How to "ping" a domain name?

In Code i want to validate a domain name.

For example : " Doma开发者_开发技巧inName.com".

How can i do that in C#.

I worked on MSDN Solution. (Second Solution).

But "PingCompletedCallback" is not getting executed.

Thanx

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There's a class for that;

MSDN Article on System.Net.NetworkInformation.Ping

GeekPedia article on asynchronous ping

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Using the System.Net.NetworkInformation.Ping class,

using System.Net.NetworkInformation;

Ping sender = new Ping();
PingReply reply = sender.Send ("www.example.com");

if (reply.Status == IPStatus.Success)
{
  Console.WriteLine("Ping successful.");
}

It's untested, but that's the general idea.

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I don't think pinging a domain name will tell you anything relevant in a reliable way.

• A domain name can be registered but not connected to a server. Ping requests will fail even though the domain is registered.

• A server can be fully operational but be configured not to respond to ping requests. Ping requests will fail even if the domain is registered and running on a server.

What do you want to do - find out whether a domain is registered, whether it's a valid domain name, or whether it's a working website / mail server ...?

For the first two, I would recommend using a whois service. See for example these C# related questions:

• How to get whois information of a domain name in my program?

• Parse whois answer

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You could use the Ping class - here's all the info you need on MSDN