Silverlight:动态读取图片或者视频

下面这个小例子演示了如何在Silverlight（或者WPF）中动态读取图片或者视频

 

页面部分

<UserControl x:Class="SilverlightApplication1.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:DesignWidth="640" d:DesignHeight="480">    <StackPanel Name="pl" Orientation="Horizontal" >        <Image Width="100" Height="100" Name="pic">Image>        <Button Name="bt"  Width="100" Height="100" Click="Button_Click">Button>        <MediaElement Name="video" Width="300" Height="300">MediaElement>        <Button Name="bt2" Width="100" Height="100" Click="Button_Click_1">Button>    StackPanel>UserControl>

.csharpcode, .csharpcode pre{font-size: small;color: black;font-family: consolas, "Courier New", courier, monospace;background-color: #ffffff;/*white-space: pre;*/}.csharpcode pre { margin: 0em; }.csharpcode .rem { color: #008000; }.csharpcode .kwrd { color: #0000ff; }.csharpcode .str { color: #006080; }.csharpcode .op { color: #0000c0; }.csharpcode .preproc { color: #cc6633; }.csharpcode .asp { background-color: #ffff00; }.csharpcode .html { color: #800000; }.csharpcode .attr { color: #ff0000; }.csharpcode .alt {background-color: #f4f4f4;width: 100%;margin: 0em;}.csharpcode .lnum { color: #606060; }

代码部分

using System.Windows;using System.Windows.Controls;using System.IO;using System.Windows.Media.Imaging;namespace SilverlightApplication1{    public partial class MainPage : UserControl    {        public MainPage()        {            InitializeComponent();        }        private void Button_Click(object sender, RoutedEventArgs e)        {            OpenFileDialog ofd = new OpenFileDialog();            ofd.Filter = "JPG File|*.JPG";            if ((bool)ofd.ShowDialog())            {                FileStream fs = ofd.File.OpenRead();                BitmapImage image = new BitmapImage();                image.SetSource(fs);                pic.Source = image;            }        }        private void Button_Click_1(object sender, RoutedEventArgs e)        {            OpenFileDialog ofd = new OpenFileDialog();            ofd.Filter = "Video File|*.wmv";            if ((bool)ofd.ShowDialog())            {                video.SetSource(ofd.File.OpenRead());            }        }    }}

效果图

.csharpcode, .csharpcode pre{font-size: small;color: black;font-family: consolas, "Courier New", courier, monospace;background-color: #ffffff;/*white-space: pre;*/}.csharpcode pre { margin: 0em; }.csharpcode .rem { color: #008000; }.csharpcode .kwrd { color: #0000ff; }.csharpcode .str { color: #006080; }.csharpcode .op { color: #0000c0; }.csharpcode .preproc { color: #cc6633; }.csharpcode .asp { background-color: #ffff00; }.csharpcode .html { color: #800000; }.csharpcode .attr { color: #ff0000; }.csharpcode .alt {background-color: #f4f4f4;width: 100%;margin: 0em;}.csharpcode .lnum { color: #606060; }