How To Access to client information

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Collections;
using System.Collections.Generic;

public partial class _Default : System.Web.UI.Page 
{
    protected void Page_Load(object sender, EventArgs e)
    {
        ///<summary>
        ///在asp.net中获得客户端的一些信息
        ///base on:http://www.cnblogs.com/anjou/archive/2008/08/04/1259843.html (大豆男生)
        ///</summary>

        Dictionary<string,string> clientInfos = new Dictionary<string,string>();
        //ArrayList clientInfos = new ArrayList();
        try
        {
              string ip = Request.UserHostAddress;
              string userAgent = Request.UserAgent == null ? "no" : Request.UserAgent;
              if(Request.ServerVariables["HTTP_UA_CPU"] == null){
                clientInfos.Add("CPU 类型","未知");
              }else{
                clientInfos.Add("CPU 类型",Request.ServerVariables["HTTP_UA_CPU"]);
              }
              clientInfos.Add("操作系统",this.GetOSNameByUserAgent(userAgent));
              clientInfos.Add("IP地址",ip);
              //利用CLR获取对方浏览器版本
              if(Request.Browser.ClrVersion == null)
                    clientInfos.Add(".net clr version","not support");
              else
                    clientInfos.Add(".net clr vsrsion",Request.Browser.ClrVersion.ToString());
              clientInfos.Add("Browser",Request.Browser.Browser+Request.Browser.Version);
              
              //是否支持Activex、Cookies以及使用的语言
              clientInfos.Add("support Activex",Request.Browser.ActiveXControls ? "support":"not support");
              clientInfos.Add("support cookies",Request.Browser.Cookies ? "支持" : "不支持");
              clientInfos.Add("lang",Request.UserLanguages[0]);

              //使用的登录设备
              string httpAccept = Request.ServerVariables["HTTP_ACCEPT"];
              if(httpAccept == null)
                    clientInfos.Add("computer/mobilephone","unknown");
              else if(httpAccept.IndexOf("wap") > -1)
                    clientInfos.Add("computer/mobilephone","mobilephone");
              else 
                    clientInfos.Add("computer/mobilephone","computer");

              clientInfos.Add("platform",Request.Browser.Platform);
              clientInfos.Add("win16",Request.Browser.Win16 ? "yes" : "no");
              clientInfos.Add("win32",Request.Browser.Win32 ? "yes" : "no");

              //编码方式
              if(Request.ServerVariables["HTTP_ACCEPT_ENCODING"] == null)
                    clientInfos.Add("Http Accept Encoding","nothing");
              else
                    clientInfos.Add("Http Accept Encoding",Request.ServerVariables["HTTP_ACCEPT_ENCODING"]);
              clientInfos.Add("User Agent",userAgent);
        }
        catch(Exception ex)
        {
                Response.Write(ex);
        }

        //显示所获得的信息
        this.Response.Write("<table cellpadding=0 cellspacing=0>");
        this.Response.Write("<tr>");
        this.Response.Write("<td width=145px>item</td>");
        this.Response.Write("<td>value</td>");
        this.Response.Write("</tr>");
        foreach(string key in clientInfos.Keys){
              this.Response.Write("<tr>");
              this.Response.Write("<td>" +  key + "</td>");
              this.Response.Write("<td>" + clientInfos[key].ToString() + "</td>");
              this.Response.Write("</tr>");
        }
        this.Response.Write("</table>");
    }

    /// <summary>
    /// 根据 User Agent 获取操作系统名称
    /// </summary>
    private string GetOSNameByUserAgent(string userAgent)
    {
        string osVersion = "未知";

        if (userAgent.Contains("NT 6.0"))
        {
            osVersion = "Windows Vista/Server 2008";
        }
        else if (userAgent.Contains("NT 5.2"))
        {
            osVersion = "Windows Server 2003";
        }
        else if (userAgent.Contains("NT 5.1"))
        {
            osVersion = "Windows XP";
        }
        else if (userAgent.Contains("NT 5"))
        {
            osVersion = "Windows 2000";
        }
        else if (userAgent.Contains("NT 4"))
        {
            osVersion = "Windows NT4";
        }
        else if (userAgent.Contains("Me"))
        {
            osVersion = "Windows Me";
        }
        else if (userAgent.Contains("98"))
        {
            osVersion = "Windows 98";
        }
        else if (userAgent.Contains("95"))
        {
            osVersion = "Windows 95";
        }
        else if (userAgent.Contains("Mac"))
        {
            osVersion = "Mac";
        }
        else if (userAgent.Contains("Unix"))
        {
            osVersion = "UNIX";
        }
        else if (userAgent.Contains("Linux"))
        {
            osVersion = "Linux";
        }
        else if (userAgent.Contains("SunOS"))
        {
            osVersion = "SunOS";
        }
        return osVersion;
    }
    /// <summary>
    /// “上传”文件按钮单击事件
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void Button1_ServerClick(object sender, EventArgs e)
    {
        //获取文件名
        ArrayList arrFileName = new ArrayList();
        Page.Response.Write("<b>" + arrFileName.Count + "</b>");
        Page.Response.Write("<b>" + File1.Value + "</b>");
        arrFileName.AddRange(File1.Value.Split('\\'));
        Page.Response.Write("<i>" + arrFileName.Count + "</i>");
        string fileName = arrFileName[arrFileName.Count - 1].ToString();

        //查看arrFileName数组的内容
    
        for (int i = 0; i < arrFileName.Count; i++) {
            Page.Response.Write("<hr />");
            Page.Response.Write(arrFileName[i].ToString());
            
        }

        //获取文件所要保存的路径
        String savePath = "E:\\uploads\\";
        

        //上传文件
        File1.PostedFile.SaveAs(savePath + fileName);
        Page.Response.Write("文件上传成功！");
    }
}

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