anuj, I've attached a DNS class I wrote/use.� Let me know if you have any
questions.� Here's some code I've used to call it in the past:
private void Page_Load(object sender, System.EventArgs e)
��{
���IntPtr ppQueryResultsSet = IntPtr.Zero;
���try
���{
����UInt32 dns_status = 1;
����//IPAddress.Parse("199.45.32.43").Address
����DNS.IP4_ARRAY server = new NetTools.DNS.IP4_ARRAY();
����server.AddrArray = new UInt32[1];
����server.AddrCount = 1;
����server.AddrArray[0] = DNS.inet_addr("199.45.32.43");
//(UInt32)IPAddress.Parse("199.45.32.43").Address;
����Response.Write(server.AddrArray[0] + "<br>");
����//723529159
����//IntPtr serv = Marshal.AllocHGlobal(Marshal.SizeOf(server));
����//Marshal.StructureToPtr(server, serv, true);
�
����dns_status = DNS.DnsQuery(
�����"gewing.com",
�����DNS.DNS_TYPE_MX,
�����DNS.DNS_QUERY_BYPASS_CACHE,
�����null,
�����out ppQueryResultsSet,
�����(UInt32)0
�����);
����Response.Write(dns_status + "<br>");
����if (dns_status == 0)
����{
�����DNS.DNS_RECORD QueryResultsSet = (DNS.DNS_RECORD)Marshal.PtrToStructure(
������ppQueryResultsSet, typeof(DNS.DNS_RECORD));
�����while (!QueryResultsSet.Next.Equals(IntPtr.Zero))
�����{
������Response.Write (QueryResultsSet.Data.pNameHost + "<br>");
����
������QueryResultsSet = (DNS.DNS_RECORD)Marshal.PtrToStructure(
�������QueryResultsSet.Next, typeof(DNS.DNS_RECORD));
�����}
����}
����else
����{
�����Response.Write ("Error during query");
����}
���}
���catch(Exception exc)
���{
����Response.Write(exc.Message);
���}
���finally
���{
����DNS.DnsRecordListFree(ppQueryResultsSet, 1);�
���}
��}
Greg Ewing [MVP]
www.citidc.com
----------------------------------------
From: Anuj Kumar <[EMAIL PROTECTED]>
Sent: Tuesday, April 05, 2005 7:59 AM
To: [email protected]
Subject: [AspNetAnyQuestionIsOk] please help me.. DnsQuery()...?
Is there any Gentle man in this group who can help me for following problem,,,,,
I need to develop a utility which can check the status of DNS Server running on
a computer in our local network..
here this utility can be run from any computer in network.. and the mean of
status is whether the DNS Server is running or not... in case of The Primary
DNS Server is down we can use the Alternative DNS Server running on a different
machine...
Please help me.. i am waiting for ur reply....
bye & take care
...anuj
Yahoo! India Matrimony: Find your life partneronline.
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