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

定義

命名空間:

System.Drawing.Imaging

組件:

System.Drawing.Common.dll

套件:

System.Drawing.Common v8.0.0

來源:

Metafile.cs

播放個別的中繼檔記錄。

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())

參數

recordType

EmfPlusRecordType

EmfPlusRecordType 的項目，指定正要播放之中繼檔記錄的類型。

flags

Int32

旗標集，指定記錄的屬性 (Attribute)。

dataSize

Int32

記錄資料中的位元組數目。

data

Byte[]

含有記錄資料的位元組陣列。

範例

下列程式碼範例會示範如何使用 PlayRecord 方法。

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