Dns.BeginGetHostByName(String, AsyncCallback, Object) Method
Definition
Important
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Caution
BeginGetHostByName is obsoleted for this type, please use BeginGetHostEntry instead. https://go.microsoft.com/fwlink/?linkid=14202
Caution
BeginGetHostByName has been deprecated. Use BeginGetHostEntry instead.
Caution
BeginGetHostByName is obsoleted for this type, please use BeginGetHostEntry instead. http://go.microsoft.com/fwlink/?linkid=14202
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("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);[System.Obsolete("BeginGetHostByName has been deprecated. Use BeginGetHostEntry instead.")]
public static IAsyncResult BeginGetHostByName (string hostName, AsyncCallback? requestCallback, object? stateObject);[System.Obsolete("BeginGetHostByName is obsoleted for this type, please use BeginGetHostEntry instead. http://go.microsoft.com/fwlink/?linkid=14202")]
public static IAsyncResult BeginGetHostByName (string hostName, AsyncCallback requestCallback, object stateObject);[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);public static IAsyncResult BeginGetHostByName (string hostName, AsyncCallback requestCallback, object stateObject);[<System.Obsolete("BeginGetHostByName is obsoleted for this type, please use BeginGetHostEntry instead. https://go.microsoft.com/fwlink/?linkid=14202")>]
static member BeginGetHostByName : string * AsyncCallback * obj -> IAsyncResult[<System.Obsolete("BeginGetHostByName has been deprecated. Use BeginGetHostEntry instead.")>]
static member BeginGetHostByName : string * AsyncCallback * obj -> IAsyncResult[<System.Obsolete("BeginGetHostByName is obsoleted for this type, please use BeginGetHostEntry instead. http://go.microsoft.com/fwlink/?linkid=14202")>]
static member BeginGetHostByName : string * AsyncCallback * obj -> IAsyncResultstatic member BeginGetHostByName : string * AsyncCallback * obj -> IAsyncResultPublic Shared Function BeginGetHostByName (hostName As String, requestCallback As AsyncCallback, stateObject As Object) As IAsyncResultParameters
- hostName
- String
The DNS name of the host.
- requestCallback
- AsyncCallback
An AsyncCallback delegate that references the method to invoke when the operation is complete.
- stateObject
- 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.
- Attributes
Exceptions
hostName is null.
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.
