Dns.EndResolve(IAsyncResult) Метод

Ссылка

Определение

Пространство имен:: System.Net

Сборка:: System.Net.NameResolution.dll

Сборка:: System.dll

Сборка:: netstandard.dll

Важно!

Некоторые сведения относятся к предварительной версии продукта, в которую до выпуска могут быть внесены существенные изменения. Майкрософт не предоставляет никаких гарантий, явных или подразумеваемых, относительно приведенных здесь сведений.

Внимание!

EndResolve is obsoleted for this type, please use EndGetHostEntry instead. https://go.microsoft.com/fwlink/?linkid=14202

Внимание!

EndResolve has been deprecated. Use EndGetHostEntry instead.

Внимание!

EndResolve is obsoleted for this type, please use EndGetHostEntry instead. http://go.microsoft.com/fwlink/?linkid=14202

Внимание!

Use EndGetHostEntry instead

Завершает асинхронный запрос сведений DNS.

public:
 static System::Net::IPHostEntry ^ EndResolve(IAsyncResult ^ asyncResult);

[System.Obsolete("EndResolve is obsoleted for this type, please use EndGetHostEntry instead. https://go.microsoft.com/fwlink/?linkid=14202")]
public static System.Net.IPHostEntry EndResolve (IAsyncResult asyncResult);

[System.Obsolete("EndResolve has been deprecated. Use EndGetHostEntry instead.")]
public static System.Net.IPHostEntry EndResolve (IAsyncResult asyncResult);

[System.Obsolete("EndResolve is obsoleted for this type, please use EndGetHostEntry instead. http://go.microsoft.com/fwlink/?linkid=14202")]
public static System.Net.IPHostEntry EndResolve (IAsyncResult asyncResult);

public static System.Net.IPHostEntry EndResolve (IAsyncResult asyncResult);

[System.Obsolete("Use EndGetHostEntry instead")]
public static System.Net.IPHostEntry EndResolve (IAsyncResult asyncResult);

[<System.Obsolete("EndResolve is obsoleted for this type, please use EndGetHostEntry instead. https://go.microsoft.com/fwlink/?linkid=14202")>]
static member EndResolve : IAsyncResult -> System.Net.IPHostEntry

[<System.Obsolete("EndResolve has been deprecated. Use EndGetHostEntry instead.")>]
static member EndResolve : IAsyncResult -> System.Net.IPHostEntry

[<System.Obsolete("EndResolve is obsoleted for this type, please use EndGetHostEntry instead. http://go.microsoft.com/fwlink/?linkid=14202")>]
static member EndResolve : IAsyncResult -> System.Net.IPHostEntry

static member EndResolve : IAsyncResult -> System.Net.IPHostEntry

[<System.Obsolete("Use EndGetHostEntry instead")>]
static member EndResolve : IAsyncResult -> System.Net.IPHostEntry

Public Shared Function EndResolve (asyncResult As IAsyncResult) As IPHostEntry

Параметры

asyncResult: IAsyncResult

Экземпляр IAsyncResult, возвращенный вызовом метода BeginResolve(String, AsyncCallback, Object).

Возвращаемое значение

IPHostEntry

Объект IPHostEntry, содержащий сведения DNS об узле.

Атрибуты: ObsoleteAttribute

Исключения

ArgumentNullException

asyncResult имеет значение null.

Примеры

В следующем примере завершается асинхронный запрос сведений о узле DNS.

public ref class DnsBeginGetHostByName
{
public:
   static System::Threading::ManualResetEvent^ allDone = nullptr;
   ref class RequestState
   {
   public:
      IPHostEntry^ host;
      RequestState()
      {
         host = nullptr;
      }
   };

   static void RespCallback( IAsyncResult^ ar )
   {
      try
      {
         // Convert the IAsyncResult* Object* to a RequestState Object*.
         RequestState^ tempRequestState = dynamic_cast<RequestState^>(ar->AsyncState);
         
         // End the asynchronous request.
         tempRequestState->host = Dns::EndResolve( ar );
         allDone->Set();
      }
      catch ( ArgumentNullException^ e ) 
      {
         Console::WriteLine( "ArgumentNullException caught!!!" );
         Console::WriteLine( "Source : {0}", e->Source );
         Console::WriteLine( "Message : {0}", e->Message );
      }
      catch ( Exception^ e ) 
      {
         Console::WriteLine( "Exception caught!!!" );
         Console::WriteLine( "Source : {0}", e->Source );
         Console::WriteLine( "Message : {0}", e->Message );
      }
   }
};

int main()
{
   DnsBeginGetHostByName::allDone = gcnew ManualResetEvent( false );
   
   // Create an instance of the RequestState class.
   DnsBeginGetHostByName::RequestState^ myRequestState =
      gcnew DnsBeginGetHostByName::RequestState;
   
   // Begin an asynchronous request for information like host name, IP addresses, or
   // aliases for specified the specified URI.
   IAsyncResult^ asyncResult = Dns::BeginResolve( "www.contoso.com",
      gcnew AsyncCallback( DnsBeginGetHostByName::RespCallback ), myRequestState );
   
