IPacket (Interfaz)
Actualización: noviembre 2007
Contiene datos y lo utilizan objetos que implementan IDevicePacketStream para transferir datos entre una aplicación de agente de dispositivos y un equipo de escritorio.
Espacio de nombres: Microsoft.SmartDevice.DeviceAgentTransport
Ensamblado: Microsoft.SmartDevice.DeviceAgentTransport (en Microsoft.SmartDevice.DeviceAgentTransport.dll)
Sintaxis
<GuidAttribute("2F6015CC-2710-4AA1-9408-EAD056B555E1")> _
<InterfaceTypeAttribute(ComInterfaceType.InterfaceIsIUnknown)> _
Public Interface IPacket
Dim instance As IPacket
[GuidAttribute("2F6015CC-2710-4AA1-9408-EAD056B555E1")]
[InterfaceTypeAttribute(ComInterfaceType.InterfaceIsIUnknown)]
public interface IPacket
[GuidAttribute(L"2F6015CC-2710-4AA1-9408-EAD056B555E1")]
[InterfaceTypeAttribute(ComInterfaceType::InterfaceIsIUnknown)]
public interface class IPacket
public interface IPacket
Comentarios
Para obtener un objeto que implementa esta interfaz, use PacketFactory.GetNewPacket.
Los objetos que implementan IPacket sólo pueden contener objetos del tipo byte, byte[], string, int y char. La interfaz no es extensible a los objetos personalizados de lectura y escritura. No obstante, los usuarios aún pueden transferir objetos personalizados a través de la secuencia dividiendo el tipo de datos personalizados en tipos de datos básicos o serializando los tipos de datos personalizados en una matriz de bytes.
Ejemplos
Imports System
Imports System.Collections.Generic
Imports System.Text
Imports Microsoft.SmartDevice.DeviceAgentTransport
Imports System.Windows.Forms
Class Program
<MTAThread()> _
Shared Sub Main(ByVal args() As String)
Dim serviceids(0 To 0) As String
serviceids(0) = "2FAD740C-B5D3-4ad0-BE23-5682503584BF"
' Get an instance of Device Agent Transport
Dim transport As IDeviceAgentTransport = _
DeviceAgentTransportFactory.GetAgentTransport()
' Register the callback object with the Device Agent Transport.
Dim shutdownCallback As New ShutdownCallback()
transport.RegisterShutdownCallback(shutdownCallback, shutdownCallback)
' Let the desktop application know that this device agent was deployed successfully
' and will handle the supplied list of service IDs.
transport.AcknowledgeLaunch(Convert.ToUInt32(serviceids.Length), serviceids)
' Open a communcation stream with desktop application on the service.
Dim packetStream As IDevicePacketStream
transport.AcceptConnectionEx(serviceids(0), packetStream)
Dim packet As IPacket
' Check for a packet while communication stream is connected.
While packetStream.IsConnected()
' If a packet is found, display the string and integer data.
If packetStream.IsPacketAvailable() Then
packetStream.Read(packet)
Dim sb As New StringBuilder()
While Not packet.IsEndOfPacket()
Select Case packet.ReadDataType()
Case DataType.BoolType
Dim boolValue As Boolean = packet.ReadBool()
Case DataType.ByteArrayType
' Read bytes and convert IntPtr to byte[]
Dim ptr As IntPtr
Dim size As System.UInt32 = 0
packet.ReadBytes(ptr, size)
Dim buffer As Byte() = InteropUtils.ConvertIntPtrToByteArray(ptr, _
Convert.ToInt32(size))
Case DataType.ByteType
Dim byteValue As Byte = packet.ReadByte()
Case DataType.CharType
Dim charValue As Char = packet.ReadChar()
Case DataType.Int32Type
sb.Append("Int32Type: " + packet.ReadInt32().ToString() + _
vbCr + vbLf)
Case DataType.StringType
sb.Append("String: " + packet.ReadString() + vbCr + vbLf)
Case Else
End Select
End While
MessageBox.Show(sb.ToString())
Exit While
End If
System.Threading.Thread.Sleep(1000)
End While
packet = PacketFactory.GetNewPacket()
' Write the version of .NET Compact Framework into the packet.
