Silverlight是什么

Silverlight 是Microsoft推出的一项全新的跨平台与跨浏览器的客户端技术,能设计与开发出具备丰富多媒体效果的可交互WEB程序.简单的几句代码就能快速的展示出非凡的效果.大家可以尝试以下代码,感受一下Silverlight的效果:

使用说明:代码直接来自奚江华的<Silverlight 完美入门>一书,总共五个文件,Test.html / Test.xaml / Silverlight.js / Test.html.js / Test.xaml.js 可以看到,Silverlight的技术新在Test.xaml里面,其他的html和javascript技术都是我们之前已经有的,所以大家不需要那么害怕Silverlight.Test.xaml里面的代码也有限,看下图:(实际上不是三个黄色的小球,而是一个黄色小球从左上角渐变出来,图片显示的小黄球运动和变化的轨迹)

如果不用Silverlight,大家估计只能用FLASH或者图片GIF来设计了,现在有了Silverlight,几句代码就可以实现.好了,下面大家可以把代码拷贝下来,五个文件存到同一目录下,然后打开Test.html,即可看到Silverlight的效果.

代码不需要看懂,只要知道以下几点:

1)许多2D和绚目的效果,以前HTML等语言无法实现,只能借助FLASH和PHTOTOSHOP特别处理过的效果,现在Silverlight用代码就可以实现,且易于搜索引擎的收录.

2)Silverlight并不复杂,涉及到的新技术只有XAML,其他的HTML,JAVASCRITP,DOM等都是老面孔.

3)无论asp/asp.net/php/jsp网站都可以和Silverlight完美的结合使用,没有"门户"之见.(实验过下面的小例子大家应该就能感受到),因为Silverlight是客户端程序,不在服务器端,这点非常重要.

4)浏览Silverlight站,需要安装Silverlight客户端程序,大家可以到 http://www.microsotf.com/silverlight/install.aspx 会自动检测你的电脑是否具备浏览Silverlight站的功能,如果不可以会提示Install Now,大家安装就是了,类似于打开含有FLASH的网站需要装FLASH播放插件一样.

好啦,大家先来试试看,自己的第一个Silverlight程序!!!

Silverlight.js(包含用于下载和实例化 Silverlight 控件的代码)

if(!window.Silverlight)window.Silverlight=

{};Silverlight._silverlightCount=0;Silverlight.ua=null;Silverlight.available=false;Silverlight.fwlinkRoot="http://go.microso

ft.com/fwlink/?LinkID=";Silverlight.StatusText="Get Microsoft

Silverlight";Silverlight.EmptyText="";Silverlight.detectUserAgent=function(){var

a=window.navigator.userAgent;Silverlight.ua={OS:"Unsupported",Browser:"Unsupported"};if(a.indexOf("Windows NT")>=0)

Silverlight.ua.OS="Windows";else if(a.indexOf("PPC Mac OS X")>=0)Silverlight.ua.OS="MacPPC";else if(a.indexOf("Intel Mac OS

X")>=0)Silverlight.ua.OS="MacIntel";if(Silverlight.ua.OS!="Unsupported")if(a.indexOf("MSIE")>=0){if

(navigator.userAgent.indexOf("Win64")==-1)if(parseInt(a.split("MSIE")[1])>=6)Silverlight.ua.Browser="MSIE"}else if

(a.indexOf("Firefox")>=0){var b=a.split("Firefox/")[1].split("."),c=parseInt(b[0]);if(c>=2)

Silverlight.ua.Browser="Firefox";else{var d=parseInt(b[1]);if(c==1&&d>=5)Silverlight.ua.Browser="Firefox"}}else if

(a.indexOf("Safari")>=0)Silverlight.ua.Browser="Safari"};Silverlight.detectUserAgent();Silverlight.isInstalled=function(d)

{var c=false,a=null;try{var b=null;if(Silverlight.ua.Browser=="MSIE")b=new ActiveXObject("AgControl.AgControl");else if

(navigator.plugins["Silverlight Plug-In"]){a=document.createElement("div");document.body.appendChild(a);a.innerHTML='<embed

type="application/x-silverlight" />';b=a.childNodes[0]}if(b.IsVersionSupported(d))c=true;b=null;Silverlight.available=true}

catch(e){c=false}if(a)document.body.removeChild(a);return c};Silverlight.createObject=function(l,g,m,j,k,i,h){var b=

{},a=j,c=k;a.source=l;b.parentElement=g;b.id=Silverlight.HtmlAttributeEncode(m);b.width=Silverlight.HtmlAttributeEncode

(a.width);b.height=Silverlight.HtmlAttributeEncode(a.height);b.ignoreBrowserVer=Boolean

(a.ignoreBrowserVer);b.inplaceInstallPrompt=Boolean(a.inplaceInstallPrompt);var e=a.version.split(".");b.shortVer=e[0]

