silverlight 用户浏览器未安装SL插件问题

1.在Silverlight启动页面

 <%@ Page Language="C#" AutoEventWireup="true" %>

 <!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">
 <head runat="server">
     <title>SilverlightApplication9</title>
     <style type="text/css">
         html, body {
             height: %;
             overflow: auto;
         }

         body {
             padding: ;
             margin: ;
         }

         #silverlightControlHost {
             height: %;
             text-align: center;
         }
     </style>
     <script type="text/javascript" src="SplashScreen.js"></script>
     <script type="text/javascript" src="Silverlight.js"></script>
     <script type="text/javascript">
         function onSilverlightError(sender, args) {
             var appSource = "";
             if (sender != null && sender != ) {
                 appSource = sender.getHost().Source;
             }

             var errorType = args.ErrorType;
             var iErrorCode = args.ErrorCode;

             if (errorType == "ImageError" || errorType == "MediaError") {
                 return;
             }

             var errMsg = "Silverlight 应用程序中未处理的错误 " + appSource + "\n";

             errMsg += "代码: " + iErrorCode + "    \n";
             errMsg += "类别: " + errorType + "       \n";
             errMsg += "消息: " + args.ErrorMessage + "     \n";

             if (errorType == "ParserError") {
                 errMsg += "文件: " + args.xamlFile + "     \n";
                 errMsg += "行: " + args.lineNumber + "     \n";
                 errMsg += "位置: " + args.charPosition + "     \n";
             }
             else if (errorType == "RuntimeError") {
                 if (args.lineNumber != ) {
                     errMsg += "行: " + args.lineNumber + "     \n";
                     errMsg += "位置: " + args.charPosition + "     \n";
                 }
                 errMsg += "方法名称: " + args.methodName + "     \n";
             }

             throw new Error(errMsg);
         }
     </script>
 </head>
 <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/SilverlightApplication9.xap" />
                 <param name="onError" value="onSilverlightError" />
                 <param name="initParams" value="<%= String.Format("{}={},{}={}","ClientIP", Request.UserHostAddress,"ClientName",Request.UserHostName) %>" />
                 <param name="background" value="white" />
                 <param name="minRuntimeVersion" value="5.0.61118.0" />
                 <param name="autoUpgrade" value="true" />
                 <a href="/DownloadSilverlight.aspx" style="text-decoration: none">
                 <img src="/Img/SLMedallion_CHS.png" 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>
 </body>
 </html>

2.在Silverlight.web服务端添加要显示的图片及路径、silverlight插件的两个版本（32位、64位）

3.在silverlight.web服务端添加DownloadSilverlight.aspx项

 using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Web;
 using System.Web.UI;
 using System.Web.UI.WebControls;

 namespace SilverlightApplication9.Web
 {
     public partial class DownloadSilverlight : System.Web.UI.Page
     {
         protected void Page_Load(object sender, EventArgs e)
         {
             //string info = "客户端IP：" + Page.Request.UserHostAddress;
             //info += "<br/>用户信息：" + Page.User;
             //info += "<br/>服务器电脑名称：" + Page.Server.MachineName;
             //info += "<br/>当前用户电脑名称：" + System.Net.Dns.GetHostName();
             //info += "<br/>当前电脑名：" + System.Environment.MachineName;
             //info += "<br/>当前电脑所属网域：" + System.Environment.UserDomainName;
             //info += "<br/>当前电脑用户：" + System.Environment.UserName;
             //info += "<hr/>";
             //info += "<br/>浏览器类型：" + Request.Browser.Browser;
             //info += "<br/>浏览器标识：" + Request.Browser.Id;
             //info += "<br/>浏览器版本号：" + Request.Browser.Version;
             //info += "<br/>浏览器是不是测试版本：" + Request.Browser.Beta;
             ////info += "<br/>浏览器的分辨率(像素)：" + Request["width"].ToString() + "*" + Request["height"].ToString();//1280/1024
             //info += "<hr/>";
             //info += "<br/>客户端的操作系统：" + Request.Browser.Platform;
             //info += "<br/>是不是win16系统：" + Request.Browser.Win16;
             //info += "<br/>是不是win32系统：" + Request.Browser.Win32;
             //Response.Write(info);

             //int loop1, loop2;
             //NameValueCollection coll;

             //// Load ServerVariable collection into NameValueCollection object.
             //coll = Request.ServerVariables;
             //// Get names of all keys into a string array.
             //String[] arr1 = coll.AllKeys;
             //for (loop1 = 0; loop1 < arr1.Length; loop1++)
             //{
             //    Response.Write("Key: " + arr1[loop1] + "<br>");
             //    String[] arr2 = coll.GetValues(arr1[loop1]);
             //    for (loop2 = 0; loop2 < arr2.Length; loop2++)
             //    {
             //        Response.Write("Value " + loop2 + ": " + Server.HtmlEncode(arr2[loop2]) + "<br>");
             //    }
             //}
             //Response.End();
             if (Request.ServerVariables["HTTP_USER_AGENT"].ToString().Contains("WOW64"))
             {
                 Response.Redirect("/Silverlight/Silverlight_x64.exe");
             }
             else
             {
                 Response.Redirect("/Silverlight/Silverlight.exe");
             }
         }
     }
 }