技术资料 > .Net专区 > Asp.Net开发 : 用ASP.Net编写的查询域名的程序

用ASP.Net编写的查询域名的程序

March 25,2004

这段程序最早是bigengle兄弟贴在chinaasp上的，是个很不错的程序来讲解ASP.Net的高级应用。不过最大的缺点就是查询中国域名时不支持中文，所出来的信息中文不能显示，小弟我稍微改了一下，这个已经能够支持中文了。呵呵，关于这个例子，我在国外的站点上放了了一个大家可以看 
 
http://aspx1.brinkster.com/feidao/named.aspx 
 
这个主机是国外的，所以对中文支持不太好(原因我在《亲密接触ASP.net》中说得很清楚)，大家如果看不到中文，请用选择IE中的"编码"---"简体中文". 
 
下面是源程序。 
 
<% @ 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 += "rn"; 
Byte[] arrDomain = Encoding.ASCII.GetBytes(strDomain.ToCharArray()); 
try 
{ 
String str; 
Stream s = tcpc.GetStream(); 
s.Write(arrDomain, 0, strDomain.Length); 
 
StreamReader sr = new StreamReader(tcpc.GetStream(), Encoding.Default); 
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> 
<meta http-equiv="Content-Type" content="text/html; charset=gb2312"> 
<title></title> 
</head> 
<body> 
 
<form runat="server"> 
Domain name: WWW . <asp:TextBox id="txtDomain" value="" runat="server" /> 
<asp:Button id="btnQuery" OnClick="doQuery" text="Query!" runat="server" /> 
 <HR width="100%"> 
<asp:label id="txtResult" runat="server" /> 
</form> 
 
</body> 
</html>