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


播放单个图元文件记录。Plays an individual metafile record.

 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())



指定正在播放的图元文件记录类型的 EmfPlusRecordType 的元素。Element of the EmfPlusRecordType that specifies the type of metafile record being played.


指定记录属性的标志集。A set of flags that specify attributes of the record.


记录数据中的字节数。The number of bytes in the record data.


包含记录数据的字节数组。An array of bytes that contains the record data.


下面的代码示例演示如何使用 PlayRecord 方法。The following code example demonstrates how to use the PlayRecord method.

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