+"."+e[1];b.version=a.version;a.initParams=i;a.windowless=a.isWindowless;a.maxFramerate=a.framerate;for(var d in c)if(c[d]

&&d!="onLoad"&&d!="onError"){a[d]=c[d];c[d]=null}delete a.width;delete a.height;delete a.id;delete a.onLoad;delete

a.onError;delete a.ignoreBrowserVer;delete a.inplaceInstallPrompt;delete a.version;delete a.isWindowless;delete

a.framerate;if(Silverlight.isInstalled(b.version)){if(Silverlight._silverlightCount==0)if(window.addEventListener)

window.addEventListener("onunload",Silverlight.__cleanup,false);else window.attachEvent

("onunload",Silverlight.__cleanup);var

f=Silverlight._silverlightCount++;a.onLoad="__slLoad"+f;a.onError="__slError"+f;window[a.onLoad]=function(a){if(c.onLoad)

c.onLoad(document.getElementById(b.id),h,a)};window[a.onError]=function(a,b){if(c.onError)c.onError(a,b);else

Silverlight.default_error_handler(a,b)};slPluginHTML=Silverlight.buildHTML(b,a)}else

slPluginHTML=Silverlight.buildPromptHTML(b);if(b.parentElement)b.parentElement.innerHTML=slPluginHTML;else return

slPluginHTML};Silverlight.supportedUserAgent=function(){var

a=Silverlight.ua,b=a.OS=="Unsupported"||a.Browser=="Unsupported"||a.OS=="Windows"&&a.Browser=="Safari"||a.OS.indexOf("Mac")

>=0&&a.Browser=="IE";return !b};Silverlight.buildHTML=function(c,d){var a=[],e,i,g,f,h;if(Silverlight.ua.Browser=="Safari")

{a.push("<embed ");e="";i=" ";g='="';f='"';h=' type="application/x-silverlight"/>'+"<iframe

style='visibility:hidden;height:0;width:0'/>"}else{a.push('<object type="application/x-silverlight"');e=">";i=' <param

name="';g='" value="';f='" />';h="</object>"}a.push(' id="'+c.id+'" width="'+c.width+'" height="'+c.height+'" '+e);for(var b

in d)if(d[b])a.push(i+Silverlight.HtmlAttributeEncode(b)+g+Silverlight.HtmlAttributeEncode(d[b])+f);a.push(h);return a.join

("")};Silverlight.default_error_handler=function(e,b){var d,c=b.ErrorType;d=b.ErrorCode;var a=" Silverlight error message

";a+="ErrorCode: "+d+" ";a+="ErrorType: "+c+" ";a+="Message: "+b.ErrorMessage+" ";if(c=="ParserError")

{a+="XamlFile: "+b.xamlFile+" ";a+="Line: "+b.lineNumber+" ";a+="Position: "+b.charPosition+" "}else if

(c=="RuntimeError"){if(b.lineNumber!=0){a+="Line: "+b.lineNumber+" ";a+="Position: "+b.charPosition+" "}

a+="MethodName: "+b.methodName+" "}alert(a)};Silverlight.createObjectEx=function(b){var

a=b,c=Silverlight.createObject(a.source,a.parentElement,a.id,a.properties,a.events,a.initParams,a.context);if

(a.parentElement==null)return c};Silverlight.buildPromptHTML=function(i){var

a=null,f=Silverlight.fwlinkRoot,c=Silverlight.ua.OS,b="92822",d;if(i.inplaceInstallPrompt){var h;if(Silverlight.available)

{d="94376";h="94382"}else{d="92802";h="94381"}var g="93481",e="93483";if(c=="Windows"){b="92799";g="92803";e="92805"}else

if(c=="MacIntel"){b="92808";g="92804";e="92806"}else if(c=="MacPPC"){b="92807";g="92815";e="92816"}a='<table border="0"

cellpadding="0" cellspacing="0" width="205px"><tr><td><img title="Get Microsoft Silverlight"

οnclick="javascript:Silverlight.followFWLink({0});" style="border:0; cursor:pointer" src="{1}"/></td></tr><tr><td

style="background:#C7C7BD; text-align: center; color: black; font-family: Verdana; font-size: 9px; padding-bottom: 0.05cm;

;padding-top: 0.05cm" >By clicking <b>Get Microsoft Silverlight</b> you accept the <a title="Silverlight License Agreement"

href="{2}" target="_top" style="text-decoration: underline; color: #36A6C6"><b>Silverlight license

agreement</b></a>.</td></tr><tr><td style="border-left-style: solid; border-right-style: solid; border-width: 2px; border-

color:#c7c7bd; background: #817d77; color: #FFFFFF; text-align: center; font-family: Verdana; font-size: 9px">Silverlight

updates automatically, <a title="Silverlight Privacy Statement" href="{3}" target="_top" style="text-decoration: underline;

color: #36A6C6"><b>learn more</b></a>.</td></tr><tr><td><img src="{4}"/></td></tr></table>';a=a.replace

