAlignment="Top" Width="200" Source="/SilverlightApplication1;component/Images/2009011911345229.jpg" Grid.ColumnSpan="3" /> <Image Height="150" HorizontalAlignment="Left" Margin="10,239,0,0" Name="image3" Stretch="Uniform" VerticalAlignment="Top" Width="200" Source="/SilverlightApplication1;component/Images/2009011911345229.jpg" /> <Image Height="150" HorizontalAlignment="Left" Margin="325,239,0,0" Name="image4" Stretch="UniformToFill" VerticalAlignment="Top" Width="200" Source="/SilverlightApplication1;component/Images/2009011911345229.jpg" Grid.ColumnSpan="3" /> <TextBlock Height="67" HorizontalAlignment="Left" Margin="12,166,0,0" Name="textBlock1" VerticalAlignment="Top" Width="207" TextWrapping="Wrap"> <TextBlock.Text> None:图片直接加载到Image控件中,不进行拉伸,如果Image控件的大小是100X100 而图片的大小为1000X1000 则只显示顶部的100X100 </TextBlock.Text> </TextBlock> <TextBlock Height="67" HorizontalAlignment="Left" Margin="325,166,0,0" Name="textBlock2" VerticalAlignment="Top" Width="200" TextWrapping="Wrap" Grid.ColumnSpan="3"> <TextBlock.Text> Fill:图片会拉伸或缩小以适应Image控件 长宽比可能改变 </TextBlock.Text> </TextBlock> <TextBlock Height="67" HorizontalAlignment="Left" Margin="12,395,0,0" Name="textBlock3" TextWrapping="Wrap" VerticalAlignment="Top" Width="200" > <TextBlock.Text> Uniform:图片会拉伸到最佳大小(不一定充满整个Image控件)保持长宽比不变 </TextBlock.Text> </TextBlock> <TextBlock Height="67" HorizontalAlignment="Left" Margin="325,395,0,0" Name="textBlock4" VerticalAlignment="Top" Width="200" TextWrapping="Wrap" Grid.ColumnSpan="3"> UniformToFill:图片会在不改变长宽比的前提下拉伸,它会充满整个Image控件 但可能被裁减 </TextBlock> </Grid>
再来看看效果:
使用的图片是220X220 Image控件是200x150 通过上面的显示效果就可以一目了然啦
None:显示200x150 它从图片的顶点看是截取Image控件大小的图片显示;
Fill:显示200x150的图片长宽都在相应的压缩(拉伸)但不一定成比例;
Uniform:显示150X150的图片 相当于按比例拉伸但不一定充满控件;
UniformToFill:显示200X150的图片 按比例充满Image控件