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PowerTCP Email Validation for .NET |
| Dart.PowerTCP.EmailValidation Namespace : DatagramEventArgs Class |
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PowerTCP Email Validation for .NET |
| Dart.PowerTCP.EmailValidation Namespace : DatagramEventArgs Class |
Provides data for any event where datagrams are sent or received.
For a list of all members of this type, see DatagramEventArgs members.
  
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System.Object
System.EventArgs
Dart.PowerTCP.EmailValidation.DatagramEventArgs
[Visual Basic]
Public Class DatagramEventArgs
Inherits EventArgs[C#]
public class DatagramEventArgs : EventArgs[C++]
public __gc class DatagramEventArgs : public EventArgs[C++/CLI]
public ref class DatagramEventArgs : public EventArgsA DatagramEventArgs object is passed as a parameter to all events that report the transfer of datagrams. This object contains a Datagram object that references the data sent/received.
If your code causes an exception, it would be returned to the handling event without you seeing it. To preclude such a condition, you should ALWAYS use a try/ catch block around your event-handling code.
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)
DatagramEventArgs Members | Dart.PowerTCP.EmailValidation Namespace
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Documentation version 1.0.3.0.
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