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PowerTCP Email Validation for .NET |
| Dart.PowerTCP.EmailValidation Namespace : Datagram Class (Dart.PowerTCP.EmailValidation) |
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PowerTCP Email Validation for .NET |
| Dart.PowerTCP.EmailValidation Namespace : Datagram Class (Dart.PowerTCP.EmailValidation) |
Encapsulates a UDP datagram.
For a list of all members of this type, see Datagram members.
System.Object
Dart.PowerTCP.EmailValidation.Datagram
[Visual Basic]
Public Class Datagram [C#]
public class Datagram [C++]
public __gc class Datagram [C++/CLI]
public ref class Datagram When datagrams are sent or received using the Udp component, a Datagram object is returned describing the datagram sent. This Datagram object may be returned directly from the method (which is the case when using Udp.Send or Udp.Receive) or it may be part of associated event data (which is the case when using Udp.BeginSend or Udp.BeginReceive).
Access the properties of the Datagram object to get information about the datagram sent/received. For example, Datagram.Buffer contains the actual datagram data. Datagram.RemoteEndPoint contains the address/port of the remote host to which the datagram was sent or from which the datagram was received.
The following example demonstrates creating a UDP echo server application which listens for datagrams and echoes them back to the sender.
[Visual Basic]
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
' Listen for datagrams on port 7.
Udp1.Open(7)
' Begin an asynchronous Receive
Dim buffer(Udp1.BufferSize) As Byte
Udp1.BeginReceive(buffer)
End Sub
Private Sub Udp1_EndReceive(ByVal sender As Object, ByVal e As DatagramEventArgs) Handles Udp1.EndReceive
' Check for an Exception
If e.Exception is Nothing Then
' Echo the data back using the Datagram object passed into the event.
' Datagram.Buffer = data received from client
' Datagram.RemoteEndPoint = address/port of client.
Udp1.Send(e.Datagram.Buffer, e.Datagram.RemoteEndPoint)
End If
' Start receiving next
Dim buffer(Udp1.BufferSize) As Byte
Udp1.BeginReceive(buffer)
End Sub
[C#]
private void StartServer()
{
// Listen for datagrams on port 7.
udp1.Open(7);
// Begin an asynchronous Receive
byte[] buffer = new byte[udp1.BufferSize];
udp1.BeginReceive(buffer);
}
private void udp1_EndReceive(object
sender, DatagramEventArgs e)
{
// Check for an exception
if(e.Exception == null)
{
// Echo the data back using the Datagram object passed into the event.
// Datagram.Buffer = data received from client
// Datagram.RemoteEndPoint = address/port of client.
Datagram d = udp1.Send(e.Datagram.Buffer, e.Datagram.RemoteEndPoint);
}
// Start receiving next
byte[] buffer = new byte[udp1.BufferSize];
udp1.BeginReceive(buffer);
}
Namespace: Dart.PowerTCP.EmailValidation
Platforms: Windows 98, Windows NT 4.0, Windows ME, Windows 2000, Windows XP, Windows Server 2003, Windows Vista
Assembly: Dart.PowerTCP.EmailValidation (in Dart.PowerTCP.EmailValidation.dll)
Datagram Members | Dart.PowerTCP.EmailValidation Namespace
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Documentation version 1.0.3.0.
© 2008 Dart Communications. All rights reserved.