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Dns.GetHostByName(String) Method

Definition

Namespace:
System.Net
Assemblies:
netstandard.dll, System.Net.NameResolution.dll
Assembly:
System.Net.NameResolution.dll
Assembly:
System.dll
Assembly:
netstandard.dll
Source:
Dns.cs
Source:
Dns.cs
Source:
Dns.cs
Source:
Dns.cs

Caution

GetHostByName has been deprecated. Use GetHostEntry instead.

Caution

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

Caution

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

Gets the DNS information for the specified DNS host name.

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

Parameters

hostName
String

The DNS name of the host.

Returns

IPHostEntry

An IPHostEntry object that contains host information for the address specified in hostName.

Attributes
ObsoleteAttribute

Exceptions

ArgumentNullException

hostName is null.

ArgumentOutOfRangeException

The length of hostName is greater than 255 characters.

SocketException

An error is encountered when resolving hostName.

Remarks

The GetHostByName method queries the Internet DNS server for host information. If you pass an empty string as the host name, this method retrieves the standard host name for the local computer.

For asynchronous access to DNS information, use the BeginGetHostByName and EndGetHostByName methods.

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.

Note

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

Applies to