 
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %> 
<!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>無標(biāo)題頁</title> 
</head> 
<body> 
<form id="form1" runat="server"> 
<div style="text-align: left"> 
<strong><span style="font-size: 14pt">歡迎光臨愛智旮旯的博客！</span><br /> 
</strong><span style="font-size: 10pt; color: #ff0000">注：每臺計算機(jī)只可以領(lǐng)取一個帳號<br /> 
</span> 
<asp:Button ID="getNamePass" runat="server" OnClick="getNamePass_Click" Text="領(lǐng)取帳號密碼" />&nbsp;<br /> 
<asp:Label ID="labName" runat="server"></asp:Label><br /> 
<asp:Label ID="labPass" runat="server"></asp:Label><br /> 
</div> 
</form> 
</body> 
</html> 

再來寫一個后臺代碼，備注已經(jīng)說的比較清楚，這里不多說了！

復(fù)制代碼代碼如下:

 
using System; 
using System.Data; 
using System.Configuration; 
using System.Collections; 
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.Text.RegularExpressions; 
using System.Diagnostics; 
public partial class _Default : System.Web.UI.Page 
{ 
protected void Page_Load(object sender, EventArgs e) 
{ 
labName.Text = labPass.Text = ""; 
} 
protected void getNamePass_Click(object sender, EventArgs e) 
{ 
//獲取客戶端的IP地址 
string IP = Request.UserHostAddress; 
//創(chuàng)建字符串變量 
string dirResults = ""; 
//創(chuàng)建ProcessStartInfo對象表示啟動進(jìn)程時使用的一組值 
ProcessStartInfo psi = new ProcessStartInfo(); 
//創(chuàng)建Process對象使您能夠啟動和停止本地系統(tǒng)進(jìn)程 
Process proc = new Process(); 
//設(shè)置要啟動的應(yīng)用程序或文檔 
psi.FileName = "nbtstat"; 
//設(shè)置不從Process.StandardInput流中讀取輸入 
psi.RedirectStandardInput = false; 
//設(shè)置要輸出寫入 Process.StandardOutput流 
psi.RedirectStandardOutput = true; 
//設(shè)置啟動的應(yīng)用程序中的一組命令參數(shù) 
psi.Arguments = "-A " + IP; 
//設(shè)置從可執(zhí)行文件創(chuàng)建進(jìn)程 
psi.UseShellExecute = false; 
//設(shè)置啟動進(jìn)程 
proc = Process.Start(psi); 
//獲取StandardOutput輸出流 
dirResults = proc.StandardOutput.ReadToEnd(); 
//設(shè)置Process 組件無限期地等待關(guān)聯(lián)進(jìn)程退出 
proc.WaitForExit(); 
//替換掉StandardOutput輸出流中的"/r,/n,/t" 
dirResults = dirResults.Replace("\r", "").Replace("\n", "").Replace("\t", ""); 
//設(shè)置正則表達(dá)式 
Regex reg = new Regex("MAC[ ]{0,}Address[ ]{0,}=[ ]{0,}(?<key>((.)*?))MAC", RegexOptions.IgnoreCase | RegexOptions.Compiled); 
//向獲取的StandardOutput輸出流添加"MAC"字符串 
dirResults = dirResults + "MAC"; 
//獲取Cookie 
HttpCookie oldCookie = Request.Cookies["netCard"]; 
//獲取正則表達(dá)式中的匹配項 
Match mc = reg.Match(dirResults); 
//獲取網(wǎng)卡號去除掉“-”符合 
string networkCard = mc.Groups["key"].Value.Replace("-", ""); 
//判斷Cookie是否為空 
if (oldCookie == null) 
{ 
//判斷是否符合正則表達(dá)式的要求 
if (mc.Success) 
{ 
//顯示帳號 
labName.Text = "您的帳號為：" + networkCard; 
//顯示密碼 
labPass.Text = "您的密碼為：1234"; 
//創(chuàng)建Cookie對象 
HttpCookie newCookie = new HttpCookie("netCard"); 
//設(shè)置Cookie的有效時間 
newCookie.Expires = DateTime.MaxValue; 
//添加Cookie中的值 
newCookie.Values.Add("numberCard", networkCard); 
//將Cookie添加到Cookie集合中 
Response.Cookies.Add(newCookie); 
} 
else 
{ 
RegisterStartupScript("", "<script>alert( '您沒有聯(lián)網(wǎng)！');</script>"); 
} 
} 
else 
{ 
//獲取Cookie中的網(wǎng)卡號 
string numberCard = oldCookie.Values["numberCard"]; 
//判斷Cookie中的網(wǎng)卡號是否和獲取到的網(wǎng)卡號一致 
if (numberCard.Trim() == networkCard.Trim()) 
{ 
RegisterStartupScript("", "<script>alert('很抱歉！您的計算機(jī)已領(lǐng)取過帳號。')</script>"); 
} 
else 
{ 
//判斷是否符合正則表達(dá)式的要求 
if (mc.Success) 
{ 
//顯示帳號 
labName.Text = "您的帳號為：" + networkCard; 
//顯示密碼 
labPass.Text = "您的密碼為：1234"; 
//修改Cookie中的值 
oldCookie.Values.Set("numberCard", networkCard); 
//將Cookie添加到Cookie集合中 
Response.Cookies.Add(oldCookie); 
} 
else 
{ 
RegisterStartupScript("", "<script>alert( '您沒有聯(lián)網(wǎng)！');</script>"); 
} 
} 
} 
} 
} 