Metafile.PlayRecord-Methode

Gibt einen einzelnen Metadateidatensatz wieder.

Namespace: System.Drawing.Imaging
Assembly: System.Drawing (in system.drawing.dll)

Syntax

'Declaration
Public Sub PlayRecord ( _
    recordType As EmfPlusRecordType, _
    flags As Integer, _
    dataSize As Integer, _
    data As Byte() _
)
'Usage
Dim instance As Metafile
Dim recordType As EmfPlusRecordType
Dim flags As Integer
Dim dataSize As Integer
Dim data As Byte()

instance.PlayRecord(recordType, flags, dataSize, data)

public void PlayRecord (
    EmfPlusRecordType recordType,
    int flags,
    int dataSize,
    byte[] data
)

public:
void PlayRecord (
    EmfPlusRecordType recordType, 
    int flags, 
    int dataSize, 
    array<unsigned char>^ data
)

public void PlayRecord (
    EmfPlusRecordType recordType, 
    int flags, 
    int dataSize, 
    byte[] data
)

public function PlayRecord (
    recordType : EmfPlusRecordType, 
    flags : int, 
    dataSize : int, 
    data : byte[]
)

Parameter

• recordType
  Element von EmfPlusRecordType, das den Typ des wiedergegebenen Metadateidatensatzes angibt.

• flags
  Ein Satz von Flags, die Attribute des Datensatzes angeben.

• dataSize
  Die Anzahl von Bytes in den Daten des Datensatzes.

• data
  Ein Bytearray, das die Daten des Datensatzes enthält.

Beispiel

Im folgenden Codebeispiel wird die Verwendung der PlayRecord-Methode veranschaulicht.

Imports System
Imports System.Drawing
Imports System.Drawing.Imaging
Imports System.Windows.Forms
' for Marshal.Copy
Imports System.Runtime.InteropServices


Public Class Form1
    Inherits Form
    Private metafile1 As Metafile
    Private metafileDelegate As Graphics.EnumerateMetafileProc
    Private destPoint As Point
    
    Public Sub New() 
        metafile1 = New Metafile("C:\test.wmf")
        metafileDelegate = New Graphics.EnumerateMetafileProc(AddressOf MetafileCallback)
        destPoint = New Point(20, 10)
    
    End Sub
    
    Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs) 
        e.Graphics.EnumerateMetafile(metafile1, destPoint, metafileDelegate)
    
    End Sub
    
    Private Function MetafileCallback(ByVal recordType As _
        EmfPlusRecordType, ByVal flags As Integer, ByVal dataSize As Integer, _
        ByVal data As IntPtr, ByVal callbackData As PlayRecordCallback) As Boolean

        Dim dataArray As Byte() = Nothing
        If data <> IntPtr.Zero Then

            ' Copy the unmanaged record to a managed byte buffer 
            ' that can be used by PlayRecord.
            dataArray = New Byte(dataSize) {}
            Marshal.Copy(data, dataArray, 0, dataSize)
        End If

        metafile1.PlayRecord(recordType, flags, dataSize, dataArray)
        Return True

    End Function
    
    Shared Sub Main() 
        Application.Run(New Form1())
    End Sub

End Class

using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.Windows.Forms;

// for Marshal.Copy
using System.Runtime.InteropServices; 

public class Form1 : Form
{
    private Metafile metafile1;
    private Graphics.EnumerateMetafileProc metafileDelegate;
    private Point destPoint;
    public Form1()
    {
        metafile1 = new Metafile(@"C:\Test.wmf");
        metafileDelegate = new Graphics.EnumerateMetafileProc(MetafileCallback);
        destPoint = new Point(20, 10);
    }
    protected override void OnPaint(PaintEventArgs e)
    {
        e.Graphics.EnumerateMetafile(metafile1, destPoint, metafileDelegate);
    }
    private bool MetafileCallback(
       EmfPlusRecordType recordType,
       int flags,
       int dataSize,
       IntPtr data,
       PlayRecordCallback callbackData)
    {
        byte[] dataArray = null;
        if (data != IntPtr.Zero)
        {
            // Copy the unmanaged record to a managed byte buffer 
            // that can be used by PlayRecord.
            dataArray = new byte[dataSize];
            Marshal.Copy(data, dataArray, 0, dataSize);
        }

        metafile1.PlayRecord(recordType, flags, dataSize, dataArray);

        return true;
    }

    static void Main()
    {
        Application.Run(new Form1());
    }
}

Plattformen

Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

.NET Framework unterstützt nicht alle Versionen sämtlicher Plattformen. Eine Liste der unterstützten Versionen finden Sie unter Systemanforderungen.

Versionsinformationen

.NET Framework

Unterstützt in: 2.0, 1.1, 1.0

Siehe auch

Referenz

Metafile-Klasse
Metafile-Member
System.Drawing.Imaging-Namespace