packet.WriteString("Hello Desktop Computer")
packet.WriteInt32(Environment.Version.Major)
packet.WriteInt32(Environment.Version.Minor)
packet.WriteInt32(Environment.Version.Build)
packet.WriteInt32(Environment.Version.Revision)
' Pass the packet to desktop application.
packetStream.Write(packet)
End Sub 'Main
End Class 'Program
' Define your own shutdown implementation
Class ShutdownCallback
Implements IAgentTransportShutdownCallback
Sub Shutdown(ByVal in_pUnknown As Object) _
Implements IAgentTransportShutdownCallback.Shutdown
' Insert cleanup code here
End Sub 'Shutdown
End Class 'ShutdownCallback
using System;
using System.Collections.Generic;
using System.Text;
using Microsoft.SmartDevice.DeviceAgentTransport;
using System.Windows.Forms;
class Program
{
[MTAThread]
static void Main(string[] args)
{
string[] serviceids = { "2FAD740C-B5D3-4ad0-BE23-5682503584BF" };
// Get an instance of Device Agent Transport
IDeviceAgentTransport transport = DeviceAgentTransportFactory.GetAgentTransport();
// Register the callback object with the Device Agent Transport.
ShutdownCallback shutdownCallback = new ShutdownCallback();
transport.RegisterShutdownCallback(shutdownCallback, shutdownCallback);
// Let the desktop application know that this device agent was deployed successfully
// and will handle the supplied list of service IDs.
transport.AcknowledgeLaunch(Convert.ToUInt32(serviceids.Length), serviceids);
// Open a communcation stream with desktop application on the service.
IDevicePacketStream packetStream;
transport.AcceptConnectionEx(serviceids[0], out packetStream);
IPacket packet;
// Check for a packet while communication stream is connected.
while (packetStream.IsConnected())
{
// If a packet is found, display the string and integer data.
if (packetStream.IsPacketAvailable())
{
packetStream.Read(out packet);
StringBuilder sb = new StringBuilder();
while (!packet.IsEndOfPacket())
{
switch (packet.ReadDataType())
{
case DataType.BoolType:
bool boolValue = packet.ReadBool();
break;
case DataType.ByteArrayType:
// Read bytes and convert IntPtr to byte[]
IntPtr ptr;
uint size = 0;
packet.ReadBytes(out ptr, out size);
byte[] buffer = InteropUtils.ConvertIntPtrToByteArray(ptr,
Convert.ToInt32(size));
break;
case DataType.ByteType:
byte byteValue = packet.ReadByte();
break;
case DataType.CharType:
char charValue = packet.ReadChar();
break;
case DataType.Int32Type:
sb.Append("Int32Type: " + packet.ReadInt32().ToString() + "\r\n");
break;
case DataType.StringType:
sb.Append("String: " + packet.ReadString() + "\r\n");
break;
default:
break;
}
}
MessageBox.Show(sb.ToString());
break;
}
System.Threading.Thread.Sleep(1000);
}
packet = PacketFactory.GetNewPacket();
// Write the version of .NET Compact Framework into the packet.
packet.WriteString("Hello Desktop Computer");
packet.WriteInt32(Environment.Version.Major);
packet.WriteInt32(Environment.Version.Minor);
packet.WriteInt32(Environment.Version.Build);
packet.WriteInt32(Environment.Version.Revision);
// Pass the packet to desktop application.
packetStream.Write(packet);
}
}
// Define your own shutdown implementation
class ShutdownCallback : IAgentTransportShutdownCallback
{
public void Shutdown(object in_pUnknown)
{
// Insert cleanup code here
}
}
Vea también
Referencia
Microsoft.SmartDevice.DeviceAgentTransport (Espacio de nombres)