我正在使用VSTS2008 + C＃创建基于ASP.Net Web应用程序的Silverlight应用程序。我只在默认的page.xaml中添加一行来托管本地视频，
以下是XAML的内容，我希望它根据与网页上显示区域相关的视频宽高比进行缩放，因此我选择Stretch =“Uniform”。
我做的另一个修改是默认自动生成的aspx测试页面，通过明确指定宽度和高度（120 * 120）。我的问题是我发现只能显示部分视频。我的视频原始大小是1024 * 768，我想如果我使用Uniform Stretch，无论分配给Silverlight控件的网页大小是多少，视频都可以缩放并显示所有内容。怎么了？
BTW：我测试过我是否使用512 * 384或256 * 192这样的尺寸，可以显示所有视频内容，证明均匀拉伸不起作用？aspx测试页面部分代码更改，
<asp:Silverlight ID="Xaml1" runat="server" Source="~/ClientBin/SilverlightApplication1.xap" MinimumVersion="2.0.31005.0" Width="120" Height="120" />
这是page.xaml代码，我刚刚添加了一个mediaelement。
<UserControl x:Class="SilverlightApplication1.Page"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Width="400" Height="300">
<Grid x:Name="LayoutRoot" Background="White">
<MediaElement Source="screen.wmv" Stretch="Uniform" />
</Grid>
</UserControl>
编辑1：
使用sl2viedoplayer（http://sl2videoplayer.codeplex.com/）时遇到了同样的问题，即使删除了usercontrol的大小，也只能显示部分视频。有什么想法有什么不对？这是sl2videoplayer和相关xaml文件的测试代码的html部分。
<UserControl x:Class="VideoPlayer.Page"
xmlns="http://schemas.microsoft.com/client/2007"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:VideoPlayer="clr-namespace:VideoPlayer" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d" d:DesignWidth="610.369" d:DesignHeight="413">
<UserControl.Resources>
<Storyboard x:Name="controlsIn">
<DoubleAnimation BeginTime="00:00" Storyboard.TargetName="controlsContainer" From="0" To="1" Storyboard.TargetProperty="Opacity" />
<DoubleAnimationUsingKeyFrames Storyboard.TargetName="controlsContainer" Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[3].(TranslateTransform.Y)" BeginTime="00:00:00">
<SplineDoubleKeyFrame KeyTime="00:00:00.5000000" Value="-40"/>
<SplineDoubleKeyFrame KeyTime="00:00:00.7000000" Value="-35"/>
</DoubleAnimationUsingKeyFrames>
</Storyboard>
<Storyboard x:Name="controlsOut">
<DoubleAnimation BeginTime="00:00" Storyboard.TargetName="controlsContainer" From="1" To="0" Storyboard.TargetProperty="Opacity" />
<DoubleAnimationUsingKeyFrames Storyboard.TargetName="controlsContainer" Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[3].(TranslateTransform.Y)" BeginTime="00:00:00">
<SplineDoubleKeyFrame KeyTime="00:00:00" Value="-35"/>
<SplineDoubleKeyFrame KeyTime="00:00:00.5000000" Value="0"/>
</DoubleAnimationUsingKeyFrames>
</Storyboard>
</UserControl.Resources>
<Grid x:Name="LayoutRoot">
<Canvas x:Name="PlayIcon" Width="100" Height="100" Canvas.ZIndex="99" Cursor="Hand" MouseLeftButtonUp="PlayIcon_MouseLeftButtonUp">
<Path Width="100" Height="100" Canvas.Left="0" Canvas.Top="0" Stretch="Fill" Fill="#77000000" Data="F1 M 15,0L 85,0C 93.2843,0 100,6.71573 100,15L 100,85C 100,93.2843 93.2843,100 85,100L 15,100C 6.71573,100 0,93.2843 0,85L 0,15C 0,6.71573 6.71573,0 15,0 Z "/>
<Path Width="40.8182" Height="47.1328" Canvas.Left="34.6439" Canvas.Top="27.6003" Stretch="Fill" Fill="#FFFFFFFF" Data="F1 M 75.4621,51.1667L 34.6439,27.6003L 34.6439,74.7331L 75.4621,51.1667 Z "/>
</Canvas>
<Canvas x:Name="LargeSpinnerArea" Width="100" Height="100" Canvas.ZIndex="100" Visibility="Collapsed">
<StackPanel Orientation="Vertical" HorizontalAlignment="Center">
<VideoPlayer:spinner x:Name="BigBuffer" Width="100" Height="100" RenderTransformOrigin="0.5,0.5" >
<VideoPlayer:spinner.RenderTransform>
<TransformGroup>
<ScaleTransform ScaleX="4" ScaleY="4"/>
<SkewTransform/>
<RotateTransform/>
<TranslateTransform/>
</TransformGroup>
</VideoPlayer:spinner.RenderTransform>
</VideoPlayer:spinner>
</StackPanel>
</Canvas>
