一、其实asp.net里面有一个方法就是Page.Request.UserHostAddress，这个方法如果在局域网里还行，但是如果在广域网就不行，因为他获取的是公共的IP，那么如何获取呢？
曾经我在网上还看到一种获取MAC的方法，如下：
[DllImport("Iphlpapi.dll")] private static extern int SendARP(Int32 dest, Int32 host, ref Int64 mac, ref Int32 length); [DllImport("Ws2_32.dll")] private static extern Int32 inet_addr(string ip); public string GetMAC()
{
string mac_dest = ""; try
{
string userip = Request.UserHostAddress; Int32 ldest = inet_addr(userip); //目的地的ip Int32 lhost = inet_addr(""); //本地服务器的ip Int64 macinfo = new Int64(); Int32 len = 6; int res = SendARP(ldest, 0, ref macinfo, ref len); string mac_src = macinfo.ToString("X"); if (mac_src == "0") { //if (userip == "127.0.0.1") // userinfo.Text = "正在访问Localhost!"; //else // userinfo.Text = "欢迎来自IP为" + userip + "的朋友！"; return "";
} while (mac_src.Length < 12) { mac_src = mac_src.Insert(0, "0"); } for (int i = 0; i < 11; i++) { if (0 == (i % 2)) mac_dest = mac_dest.Insert(0, mac_src.Substring(i, 2)); } //userinfo.Text = "欢迎来自IP为" + userip + ",MAC地址为" + mac_dest + "的朋友！"; } catch (Exception err) { Response.Write(err.Message); } return mac_dest;
} public string GetOS() { HttpBrowserCapabilities info = Request.Browser; return info.Platform.ToString(); } public string GetIE() { HttpBrowserCapabilities info = Request.Browser; return info.Browser+" "+info .Version; }二、用ActionX控件获取
用控件是完全可以获取的，但是也有他的短处，就是如果客户段禁用了ActionX控件的运行，那就没希望了，这个问题我一直没解决，如果有人解决了，希望能告诉我，谢谢！
代码如下：
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="index.aspx.cs" Inherits="manager_Index" %><!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>title> <link href="css/SITE.CSS" type="text/css" rel="stylesheet" /> <SCRIPT language=javascript event="OnCompleted(hResult,pErrorObject, pAsyncContext)" for=foo> document.forms[0].txtMACAddr.value=unescape(MACAddr); document.forms[0].txtIPAddr.value=unescape(IPAddr); document.forms[0].txtDNSName.value=unescape(sDNSName); //document.formbar.submit(); </SCRIPT><SCRIPT language=javascript event=OnObjectReady(objObject,objAsyncContext) for=foo> if(objObject.IPEnabled != null && objObject.IPEnabled != "undefined" && objObject.IPEnabled == true) { if(objObject.MACAddress != null && objObject.MACAddress != "undefined") MACAddr = objObject.MACAddress; if(objObject.IPEnabled && objObject.IPAddress(0) != null && objObject.IPAddress(0) != "undefined") IPAddr = objObject.IPAddress(0); if(objObject.DNSHostName != null && objObject.DNSHostName != "undefined") sDNSName = objObject.DNSHostName; } </SCRIPT> </head><body style="text-align: center" onload="javascript:form1.TextBox1.focus();"> <OBJECT id=locator classid=CLSID:76A64158-CB41-11D1-8B02-00600806D9B6 height=1></OBJECT><OBJECT id=foo classid=CLSID:75718C9A-F029-11d1-A1AC-00C04FB6C223 height=1></OBJECT><SCRIPT language=javascript> var service = locator.ConnectServer(); var MACAddr ; var IPAddr ; var DomainAddr; var sDNSName; service.Security_.ImpersonationLevel=3; service.InstancesOfAsync(foo, 'Win32_NetworkAdapterConfiguration'); </SCRIPT> <form id="form1" runat="server"> <table border="0" cellpadding="0" cellspacing="0" style=" 600px; height: 363px;"> <tr> <td style=" 600px; height: 66px;"> </td> </tr> <tr> <td style=" 600px"> <img src="images/logo.jpg" /></td> </tr> <tr> <td style=" 600px; background-image: url(images/headerbg.gif); vertical-align: middle; height: 43px; background-color: #28629b;"> <table border="0" cellpadding="0" cellspacing="0" style=" 100%"> <tr> <td style="font-weight: bold; font-size: 15px; 112px; color: #000066; text-align: right;"> 用户名 <img src="images/login_user.gif" /></td> <td style=" 96px; text-align: center;"> <asp:TextBox ID="TextBox1" runat="server" CssClass="editbox3" Width="103px" onmouseover="this.focus()" onfocus="this.select()"></asp:TextBox></td> <td style="font-weight: bold; font-size: 15px; 92px; color: #333366; text-align: right;"> 密码 <img src="images/login_pass.gif" /></td> <td style=" 94px; text-align: center;"> <asp:TextBox ID="TextBox2" runat="server" CssClass="editbox3" Width="99px" onmouseover="this.focus()" onfocus="this.select()" TextMode="Password"></asp:TextBox></td> <td style=" 100px"> <asp:ImageButton ID="ImageButton1" runat="server" ImageUrl="~/images/login_btn.gif" OnClick="ImageButton1_Click" /></td> </tr> </table> </td> </tr> </table> <INPUT value="" name="txtMACAddr" style=" visibility:hidden"> <INPUT value="" name="txtIPAddr" style=" visibility:hidden"> <INPUT value="" name="txtDNSName" style=" visibility:hidden"> </form> </body></html>记住，一定要让浏览器可以运行ActionX控件。