【图】用c#写的asp+域名查询程序

终于有时间可以学点新东西了，今天大略看了一下有关asp+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asp+简单方
便多了。好了，废话少提，看源码吧。

（本文来源于图老师网站，更多请访问http://m.tulaoshi.com）

<% @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.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))
{
strServer = table[arrDomain]].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
{
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()+"<br");
}
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 . <asp:TextBox id="txtDomain" value="" runat="server" /
<asp:Button id="btnQuery" OnClick="doQuery" text="Query!" runat="server" /
<BR<HR width="100%"<BR
<asp:label id="txtResult" runat="server" /
</form

（本文来源于图老师网站，更多请访问http://m.tulaoshi.com）

</body
</html

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