TcpClient.BeginConnect Method (IPAddress, Int32, AsyncCallback, Object)
Assembly: System (in System.dll)
[<HostProtectionAttribute(SecurityAction.LinkDemand, ExternalThreading = true)>] member BeginConnect : addresses:IPAddress * port:int * requestCallback:AsyncCallback * state:Object -> IAsyncResult
- Type: System.Int32
The port number of the remote hosts.
- 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 connect operation. This object is passed to the requestCallback delegate when the operation is complete.
The addresses parameter is a null reference (Nothing in Visual Basic).
An error occurred when attempting to access the socket. See the Remarks section for more information.
The Socket has been closed.
A caller higher in the call stack does not have permission for the requested operation.
The port number is not valid.
This method does not block until the operation completes. To block until the operation completes, use one of the Connect method overloads.
For detailed information about using the asynchronous programming model, see Calling Synchronous Methods Asynchronously.
This method is typically used immediately after a call to the BeginGetHostAddresses method, which can return multiple IP addresses for a single host.
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.