Dns.Resolve(String) Metoda

Definicja

Przestroga

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

Przestroga

Resolve has been deprecated. Use GetHostEntry instead.

Przestroga

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

Przestroga

Use GetHostEntry instead

Rozpoznaje nazwę hosta DNS lub adres IP wystąpienia IPHostEntry .

public:
 static System::Net::IPHostEntry ^ Resolve(System::String ^ hostName);
[System.Obsolete("Resolve is obsoleted for this type, please use GetHostEntry instead. https://go.microsoft.com/fwlink/?linkid=14202")]
public static System.Net.IPHostEntry Resolve (string hostName);
[System.Obsolete("Resolve has been deprecated. Use GetHostEntry instead.")]
public static System.Net.IPHostEntry Resolve (string hostName);
[System.Obsolete("Resolve is obsoleted for this type, please use GetHostEntry instead. http://go.microsoft.com/fwlink/?linkid=14202")]
public static System.Net.IPHostEntry Resolve (string hostName);
public static System.Net.IPHostEntry Resolve (string hostName);
[System.Obsolete("Use GetHostEntry instead")]
public static System.Net.IPHostEntry Resolve (string hostName);
[<System.Obsolete("Resolve is obsoleted for this type, please use GetHostEntry instead. https://go.microsoft.com/fwlink/?linkid=14202")>]
static member Resolve : string -> System.Net.IPHostEntry
[<System.Obsolete("Resolve has been deprecated. Use GetHostEntry instead.")>]
static member Resolve : string -> System.Net.IPHostEntry
[<System.Obsolete("Resolve is obsoleted for this type, please use GetHostEntry instead. http://go.microsoft.com/fwlink/?linkid=14202")>]
static member Resolve : string -> System.Net.IPHostEntry
static member Resolve : string -> System.Net.IPHostEntry
[<System.Obsolete("Use GetHostEntry instead")>]
static member Resolve : string -> System.Net.IPHostEntry
Public Shared Function Resolve (hostName As String) As IPHostEntry

Parametry

hostName
String

Nazwa hosta lub adres IP w stylu DNS.

Zwraca

IPHostEntry

Wystąpienie zawierające informacje o adresie hosta określonego w elemIPHostEntry.hostName

Atrybuty

Wyjątki

hostName to null.

Długość hostName jest większa niż 255 znaków.

Napotkano błąd podczas rozwiązywania problemu hostName.

Przykłady

W poniższym przykładzie użyto Resolve metody , aby rozpoznać adres IP wystąpienia IPHostEntry .

try
{
   IPHostEntry^ hostInfo = Dns::Resolve( hostString );
   
   // Get the IP address list that resolves to the host names contained in the
   // Alias property.
   array<IPAddress^>^address = hostInfo->AddressList;
   
   // Get the alias names of the addresses in the IP address list.
   array<String^>^alias = hostInfo->Aliases;
   Console::WriteLine( "Host name : {0}", hostInfo->HostName );
   Console::WriteLine( "\nAliases : " );
   for ( int index = 0; index < alias->Length; index++ )
   {
      Console::WriteLine( alias[ index ] );

   }
   Console::WriteLine( "\nIP Address list :" );
   for ( int index = 0; index < address->Length; index++ )
   {
      Console::WriteLine( address[ index ] );

   }
}
catch ( SocketException^ e ) 
{
   Console::WriteLine( "SocketException caught!!!" );
   Console::WriteLine( "Source : {0}", e->Source );
   Console::WriteLine( "Message : {0}", e->Message );
}
catch ( ArgumentNullException^ e ) 
{
   Console::WriteLine( "ArgumentNullException caught!!!" );
   Console::WriteLine( "Source : {0}", e->Source );
   Console::WriteLine( "Message : {0}", e->Message );
}
catch ( NullReferenceException^ e ) 
{
   Console::WriteLine( "NullReferenceException 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 );
}
try {
    IPHostEntry hostInfo = Dns.Resolve(hostString);
    // Get the IP address list that resolves to the host names contained in the
    // Alias property.
    IPAddress[] address = hostInfo.AddressList;
    // Get the alias names of the addresses in the IP address list.
    String[] alias = hostInfo.Aliases;

    Console.WriteLine("Host name : " + hostInfo.HostName);
    Console.WriteLine("\nAliases : ");
    for(int index=0; index < alias.Length; index++) {
      Console.WriteLine(alias[index]);
    }
    Console.WriteLine("\nIP Address list :");
    for(int index=0; index < address.Length; index++) {
       Console.WriteLine(address[index]);
    }
 }
 catch(SocketException e)
 {
    Console.WriteLine("SocketException caught!!!");
    Console.WriteLine("Source : " + e.Source);
    Console.WriteLine("Message : " + e.Message);
 }
 catch(ArgumentNullException e)
 {
Console.WriteLine("ArgumentNullException caught!!!");
    Console.WriteLine("Source : " + e.Source);
    Console.WriteLine("Message : " + e.Message);
 }
 catch(NullReferenceException e)
 {
     Console.WriteLine("NullReferenceException 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);
 }
Try
    ' Call the Resolve method passing a DNS style host name or an IP address in 
    ' dotted-quad notation (for example, "www.contoso.com" or "207.46.131.199") to 
    ' obtain an IPHostEntry instance that contains address information for the 
    ' specified host.
    Dim hostInfo As IPHostEntry = Dns.Resolve(hostString)
    ' Get the IP address list that resolves to the host names contained in the Alias 
    ' property.
    Dim address As IPAddress() = hostInfo.AddressList
    ' Get the alias names of the addresses in the IP address list.
    Dim [alias] As [String]() = hostInfo.Aliases

    Console.WriteLine(("Host name : " + hostInfo.HostName))
    Console.WriteLine(ControlChars.Cr + "Aliases : ")
    Dim index As Integer
    For index = 0 To [alias].Length - 1
        Console.WriteLine([alias](index))
    Next index
    Console.WriteLine(ControlChars.Cr + "IP Address list :")

    For index = 0 To address.Length - 1
        Console.WriteLine(address(index))
    Next index
Catch e As SocketException
    Console.WriteLine("SocketException caught!!!")
    Console.WriteLine(("Source : " + e.Source))
    Console.WriteLine(("Message : " + e.Message))
Catch e As ArgumentNullException
    Console.WriteLine("ArgumentNullException caught!!!")
    Console.WriteLine(("Source : " + e.Source))
    Console.WriteLine(("Message : " + e.Message))
Catch e As NullReferenceException
    Console.WriteLine("NullReferenceException 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

Uwagi

Metoda Resolve wysyła zapytanie do serwera DNS dla adresu IP skojarzonego z nazwą hosta lub adresem IP.

Jeśli hostName jest nazwą hosta w stylu DNS skojarzona z wieloma adresami IP, zwracany jest tylko pierwszy adres IP rozpoznawany jako nazwa hosta.

Ipv6Element.Enabled Jeśli właściwość jest ustawiona na truewartość , Aliases właściwość zwróconego IPHostEntry wystąpienia nie jest wypełniana przez tę metodę i zawsze będzie pusta.

Uwaga

Ten element członkowski emituje informacje śledzenia po włączeniu śledzenia sieci w aplikacji. Aby uzyskać więcej informacji, zobacz Śledzenie sieci w .NET Framework.

Dotyczy