asp+初体验---用c#写的asp+域名查询程序

本文链接：https://blog.youkuaiyun.com/jiantailiang2003/article/details/3336682

本文介绍使用 ASP+ 和 C# 开发的一个简单域名查询程序。该程序通过连接不同的 WHOIS 服务器来获取域名注册信息，支持多种顶级域名查询。

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<a href='http://www.biancheng88.cn/html/2008-11/asp-27054679.html'>asp+初体验---用c#写的asp+域名查询程序</a> 
 终于有时间可以学点新东西了，今天大略看了一下有关<a href="http://www.biancheng88.cn/html/special/2008-11/ASP/" title="asp" target=_blank>asp</a>+的资料，并且写了个域名查询的页面，感觉很不错，asp+比 
起asp来进步实在是太大了，尽管用asp+组件也能实现域名查询的功能，并且前几天我用vc写过这么个组件，但用<a href="http://www.biancheng88.cn/html/special/2008-11/ASP/" title="asp" target=_blank>asp</a>+简单 
方便多了。好了，废话少提，看源码吧。 
 
<% @Page Language="C#" %> 
<% @Assembly Name="System.Net" %> 
<% @Import Namespace="System.Net.Sockets" %> 
<% @Import Namespace="System.Text" %> 
<% @Import Namespace="System.IO" %> 
<% @Import Namespace="System.Collections" %> 
<script language="C#" runat="server"> 
void doQuery(Object sender, EventArgs e) 
{ 
String strDomain = txtDomain.Text; 
char[] chSplit = {'.'}; 
string[] arrDomain = strDomain.Split(chSplit); 
 
int nLength = arrDomain[1].Length ; 
Hashtable table = new Hashtable(); 
table.Add("de", "whois.denic.de"); 
table.Add("be", "whois.dns.be"); 
table.Add("gov", "whois.nic.gov"); 
table.Add("mil", "whois.nic.mil"); 
 
String strServer ; //define whois server 
//if the domainname's end is cn then the server is cnnic ,otherwise is networksolutions 
if (arrDomain[arrDomain.Length - 1] == "cn") 
 { 
 strServer = "159.226.6.139" ; 
 } 
else 
 { 
 strServer = "whois.networksolutions.com"; 
 } 
 
if (table.ContainsKey(arrDomain[1])) 
{ 
 strServer = table[arrDomain][1]].ToString(); 
} 
else if (nLength == 2) 
{ 
 // 2-letter TLD's always default to RIPE in Europe 
 strServer = "whois.ripe.net"; 
} 
 
String strResponse; 
bool bSuccess = DoWhoisLookup(strDomain, strServer, out strResponse); 
if (bSuccess) 
{ 
 txtResult.Text = strResponse; 
} 
else 
{ 
 txtResult.Text = "Lookup failed"; 
} 
} 
 
bool DoWhoisLookup(String strDomain, String strServer, out String strResponse) 
{ 
strResponse = "none"; 
bool bSuccess = false; 
 
TCPClient tcpc = new TCPClient(); 
if (0 == tcpc.Connect(strServer, 43)) 
{ 
 strDomain += "/r/n"; 
 Byte[] arrDomain = Encoding.ASCII.GetBytes(strDomain.ToCharArray()); 
 try 
 { 
 Stream s = tcpc.GetStream(); 
 s.Write(arrDomain, 0, strDomain.Length); 
 
 StreamReader sr = new StreamReader(tcpc.GetStream(), Encoding.ASCII); 
 StringBuilder strBuilder = new StringBuilder(); 
 while (-1 != sr.Peek()) 
 { 
 strBuilder.Append(sr.ReadLine()+" "); 
 } 
 tcpc.Close(); 
 
 bSuccess = true; 
 strResponse = strBuilder.ToString(); 
 } 
 catch(Exception e) 
 { 
 strResponse = e.ToString(); 
 } 
 
 return bSuccess; 
} 
else 
{ 
 strResponse = "Could not connect to Whois server"; 
 return false; 
} 
 
return false; 
} 
</script> 
<html> 
<head> 
<title></title> 
</head> 
<body> 
 
<form runat="server"> 
Domain name: WWW . 
  
 <HR width="100%"> 
 
</form> 
 
</body> 
</html>