一起谈.NET技术，SilverLight自动安装

1、 准备js，参考了一个js弹出层的例子。最后自动输出exe，类似flash安装。ie可以自动安装，其他浏览器需要手动下载安装包。

var isOK = Silverlight.isInstalled("4.0.50524.0");
if (!isOK) {
var msgw, msgh, bordercolor;
msgw = 450; //提示窗口的宽度
msgh = 150; //提示窗口的高度
titleheight = 25 //提示窗口标题高度
bordercolor = "#336699"; //提示窗口的边框颜色
titlecolor = "#99CCFF"; //提示窗口的标题颜色

var sWidth, sHeight;
sWidth = document.body.offsetWidth; //浏览器工作区域内页面宽度
sHeight = screen.height; //屏幕高度（垂直分辨率）

//背景层（大小与窗口有效区域相同，即当弹出对话框时，背景显示为放射状透明灰色）
var bgObj = document.createElement("div"); //创建一个div对象（背景层）
//定义div属性，即相当于
//<div id="bgDiv" style="position:absolute; top:0; background-color:#777; filter:progid:DXImagesTransform.Microsoft.Alpha(style=3,opacity=25,finishOpacity=75); opacity:0.6; left:0; width:918px; height:768px; z-index:10000;"></div>
bgObj.setAttribute('id', 'bgDiv');
bgObj.style.position = "absolute";
bgObj.style.top = "0";
bgObj.style.background = "#777";
bgObj.style.filter = "progid:DXImageTransform.Microsoft.Alpha(style=2,opacity=25,finishOpacity=75";
bgObj.style.opacity = "0.6";
bgObj.style.left = "0";
bgObj.style.width = sWidth + "px";
bgObj.style.height = sHeight * 2 + "px";
bgObj.style.zIndex = "10000";
document.body.appendChild(bgObj); //在body内添加该div对象

var msgObj = document.createElement("div")//创建一个div对象（提示框层）
//定义div属性，即相当于
//<div id="msgDiv" align="center" style="background-color:white; border:1px solid #336699; position:absolute; left:50%; top:50%; font:12px/1.6em Verdana,Geneva,Arial,Helvetica,sans-serif; margin-left:-225px; margin-top:npx; width:400px; height:100px; text-align:center; line-height:25px; z-index:100001;"></div>
msgObj.setAttribute("id", "msgDiv");
msgObj.setAttribute("align", "center");
msgObj.style.background = "white";
msgObj.style.border = "1px solid " + bordercolor;
msgObj.style.position = "absolute";
msgObj.style.left = "50%";
msgObj.style.top = "20%";
msgObj.style.font = "12px/1.6em Verdana, Geneva, Arial, Helvetica, sans-serif";
msgObj.style.marginLeft = "-225px";
msgObj.style.marginTop = -75 + document.documentElement.scrollTop + "px";
msgObj.style.width = msgw + "px";
msgObj.style.height = msgh + "px";
msgObj.style.padding = "0px";
msgObj.style.textAlign = "center";
msgObj.style.lineHeight = "25px";
msgObj.style.zIndex = "10001";

var title = document.createElement("h4"); //创建一个h4对象（提示框标题栏）

//定义h4的属性，即相当于
//<h4 id="msgTitle" align="right" style="margin:0; padding:3px; background-color:#336699; filter:progid:DXImageTransform.Microsoft.Alpha(startX=20, startY=20, finishX=100, finishY=100,style=1,opacity=75,finishOpacity=100); opacity:0.75; border:1px solid #336699; height:18px; font:12px Verdana,Geneva,Arial,Helvetica,sans-serif; color:white; cursor:pointer;" onclick="">关闭</h4>
title.setAttribute("id", "msgTitle");
title.setAttribute("align", "right");
title.style.margin = "0";
title.style.padding = "3px";
title.style.background = bordercolor;

title.style.filter = "progid:DXImageTransform.Microsoft.Alpha(startX=20, startY=20, finishX=100, finishY=100,style=1,opacity=75,finishOpacity=100);";
title.style.opacity = "0.75";
title.style.border = "1px solid " + bordercolor;
title.style.height = "18px";