<Canvas x:Name="Thumbnail" Canvas.Top="0" Canvas.Left="0" Visibility="Collapsed" Canvas.ZIndex="98">
<Image x:Name="ThumbnailImage" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Stretch="UniformToFill" />
</Canvas>
<StackPanel x:Name="LayoutRoot2" Margin="0" Background="#FF0D0A0A" Cursor="Hand" HorizontalAlignment="Stretch" VerticalAlignment="Stretch">
<MediaElement HorizontalAlignment="Stretch" Margin="0,0,0,0" x:Name="mediaPlayer" Stretch="Uniform" VerticalAlignment="Stretch" AutoPlay="False"/>
<Grid Margin="-1,0,0,0" x:Name="controlsContainer" Height="35" RenderTransformOrigin="0.5,0.5">
<Grid.RenderTransform>
<TransformGroup>
<ScaleTransform/>
<SkewTransform/>
<RotateTransform/>
<TranslateTransform Y="0"/>
</TransformGroup>
</Grid.RenderTransform>
<Rectangle Margin="0,0,0,0" Height="35" VerticalAlignment="Top" Fill="#97000000" Stroke="#00000000" RenderTransformOrigin="0.5,0.5"/>
<VideoPlayer:mediaControl Height="35" Margin="1,0,2,0" HorizontalAlignment="Stretch" VerticalAlignment="Top" x:Name="mediaControls" RenderTransformOrigin="0.5,0" Visibility="Visible"/>
</Grid>
</StackPanel>
</Grid>
</UserControl>
html code,
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<!-- saved from url=(0014)about:internet -->
<head>
<title>Silverlight Project Test Page </title>
<style type="text/css">
html, body {
height: 100%;
overflow: auto;
}
body {
padding: 0;
margin: 0;
}
#silverlightControlHost {
height: 100%;
}
</style>
<script type="text/javascript">
function onSilverlightError(sender, args) {
var appSource = "";
if (sender != null && sender != 0) {
appSource = sender.getHost().Source;
}
var errorType = args.ErrorType;
var iErrorCode = args.ErrorCode;
var errMsg = "Unhandled Error in Silverlight 2 Application " + appSource + "\n" ;
errMsg += "Code: "+ iErrorCode + " \n";
errMsg += "Category: " + errorType + " \n";
errMsg += "Message: " + args.ErrorMessage + " \n";
if (errorType == "ParserError")
{
errMsg += "File: " + args.xamlFile + " \n";
errMsg += "Line: " + args.lineNumber + " \n";
errMsg += "Position: " + args.charPosition + " \n";
}
else if (errorType == "RuntimeError")
{
if (args.lineNumber != 0)
{
errMsg += "Line: " + args.lineNumber + " \n";
errMsg += "Position: " + args.charPosition + " \n";
}
errMsg += "MethodName: " + args.methodName + " \n";
}
throw new Error(errMsg);
}
</script>
</head>
<body>
<!-- Runtime errors from Silverlight will be displayed here.
This will contain debugging information and should be removed or hidden when debugging is completed -->
<div id='errorLocation' style="font-size: small;color: Gray;"></div>
<div id="silverlightControlHost">
<object data="data:application/x-silverlight," type="application/x-silverlight-2" width="500" height="240">
<param name="source" value="ClientBin/VideoPlayer.xap"/>
<param name="onerror" value="onSilverlightError" />
<param name="background" value="white" />
<param name="initParams" value="cc=true,markers=true,markerpath=markers_movie21.xml,m=http://www.sonypictures.com/movies/21/video/trailer/21_trailer_high.asx" />
<a href="http://go.microsoft.com/fwlink/?LinkID=115261" style="text-decoration: none;">
<img src="http://go.microsoft.com/fwlink/?LinkId=108181" alt="Get Microsoft Silverlight" style="border-style: none"/>
</a>
</object>
<iframe style='visibility:hidden;height:0;width:0;border:0px'></iframe>
</div>
</body>
</html>
答案 0 :(得分：2)
问题是你的元素有Width =“120”Height =“120” 并且您的Silverlight控件的固定大小为400 x 300 如果从UserControl中取出Width和Height属性，它应该按预期工作。