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

定义

命名空间:

System.Drawing.Imaging

程序集:

System.Drawing.Common.dll

包:

System.Drawing.Common v8.0.0

Source:

Metafile.cs

播放单个图元文件记录。

C#

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

参数

recordType

EmfPlusRecordType

指定正在播放的图元文件记录类型的 EmfPlusRecordType 的元素。

flags

Int32

指定记录属性的标志集。

dataSize

Int32

记录数据中的字节数。

data

Byte[]

包含记录数据的字节数组。

示例

下面的代码示例演示如何使用 PlayRecord 方法。

C#

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());
    }
}

适用于