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ÓÉÓÚÏîÄ¿ÐèÒª,ҪʹÓÃc#Ãè»­¸ßƵʵʱÇúÏß.
µ«ÊÇÔÚC#ÏÂÓÉÓÚÃ軭ͼÏñʹÓõÄÊÇGDI+,Ã軭ЧÂʺÜÓÐÎÊÌâ.Ò»µ©ÇúÏßÌ«¶à,¾Í»áÔì³ÉCPUʹÓÃÂÊÖ±ÏßÉÏÉý,ÂíÉÏì­Éýµ½100%.
ÔÚGDI+ÏÂʹÓÃË«»º³åÒ²ÎÞ¼ÃÓÚÊÂ,Ë«»º³å±¾ÉíÖ»»á½â¾öÇúÏß¶àµÄʱºòÈ«ÆÁÉÁ˸ÎÊÌâ,µ«Ã軭ЧÂÊ»¹ÊÇÑÏÖØµÍÏÂ.
Æä¼äÓùý¶àÖÖ½â¾ö·½°¸:DRECT3D,DRIRECT2D,GDI,,,,,µÈµÈµÈµÈ
×îºó´ÓЧÂʳö·¢,×îÖÕ½â¾ö·½°¸ÈçÏÂ:
ǰ̨ÏÔʾʹÓÃGDI,¶øºǫ́Ãè»­Ôò²ÉÓÃGDI+
ºǫ́²ÉÓÃ10±¶ÓÚǰ̨´°¿ÚµÄBUFFER,ÿ´ÎÏòÆäÖл­Ò»ÌõÏß.È»ºóͨ¹ýÒ»¸öRECTÊÓ¿Ú,ÿ´ÎÏòǰ̨ÏÔʾÊÓ¿ÚÀïµÄÄÚÈÝ.·ñÔòÿ´ÎÖØ»æµÄ´ú¼ÛÌ«¸ß.
Õâ¸ö·½·¨ÊµÏÖµÄÄѵãÖ÷ÒªÔÚÓÚGDIºÍGDI+µÄ½áºÏ²¿·Ö,Ö÷Òª´úÂëÈçÏÂ:
1.º¯Êý¿â:using ºÍ WIN32APIº¯Êý
using System.Runtime.InteropServices;
using System.Drawing;
using System.Drawing.Imaging;
using System.Drawing.Drawing2D;
using System.Drawing.Text;
[DllImport("gdi32")]
public static extern IntPtr CreateCompatibleDC(IntPtr hdc);
[DllImport("gdi32")]
public static extern IntPtr SelectObject(IntPtr hdc, IntPtr hObject);
[DllImport("GDI32.dll")]
public static extern long BitBlt(IntPtr hdcDest, int nXDest, int nYDest, int nWidth, int nHeight, IntPtr hdcSrc, int nXSrc, int nYSrc, int dwRop);
[DllImport("GDI32.dll")]
public static extern bool DeleteObject(IntPtr hObject);
2.ÉùÃ÷¶ÔÏó
public PictureBox _backgroundGraph;//±»Ãè»­µÄ¿Ø¼þ¶ÔÏó
//public Form _backgroundGraph;
public Graphics _backgroundGraphic = null; // ±³¾°Graphic
public Graphics _backgroundRenderGraphic = null; // Ë«»º³åGraphic
private Graphics _backgroundMemoryGraphic = null; // ÄÚ´æGraphic
public Graphics _backgroundDrawGraphic = null; // Ãè»­Graphic
private Bitmap _backgroundMemoryBitmap = null; // ÄÚ´æBitmap
public BufferedGraphics _graphicsBuffer = null; // Ë«»º³åBufferedGraphics
private IntPtr _memoryGraphicHdc; // ÄÚ´æGraphicÊÊÓõÄÒýÓÃ
private IntPtr _memoryBitmapHdc; // ÄÚ´æBitmapÊÊÓõÄÒýÓÃ
3.³õʼ»¯¶ÔÏó
   public void InitDraw()
        {
            _backgroundGraph = pictu


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 public class ValidateCode : System.Web.UI.Page
 {
  private void Page_Load(object sender, System.EventArgs e)
  {
   this.CreateCheckCodeImage(GenerateCheckCode());
  }
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