/// <summary>
/// Query all the whois server specifying list of whois servers and the top level domain asynchronously
/// </summary>
/// <returns>IAsyncResult object that represents the result of the GlobalQueryAsync operation.</returns>
/// <example>
/// <code lang="CS">
/// WhoIs whoIs = new WhoIs();
///
/// Server server1 = new Server();
/// server1.Host = "whois.networksolutions.com";
/// server1.Port = 43;
/// server1.Domain = ".com";
/// server1.NoMatch = "no match";
/// servers.Add(server1);
///
/// Server server2 = new Server();
/// server2.Host = "whois.nic.co.uk";
/// server2.Port = 43;
/// server2.Domain = ".co.uk";
/// server2.NoMatch = "no match";
/// servers.Add(server2);
///
/// IAsyncResult state = whoIs.GlobalQueryAsync(servers,"activeup",new AsyncCallback(MyCallbackGlobalWhoIs));
///
/// public static void MyCallbackGlobalWhoIs(IAsyncResult state)
/// {
/// try
/// {
/// ResultQueryCollection results = whoIs.GlobalQueryAsyncResult(state);
///
/// foreach(ResultQuery result in results)
/// {
/// Console.WriteLine(result.Result);
/// Console.WriteLine(result.ServerUsed.Host);
/// if (result.Error != null)
/// Console.WriteLine(result.Error.ToString());
/// Console.WriteLine("press enter to continue...");
/// Console.ReadLine();
/// }
/// }
///
/// catch(Exception ex)
/// {
/// Console.WriteLine("An unhandled exception was thrown : " + ex.Message);
/// }
/// </code>
/// <code lang="VB" title="VB.NET">
/// Dim whoIs As WhoIs = New WhoIs()
///
/// Dim servers As ServerCollection = New ServerCollection()
///
/// Dim server1 As Server = New Server()
/// server1.Host = "whois.networksolutions.com"
/// server1.Port = 43
/// server1.Domain = ".com"
/// server1.NoMatch = "no match"
/// servers.Add(server1)
///
/// Dim server2 As Server = New Server()
/// server2.Host = "whois.nic.co.uk"
/// server2.Port = 43
/// server2.Domain = ".co.uk"
/// server2.NoMatch = "no match"
/// servers.Add(server2)
///
/// Dim state As IAsyncResult = whoIs.GlobalQueryAsync(servers, "activeup", New AsyncCallback(AddressOf MyCallbackGlobalWhoIs))
///
/// Public Sub MyCallbackGlobalWhoIs(ByVal state As IAsyncResult)
///
/// Try
///
/// Dim results As ResultQueryCollection = whoIs.GlobalQueryAsyncResult(state)
///
/// Dim result As ResultQuery
/// For Each result In results
/// Console.WriteLine(result.Result)
/// Console.WriteLine(result.ServerUsed.Host)
/// If (Not (result.Error Is Nothing)) Then
/// Console.WriteLine(result.Error.ToString())
/// End If
/// Console.WriteLine("press enter to continue...")
/// Console.ReadLine()
/// Next result
///
/// Catch ex As Exception
/// Console.WriteLine("An unhandled exception was thrown : " + ex.Message)
///
/// End Try
///
/// End Sub
/// </code>
/// </example>
/// <param name="servers">Whois servers list.</param>
/// <param name="domainToQuery">Top level domain to query.</param>
/// <param name="callBack">Call back function.</param>
public IAsyncResult GlobalQueryAsync(ServerCollection servers, string domainToQuery, AsyncCallback callBack)
{
_globalQueryDelegate = new GlobalQueryDelegate(_GlobalQuery);
return _globalQueryDelegate.BeginInvoke(servers,domainToQuery,callBack,null);
}
/// <summary>
/// Query all the whois servers specifying the top level domain asynchronously.
/// </summary>
/// <returns>IAsyncResult object that represents the result of the GlobalQueryAsync operation.</returns>
/// <example>
/// <code lang="CS">
/// WhoIs whoIs = new WhoIs();
///
/// IAsyncResult state = whoIs.GlobalQueryAsync("activeup",new AsyncCallback(MyCallbackGlobalWhoIs));
///
/// public static void MyCallbackGlobalWhoIs(IAsyncResult state)
/// {
/// try
/// {
/// ResultQueryCollection results = whoIs.GlobalQueryAsyncResult(state);
///
/// foreach(ResultQuery result in results)
/// {
/// Console.WriteLine(result.Result);
/// Console.WriteLine(result.ServerUsed.Host);
/// if (result.Error != null)
/// Console.WriteLine(result.Error.ToString());
/// Console.WriteLine("press enter to continue...");
/// Console.ReadLine();
/// }
/// }
///
/// catch(Exception ex)
/// {
/// Console.WriteLine("An unhandled exception was thrown : " + ex.Message);
/// }
/// </code>
/// <code lang="VB" title="VB.NET">
/// Dim whoIs As WhoIs = New WhoIs()
///
/// Dim state As IAsyncResult = whoIs.GlobalQueryAsync("activeup", New AsyncCallback(AddressOf MyCallbackGlobalWhoIs))
///
/// Public Sub MyCallbackGlobalWhoIs(ByVal state As IAsyncResult)
///
/// Try
///
/// Dim results As ResultQueryCollection = whoIs.GlobalQueryAsyncResult(state)
///
/// Dim result As ResultQuery
/// For Each result In results
/// Console.WriteLine(result.Result)
/// Console.WriteLine(result.ServerUsed.Host)
/// If (Not (result.Error Is Nothing)) Then
/// Console.WriteLine(result.Error.ToString())
/// End If
/// Console.WriteLine("press enter to continue...")
/// Console.ReadLine()
/// Next result
///
/// Catch ex As Exception
/// Console.WriteLine("An unhandled exception was thrown : " + ex.Message)
///
/// End Try
///
/// End Sub
/// </code>
/// </example>
/// <param name="domainToQuery">Top level domain to query.</param>
/// <param name="callBack">Call back function.</param>
public IAsyncResult GlobalQueryAsync(string domainToQuery, AsyncCallback callBack)
{
_globalQueryDelegate = new GlobalQueryDelegate(_GlobalQuery);
return _globalQueryDelegate.BeginInvoke(null,domainToQuery,callBack,null);
}