Dns.Resolve(String) Método
Definición
Importante
Parte de la información hace referencia a la versión preliminar del producto, que puede haberse modificado sustancialmente antes de lanzar la versión definitiva. Microsoft no otorga ninguna garantía, explícita o implícita, con respecto a la información proporcionada aquí.
Precaución
Resolve is obsoleted for this type, please use GetHostEntry instead. https://go.microsoft.com/fwlink/?linkid=14202
Precaución
Resolve has been deprecated. Use GetHostEntry instead.
Precaución
Resolve is obsoleted for this type, please use GetHostEntry instead. http://go.microsoft.com/fwlink/?linkid=14202
Resuelve un nombre de host DNS o una dirección IP en una instancia de 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("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
Public Shared Function Resolve (hostName As String) As IPHostEntry
Parámetros
- hostName
- String
Nombre de host de estilo DNS o dirección IP.
Devoluciones
Instancia de IPHostEntry que contiene información de dirección del host especificado en hostName
.
- Atributos
Excepciones
hostName
es null
.
La longitud de hostName
es mayor que 255 caracteres.
Se detectó un error al resolver hostName
.
Ejemplos
En el ejemplo siguiente se usa el Resolve método para resolver una dirección IP en una IPHostEntry instancia de .
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
Comentarios
El Resolve método consulta un servidor DNS para la dirección IP asociada a un nombre de host o una dirección IP.
Cuando hostName
es un nombre de host de estilo DNS asociado a varias direcciones IP, solo se devuelve la primera dirección IP que se resuelve en ese nombre de host.
Si la Ipv6Element.Enabled propiedad se establece true
en , la Aliases propiedad de la IPHostEntry instancia devuelta no se rellena mediante este método y siempre estará vacía.
Nota
Este miembro emite información de seguimiento al habilitar el seguimiento de red en la aplicación. Para obtener más información, vea Seguimiento de red en .NET Framework.
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