?????? 在silverlight實際項目中時常會需要播放視頻和打印文檔，在本節中我們將制作一個最簡單的播放視頻和打印文檔的實例。

??????? 一、播放WMV視頻

??????? 首先我們創建一個Silverlight應用程序SLShowVideo，然后放一個示例Wmv視頻在SLShowVideo.web項目的根目錄下面。

??????? 然后我們在Xaml文檔中放入一個MediaElement控件，并寫入以下代碼：

?

<MediaElement?Height="377"?HorizontalAlignment="Left"?Margin="8,31,0,0"?

Name="showVideo"?VerticalAlignment="Top"?Width="583"?/>?

<Button?Content="播?放"?Height="28"?HorizontalAlignment="Left"?Margin="194,428,0,0"?

Name="button1"?VerticalAlignment="Top"?Width="99"?Click="button1_Click_1"?/>?

<Button?Content="暫?停"?Height="28"?HorizontalAlignment="Left"?Margin="333,428,0,0"?

Name="button3"?VerticalAlignment="Top"?Width="99"?Click="button3_Click"?/>?

<Button?Content="停?止"?Height="28"?HorizontalAlignment="Left"?Margin="468,428,0,0"?

Name="button2"?VerticalAlignment="Top"?Width="99"?Click="button2_Click"?/>?

<Button?Content="加載視頻"?Height="28"?HorizontalAlignment="Left"?Margin="57,428,0,0"?

Name="button4"?VerticalAlignment="Top"?Width="99"?Click="button1_Click"/>?

??????? 最后我們寫入以下代碼加載視頻并且控制視頻的播放：

?

#region?播放視頻?

private?void?button1_Click(object?sender,?RoutedEventArgs?e)?

{?

//加載視頻?

this.showVideo.Source?=?new?Uri(GetURL()+"/sampleVideo.wmv");?

}?

///?<summary>?

///?獲取當前網站的Url前綴?

///?</summary>?

///?<returns></returns>?

public?static?string?GetURL()?

{?

ScriptObject?location?=?(HtmlPage.Window.GetProperty("location")?as?ScriptObject);?

object?r?=?location.GetProperty("href");?

string?URL?=?r.ToString().Substring(0,?r.ToString().LastIndexOf('/'));?

//截取到當前SILVERLIGHT程序存放網絡URL的前綴?

return?URL;?

}?

private?void?button3_Click(object?sender,?RoutedEventArgs?e)?

{?

//暫停?

this.showVideo.Pause();?

}?

?

private?void?button2_Click(object?sender,?RoutedEventArgs?e)?

{?

//停止?

this.showVideo.Stop();?

}?

?

private?void?button1_Click_1(object?sender,?RoutedEventArgs?e)?

{?

//播放?

this.showVideo.Play();?

}?

#endregion?

??????? 二、打印文檔

??????? 首先我們看XAML文檔。添加一個Canvas元素，元素內的所有內容就是我們即將要打印（當然你也可以設置打印Grid等元素的內容）。

<Canvas?Height="376"?HorizontalAlignment="Left"?Margin="611,32,0,0"?Name="canvas1"?

VerticalAlignment="Top"?Width="369"?>?

<sdk:Label?Width="85"?Canvas.Left="9"?Content="第一個打印程序"?Canvas.Top="27"?/>?

<sdk:Label?Canvas.Left="11"?Canvas.Top="60"?Height="16"?Content="第二個打印程序"?

Name="label1"?Width="86"?/>?

</Canvas>?

<Button?Content="打印"?Height="34"?HorizontalAlignment="Left"?Margin="747,426,0,0"?

Name="btnPrint"?VerticalAlignment="Top"?Width="110"?Click="btnPrint_Click"?/>?

??????? 在Button事件處理程序中我們添加一下代碼打印Canvas元素。

#region?打印文檔?

PrintDocument?print;?

private?void?btnPrint_Click(object?sender,?RoutedEventArgs?e)?

{?

print?=?new?PrintDocument();?

//添加一個打印頁面事件以設置需要打印的控件?

print.PrintPage?+=?new?EventHandler<PrintPageEventArgs>(print_PrintPage);?

print.Print("canvas1");?

}?

?

void?print_PrintPage(object?sender,?PrintPageEventArgs?e)?

{?

//設置打印this.canvas1的所有內容?

e.PageVisual?=?this.canvas1;?

}?

#endregion?

??????? 本實例采用VS2010+Silverlight 4.0編寫。如需源碼請點擊? SLShowVideo.zip? 下載。期待Silverlight 5 beta的到來。下面我們看實例的效果圖：

轉載于:https://blog.51cto.com/chengxingliang/822567

總結

以上是生活随笔為你收集整理的36.Silverlight中播放视频和打印文档【附带源码实例】的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。