实例：用ASP.Net编写的查询域名的程序

2022-07-15 80酷酷网 80kuku.com

　　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 += "\r\n";
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>