Metafile.PlayRecord(EmfPlusRecordType, Int32, Int32, Byte[]) Méthode

Définition

Espace de noms:

System.Drawing.Imaging

Assembly:

System.Drawing.Common.dll

Paquet:

System.Drawing.Common v8.0.0

Source:

Metafile.cs

Lit un enregistrement de métafichier.

public:
 void PlayRecord(System::Drawing::Imaging::EmfPlusRecordType recordType, int flags, int dataSize, cli::array <System::Byte> ^ data);

public void PlayRecord (System.Drawing.Imaging.EmfPlusRecordType recordType, int flags, int dataSize, byte[] data);

member this.PlayRecord : System.Drawing.Imaging.EmfPlusRecordType * int * int * byte[] -> unit

Public Sub PlayRecord (recordType As EmfPlusRecordType, flags As Integer, dataSize As Integer, data As Byte())

Paramètres

recordType

EmfPlusRecordType

Élément de EmfPlusRecordType qui spécifie le type d'enregistrement de métafichier en cours de lecture.

flags

Int32

Ensemble d'indicateurs qui spécifie des attributs de l'enregistrement.

dataSize

Int32

Nombre d'octets dans les données de l'enregistrement.

data

Byte[]

Tableau d'octets qui contient les données de l'enregistrement.

Exemples

L'exemple de code suivant illustre l'utilisation de la méthode PlayRecord.

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());
    }
}

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