Dns.BeginGetHostEntry Method (IPAddress, AsyncCallback, Object)
Asynchronously resolves an IP address to an IPHostEntry instance.
Assembly: System (in System.dll)
[<HostProtectionAttribute(SecurityAction.LinkDemand, ExternalThreading = true)>] static member BeginGetHostEntry : address:IPAddress * requestCallback:AsyncCallback * stateObject:Object -> IAsyncResult
- Type: System.Net.IPAddress
The IP address to resolve.
- Type: System.AsyncCallback
An AsyncCallback delegate that references the method to invoke when the operation is complete.
- Type: System.Object
A user-defined object that contains information about the operation. This object is passed to the requestCallback delegate when the operation is complete.
The BeginGetHostEntry method asynchronously queries a DNS server for the IP addresses and aliases associated with an IP address.
Note This member emits trace information when you enable network tracing in your application. For more information, see Network Tracing.
This method does not block until the operation is complete. To block until the operation is complete, use the GetHostEntry method.
For detailed information about using the asynchronous programming model, see Calling Synchronous Methods Asynchronously
The HostProtectionAttribute attribute applied to this type or member has the following Resources property value: ExternalThreading. The HostProtectionAttribute does not affect desktop applications (which are typically started by double-clicking an icon, typing a command, or entering a URL in a browser). For more information, see the HostProtectionAttribute class or SQL Server Programming and Host Protection Attributes.
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.