("{2}",f+g);a=a.replace("{3}",f+e);a=a.replace("{4}",f+h)}else{if(Silverlight.available)d="94377";else d="92801";if

(c=="Windows")b="92800";else if(c=="MacIntel")b="92812";else if(c=="MacPPC")b="92811";a='<div style="width: 205px; height:

67px; background-color: #FFFFFF"><img οnclick="javascript:Silverlight.followFWLink({0});" style="border:0; cursor:pointer"

src="{1}" alt="Get Microsoft Silverlight"/></div>'}a=a.replace("{0}",b);a=a.replace("{1}",f+d);return

a};Silverlight.__cleanup=function(){for(var a=Silverlight._silverlightCount-1;a>=0;a--){window["__slLoad"+a]=null;window

["__slError"+a]=null}if(window.removeEventListener)window.removeEventListener("unload",Silverlight.__cleanup,false);else

window.detachEvent("onunload",Silverlight.__cleanup)};Silverlight.followFWLink=function(a)

{top.location=Silverlight.fwlinkRoot+String(a)};Silverlight.HtmlAttributeEncode=function(c){var a,b="";if(c==null)return

null;for(var d=0;d<c.length;d++){a=c.charCodeAt(d);if(a>96&&a<123||a>64&&a<91||a>43&&a<58&&a!=47||a==95)

b=b+String.fromCharCode(a);else b=b+"&#"+a+";"}return b}

Test.html(HTML页面,也是Silverlight的最终展示页面)

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<head>

<title>Untitled Page</title>

</head>

<body>

createSilverlight();

</script>

</div>

</body>

</html>

Test.xaml(Silverlight程序主体)

<Canvas xmlns="http://schemas.microsoft.com/client/2007"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">

<Path.Data>

</Path.Data>

<Path.Fill>

</RadialGradientBrush>

</Path.Fill>

<Path.Triggers>

<PointAnimation Storyboard.TargetName="myEllipse"

Storyboard.TargetProperty="Center"

From="100,100"To="300,300"Duration="0:0:1.5"

RepeatBehavior="Forever"/>

<DoubleAnimation Storyboard.TargetName="myEllipse"

Storyboard.TargetProperty="RadiusX"

From="50"To="150"Duration="0:0:1.5"RepeatBehavior="Forever"/>

<DoubleAnimation Storyboard.TargetName="myEllipse"

Storyboard.TargetProperty="RadiusY"

From="50"To="150"Duration="0:0:1.5"RepeatBehavior="Forever"/>

</Storyboard>

</BeginStoryboard>

</EventTrigger>

</Path.Triggers>

</Path>

</Canvas>

Test.html.js(载入Silverlight对象)

functioncreateSilverlight()

{

Silverlight.createObjectEx({

source: 'Test.xaml',

parentElement: document.getElementById('SilverlightPlugInHost'),

id: 'SilverlightPlugIn',

properties: {

width: '500',

height: '500',

background:'#ffffffff',

isWindowless: 'false',

version: '1.0'

events: {

//onError: null,

//onLoad: Silverlight.createDelegate(scene, scene.handleLoad)

context: null

});

}

if(!window.Silverlight)

window.Silverlight ={};

Silverlight.createDelegate =function(instance, method) {

return function() {

return method.apply(instance, arguments);

}

Test.xaml.js(Silverlight事件驱动代码)

if(!window.Animation)

window.Animation ={};

Animation.Scene =function()

{

}

Animation.Scene.prototype =

{

handleLoad: function(control, userContext, rootElement)

{

this.control = control;

// Sample button event hookup: Find the button and then attach event handlers

this.button = rootElement.children.getItem(0);

this.button.addEventListener("MouseEnter", Sys.Silverlight.createDelegate(this, this.handleMouseEnter));

this.button.addEventListener("MouseLeftButtonDown", Sys.Silverlight.createDelegate(this, this.handleMouseDown));

this.button.addEventListener("MouseLeftButtonUp", Sys.Silverlight.createDelegate(this, this.handleMouseUp));

this.button.addEventListener("MouseLeave", Sys.Silverlight.createDelegate(this, this.handleMouseLeave));

// Sample event handlers

handleMouseEnter: function(sender, eventArgs)

{

// The following code shows how to find an element by name and call a method on it.

var mouseEnterAnimation = sender.findName("mouseEnter");

mouseEnterAnimation.begin();

handleMouseDown: function(sender, eventArgs)

{

var mouseDownAnimation = sender.findName("mouseDown");

mouseDownAnimation.begin();

handleMouseUp: function(sender, eventArgs)

{

var mouseUpAnimation = sender.findName("mouseUp");

mouseUpAnimation.begin();

// Put clicked logic here

alert("clicked");

handleMouseLeave: function(sender, eventArgs)

{

var mouseLeaveAnimation = sender.findName("mouseLeave");

mouseLeaveAnimation.begin();

}

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