Export (0) Print
Expand All

Dns::Resolve Method

Note: This API is now obsolete.

Resolves a DNS host name or IP address to an IPHostEntry instance.

Namespace:  System.Net
Assembly:  System (in System.dll)

[ObsoleteAttribute(L"Resolve is obsoleted for this type, please use GetHostEntry instead. http://go.microsoft.com/fwlink/?linkid=14202")]
public:
static IPHostEntry^ Resolve(
	String^ hostName
)

Parameters

hostName
Type: System::String

A DNS-style host name or IP address.

Return Value

Type: System.Net::IPHostEntry
An IPHostEntry instance that contains address information about the host specified in hostName.

ExceptionCondition
ArgumentNullException

hostName is nullptr.

ArgumentOutOfRangeException

The length of hostName is greater than 255 characters.

SocketException

An error is encountered when resolving hostName.

The Resolve method queries a DNS server for the IP address associated with a host name or IP address.

When hostName is a DNS-style host name associated with multiple IP addresses, only the first IP address that resolves to that host name is returned.

If the Ipv6Element::Enabled property is set to true, the Aliases property of the IPHostEntry instance returned is not populated by this method and will always be empty.

NoteNote

This member emits trace information when you enable network tracing in your application. For more information, see Network Tracing in the .NET Framework.

The following example uses the Resolve method to resolve an IP address to an IPHostEntry instance.

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 );
}

.NET Framework

Supported in: 1.1, 1.0
Obsolete (compiler warning) in 4.5
Obsolete (compiler warning) in 4.5.1
Obsolete (compiler warning) in 4.5.2
Obsolete (compiler warning) in 4
Obsolete (compiler warning) in 3.5
Obsolete (compiler warning) in 3.5 SP1
Obsolete (compiler warning) in 3.0
Obsolete (compiler warning) in 3.0 SP1
Obsolete (compiler warning) in 3.0 SP2
Obsolete (compiler warning) in 2.0
Obsolete (compiler warning) in 2.0 SP1
Obsolete (compiler warning) in 2.0 SP2

.NET Framework Client Profile

Obsolete (compiler warning) in 4
Obsolete (compiler warning) in 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Show:
© 2014 Microsoft