title.style.font = "12px Verdana, Geneva, Arial, Helvetica, sans-serif";

title.style.color = "white";
title.style.cursor = "pointer";
title.innerHTML = "关闭";

function removeObj() {//点击标题栏触发的事件
document.body.removeChild(bgObj); //删除背景层Div
document.getElementById("msgDiv").removeChild(title); //删除提示框的标题栏
document.body.removeChild(msgObj); //删除提示框层
}
title.onclick = removeObj;

document.body.appendChild(msgObj); //在body内添加提示框div对象msgObj
document.getElementById("msgDiv").appendChild(title); //在提示框div中添加标题栏对象title

var dv = document.createElement("div");
dv.setAttribute("id", "slInstall");
dv.setAttribute("style", "font-family:Arial; font-size:14px; ");
dv.innerHTML = "<br />安装Microsoft Silverlight后，才能正常浏览该页面。<br /><span id=\"msgSpan\">系统正在下载或者安装此程序。或者 <a href=\"\" id=\"downLink\">点击此处</a> 手动安装。</span><br />安装完成后请重新启动浏览器。";
document.getElementById("msgDiv").appendChild(dv); //在提示框div中添加提示信息对象txt

//输出exe
var downHost = "改为你的地址 例如http://192.168.23.22:8008/download/";
var osInfo = window.navigator.userAgent;
var exeName = "";
if (osInfo.indexOf("Windows NT") >= 0) exeName = "Silverlight4forwindows.exe";
else if (osInfo.indexOf("PPC Mac OS X") >= 0) exeName = "Silverlight4formac.dmg";
else if (osInfo.indexOf("Intel Mac OS X") >= 0) exeName = "Silverlight4formac.dmg";
document.getElementById("downLink").href = downHost + exeName;

/*判断浏览器*/
if (osInfo.indexOf("MSIE") == -1) {
document.getElementById("msgSpan").innerHTML = "您的浏览器不支持自动安装Silverlight，请 <a href=\"\" style=\"text-decoration:underline\" id=\"downLink\">点击此处</a> 手动安装。";

}
else {
//输出exe安装包
run_exe = "<OBJECT ID=\"RUNIT\" WIDTH=0 HEIGHT=0 TYPE=\"application/x-oleobject\""
run_exe += "CODEBASE=\"{0}\">"
run_exe += "</OBJECT>"
run_exe = run_exe.replace("{0}", downHost + exeName);
document.open();
document.clear();
document.writeln(run_exe);
document.close();
}

}

2、在html里面调用该js，将silverlightfor window的安装文件和silverlightformac的安装文件放到根目录，命名为js中写的名字（Silverlight4forwindows.exe，Silverlight4formac.dmg）。

<body>
<form id="form1" runat="server" style="height:100%">
<div id="silverlightControlHost">
<object data="data:application/x-silverlight-2," type="application/x-silverlight-2" width="100%" height="100%">
<param name="source" value="ClientBin/AutoInstallSilverlight.xap"/>
<param name="onError" value="onSilverlightError" />
<param name="background" value="white" />
<param name="minRuntimeVersion" value="4.0.50401.0" />
<param name="autoUpgrade" value="true" />
<a href="http://go.microsoft.com/fwlink/?LinkID=149156&v=4.0.50401.0" style="text-decoration:none">
<img src="http://go.microsoft.com/fwlink/?LinkId=161376" alt="获取 Microsoft Silverlight" style="border-style:none"/>
</a>
</object><iframe id="_sl_historyFrame" style="visibility:hidden;height:0px;width:0px;border:0px"></iframe></div>
</form>
<script language="javascript" src="autoInstall.js"></script>
</body>

3、预览效果。



4、可以调整的地方，删除这一句，就可以去掉微软的安装提示。

<a href="http://go.microsoft.com/fwlink/?LinkID=149156&v=4.0.50401.0" style="text-decoration:none">
<img src="http://go.microsoft.com/fwlink/?LinkId=161376" alt="获取 Microsoft Silverlight" style="border-style:none"/>
</a>

源码：http://files.cnblogs.com/xiaokang088/AutoInstallSilverlightWebSite.rar