   // Wait until asynchronous call completes.
   DnsBeginGetHostByName::allDone->WaitOne();
   Console::WriteLine( "Host name : {0}", myRequestState->host->HostName );
   Console::WriteLine( "\nIP address list : " );
   for ( int index = 0; index < myRequestState->host->AddressList->Length; index++ )
      Console::WriteLine( myRequestState->host->AddressList[ index ] );
   Console::WriteLine( "\nAliases : " );
   for ( int index = 0; index < myRequestState->host->Aliases->Length; index++ )
      Console::WriteLine( myRequestState->host->Aliases[ index ] );
}

class DnsBeginGetHostByName
{
   public static System.Threading.ManualResetEvent allDone = null;

   class RequestState
   {
      public IPHostEntry host;
      public RequestState()
      {
         host = null;
      }
   }

   public static void Main()
   {
     allDone = new ManualResetEvent(false);
     // Create an instance of the RequestState class.
     RequestState myRequestState = new RequestState();

     // Begin an asynchronous request for information like host name, IP addresses, or
     // aliases for specified the specified URI.
     IAsyncResult asyncResult = Dns.BeginResolve("www.contoso.com", new AsyncCallback(RespCallback), myRequestState );

     // Wait until asynchronous call completes.
     allDone.WaitOne();
     Console.WriteLine("Host name : " + myRequestState.host.HostName);
     Console.WriteLine("\nIP address list : ");
     for(int index=0; index < myRequestState.host.AddressList.Length; index++)
     {
       Console.WriteLine(myRequestState.host.AddressList[index]);
     }
     Console.WriteLine("\nAliases : ");
     for(int index=0; index < myRequestState.host.Aliases.Length; index++)
     {
       Console.WriteLine(myRequestState.host.Aliases[index]);
     }
   }

   private static void RespCallback(IAsyncResult ar)
   {
     try
     {
       // Convert the IAsyncResult object to a RequestState object.
       RequestState tempRequestState = (RequestState)ar.AsyncState;
       // End the asynchronous request.
       tempRequestState.host = Dns.EndResolve(ar);
       allDone.Set();
     }
       catch(ArgumentNullException e)
     {
       Console.WriteLine("ArgumentNullException caught!!!");
       Console.WriteLine("Source : " + e.Source);
       Console.WriteLine("Message : " + e.Message);
     }
     catch(Exception e)
     {
       Console.WriteLine("Exception caught!!!");
       Console.WriteLine("Source : " + e.Source);
       Console.WriteLine("Message : " + e.Message);
     }
   }
}

Class DnsBeginGetHostByName
    
    Class RequestState
        Public host As IPHostEntry
        
        Public Sub New()
            host = Nothing
        End Sub
    End Class
    
    
    Public Shared Sub Main()
     Try
        ' Create an instance of the RequestState class.
        Dim myRequestState As New RequestState()
        
        ' Begin an asynchronous request for information such as the host name, IP addresses, 
        ' or aliases for the specified URI.
        Dim asyncResult As IAsyncResult = CType(Dns.BeginResolve("www.contoso.com", AddressOf RespCallback, myRequestState),IAsyncResult)

        ' Wait until asynchronous call completes.
        While asyncResult.IsCompleted <> True
        End While
        
        Console.WriteLine(("Host name : " + myRequestState.host.HostName))
        Console.WriteLine(ControlChars.Cr + "IP address list : ")
        Dim index As Integer
        For index = 0 To myRequestState.host.AddressList.Length - 1
            Console.WriteLine(myRequestState.host.AddressList(index))
        Next index
        Console.WriteLine(ControlChars.Cr + "Aliases : ")

        For index = 0 To myRequestState.host.Aliases.Length - 1
            Console.WriteLine(myRequestState.host.Aliases(index))
        Next index
    catch e as Exception
            Console.WriteLine("Exception caught!!!")
            Console.WriteLine(("Source : " + e.Source))
            Console.WriteLine(("Message : " + e.Message))
    End Try
    End Sub
    
    
    Private Shared Sub RespCallback(ar As IAsyncResult)
        Try
            ' Convert the IAsyncResult object to a RequestState object.
            Dim tempRequestState As RequestState = CType(ar.AsyncState, RequestState)

            ' End the asynchronous request.
            tempRequestState.host = Dns.EndResolve(ar)
            Catch e As ArgumentNullException
            Console.WriteLine("ArgumentNullException caught!!!")
            Console.WriteLine(("Source : " + e.Source))
            Console.WriteLine(("Message : " + e.Message))
            Catch e As Exception
            Console.WriteLine("Exception caught!!!")
            Console.WriteLine(("Source : " + e.Source))
            Console.WriteLine(("Message : " + e.Message))
        End Try
    End Sub

Этот элемент выдает сведения трассировки при включении трассировки сети в приложении. Дополнительные сведения см. в разделе "Трассировка сети" в платформа .NET Framework.

Применяется к

См. также раздел

Общие сведения об асинхронном программировании

Dns.EndResolve(IAsyncResult) Метод

Определение

Параметры

Возвращаемое значение

Исключения

Примеры

Комментарии

Применяется к

См. также раздел

Дополнительные ресурсы