Dns.BeginGetHostByName(String, AsyncCallback, Object) Dns.BeginGetHostByName(String, AsyncCallback, Object) Dns.BeginGetHostByName(String, AsyncCallback, Object) Dns.BeginGetHostByName(String, AsyncCallback, Object) Method

Definition

Warning

This API is now obsolete.

Begins an asynchronous request for IPHostEntry information about the specified DNS host name.

public:
 static IAsyncResult ^ BeginGetHostByName(System::String ^ hostName, AsyncCallback ^ requestCallback, System::Object ^ stateObject);
[System.Obsolete("Use BeginGetHostEntry instead")]
[System.Obsolete("BeginGetHostByName is obsoleted for this type, please use BeginGetHostEntry instead. http://go.microsoft.com/fwlink/?linkid=14202")]
[System.Obsolete("BeginGetHostByName is obsoleted for this type, please use BeginGetHostEntry instead. https://go.microsoft.com/fwlink/?linkid=14202")]
public static IAsyncResult BeginGetHostByName (string hostName, AsyncCallback requestCallback, object stateObject);
static member BeginGetHostByName : string * AsyncCallback * obj -> IAsyncResult
Public Shared Function BeginGetHostByName (hostName As String, requestCallback As AsyncCallback, stateObject As Object) As IAsyncResult

Parameters

hostName
String String String String

The DNS name of the host.

requestCallback
AsyncCallback AsyncCallback AsyncCallback AsyncCallback

An AsyncCallback delegate that references the method to invoke when the operation is complete.

stateObject
Object Object Object Object

A user-defined object that contains information about the operation. This object is passed to the requestCallback delegate when the operation is complete.

Returns

An IAsyncResult instance that references the asynchronous request.

Exceptions

An error was encountered executing the DNS query.

Remarks

The asynchronous BeginGetHostByName operation must be completed by calling the EndGetHostByName method. Typically, the method is invoked by the requestCallback delegate.

This method does not block until the operation is complete. To block until the operation is complete, use the GetHostByName method.

For detailed information about using the asynchronous programming model, see Calling Synchronous Methods Asynchronously.

Note

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

Security

DnsPermission
for accessing DNS information. Associated enumeration: Unrestricted

Applies to

See also