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DevicePacketStream 類別

更新:2007 年 11 月

藉由讀取及寫入型別 Packet 的物件,在桌上型電腦應用程式和裝置之間交換資料。

命名空間:  Microsoft.SmartDevice.Connectivity
組件:  Microsoft.SmartDevice.Connectivity (在 Microsoft.SmartDevice.Connectivity.dll 中)

語法

Public Class DevicePacketStream

Dim instance As DevicePacketStream
public class DevicePacketStream
public ref class DevicePacketStream
public class DevicePacketStream

備註

這個類別沒有任何建構函式 (Constructor)。若要取得執行個體 (Instance),請連接至 Device,建立並啟動 RemoteAgent,然後呼叫 CreatePacketStream

範例

Imports System
Imports System.Collections.ObjectModel
Imports Microsoft.SmartDevice.Connectivity



Class [source]

    Shared Sub Main(ByVal args() As String) 
        ' Get the datastore object
        Dim dsmgr As New DatastoreManager(1033)

        ' Get the platform object
        Dim platform As Platform = GetPlatformByName("Windows Mobile 5.0 Smartphone SDK", dsmgr)

        ' Get the default device in the platform, usually an emulator.
        Dim device As Device = platform.GetDevice(platform.GetDefaultDeviceId())

        device.Connect()

        If device.IsConnected() Then
            ' Copy and start a device agent based on the ID of its add-on package.
            Dim ra As RemoteAgent = device.GetRemoteAgent( _
                New ObjectId("CAF078AE-2E10-43e2-B566-C4577F2538C7"))
            ra.Start("command line argument")
            ' Open communication channel with device agent.
            Dim ps As DevicePacketStream = ra.CreatePacketStream( _
                New ObjectId("2FAD740C-B5D3-4ad0-BE23-5682503584BF"))

            ' Create and write a packet of data.
            Dim packet As Packet
            packet = New Packet()
            Dim i As Integer
            For i = 0 To 3
                packet.WriteInt32(i)
            Next i
            packet.WriteString("Hello Smart Device")
            ps.Write(packet)
            ' While stream is connected, try to read a packet.
            While ps.IsConnected()
                If ps.IsPacketAvailable() Then
                    packet = ps.Read()
                    While Not packet.IsEndOfPacket()
                        Select Case packet.ReadDataType()
                            Case DataType.BoolType
                                Dim boolValue As Boolean = packet.ReadBool()
                            Case DataType.ByteArrayType
                                Dim buffer As Byte() = packet.ReadBytes()
                            Case DataType.ByteType
                                Dim byteValue As Byte = packet.ReadByte()
                            Case DataType.CharType
                                Dim charValue As Char = packet.ReadChar()
                            Case DataType.Int32Type
                                Console.WriteLine("Int32Type:  " + packet.ReadInt32().ToString())
                            Case DataType.StringType
                                Console.WriteLine("String:  " + packet.ReadString())
                            Case Else
                        End Select
                    End While
                    Exit While
                End If
                System.Threading.Thread.Sleep(1000)
            End While
            ps.Close()
            device.Disconnect()
            Console.ReadLine()
        End If

    End Sub 'Main

    ' Returns a platform if the supplied name can be found in the datastore.
    ' Returns null pointer if platform cannot be found
    Private Shared Function GetPlatformByName(ByVal p As String, _
                                              ByVal dsmgr As DatastoreManager) As Platform
        ' Get all platforms in the datastore.
        Dim platforms As Collection(Of Platform) = dsmgr.GetPlatforms()

        ' Find the platform whose name matches the parameter.
        Dim platform As Platform
        For Each platform In platforms
            If platform.Name = p Then
                Return platform
            End If
        Next platform
        Return Nothing

    End Function 'GetPlatformByName
End Class '[source]
using System;
using System.Collections.ObjectModel;
using Microsoft.SmartDevice.Connectivity;

class source
{
    static void Main(string[] args)
    {
         // Get the datastore object
        DatastoreManager dsmgr = new DatastoreManager(1033);

        // Get the platform object
        Platform platform = GetPlatformByName("Windows Mobile 5.0 Smartphone SDK", dsmgr);

        // Get the default device in the platform, usually an emulator.
        Device device = platform.GetDevice(platform.GetDefaultDeviceId());

        device.Connect();

        if (device.IsConnected())
        {
            // Copy and start a device agent  based on the ID of its add-on package.
            RemoteAgent ra = device.GetRemoteAgent(
                new ObjectId("CAF078AE-2E10-43e2-B566-C4577F2538C8"));
            ra.Start("command line argument");

            // Open communication channel with device agent.
            DevicePacketStream ps = ra.CreatePacketStream(
                new ObjectId("2FAD740C-B5D3-4ad0-BE23-5682503584BF"));

            // Create and write a packet of data.
            Packet packet;
            packet = new Packet();
            for (int i = 0; i < 4; i ++) packet.WriteInt32(i);
            packet.WriteString("Hello Smart Device");
            ps.Write(packet);

            // While stream is connected, try to read a packet.
            while (ps.IsConnected())
            {
                if (ps.IsPacketAvailable())
                {
                    packet = ps.Read();
                    while (!packet.IsEndOfPacket())
                    {
                        switch (packet.ReadDataType())
                        {
                            case DataType.BoolType:
                                bool boolValue = packet.ReadBool();
                                break;
                            case DataType.ByteArrayType:
                                byte[] buffer = packet.ReadBytes();
                                break;
                            case DataType.ByteType:
                                byte byteValue = packet.ReadByte();
                                break;
                            case DataType.CharType:
                                char charValue = packet.ReadChar();
                                break;
                            case DataType.Int32Type:
                                Console.WriteLine("Int32Type:  " + packet.ReadInt32().ToString());
                                break;
                            case DataType.StringType:
                                Console.WriteLine("String:  " + packet.ReadString());
                                break;
                            default:
                                break;
                        }
                    }
                    break;
                }
                System.Threading.Thread.Sleep(1000);
            }
            ps.Close();
            device.Disconnect();
            Console.ReadLine();
        }

    }

    // Returns a platform if the supplied name can be found in the datastore.
    // Returns null pointer if platform cannot be found
    private static Platform GetPlatformByName(string p, DatastoreManager dsmgr)
    {
        // Get all platforms in the datastore.
        Collection<Platform> platforms = dsmgr.GetPlatforms();

        // Find the platform whose name matches the parameter.
        foreach (Platform platform in platforms)
        {
            if (platform.Name == p) return platform;
        }
        return null;

    }
}

繼承階層架構

System.Object
  Microsoft.SmartDevice.Connectivity.DevicePacketStream

執行緒安全

這個型別的任何 Public static (在 Visual Basic 中為 Shared) 成員都具備執行緒安全。並非所有的執行個體成員都是安全執行緒。

請參閱

參考

DevicePacketStream 成員

Microsoft.SmartDevice.Connectivity 命名空間