Metafile.PlayRecord(EmfPlusRecordType, Int32, Int32, Byte[]) Method
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Plays an individual metafile record.
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())
Parameters
- recordType
- EmfPlusRecordType
Element of the EmfPlusRecordType that specifies the type of metafile record being played.
- flags
- Int32
A set of flags that specify attributes of the record.
- dataSize
- Int32
The number of bytes in the record data.
- data
- Byte[]
An array of bytes that contains the record data.
Examples
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
Applies to
שתף איתנו פעולה ב- GitHub
ניתן למצוא את המקור לתוכן זה ב- GitHub, שם ניתן גם ליצור ולסקור בעיות ולמשוך בקשות. לקבלת מידע נוסף, עיין במדריך התורמים שלנו.