C#ÏÂʵÏÖË«»º³åÃè»¸ßÆµÇúÏß(GDI+½áºÏGDI)
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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;//±»Ã軵Ŀؼþ¶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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if (((string)((ComboBoxItem)cmbField.SelectedItem).Value).Equals("System.DateTime"))
{
//ÅжÏÈÕÆÚµÄ;
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/// </summary>
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/// <param name="bitmap2">ͼƬ2</param>
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Graphics g = Graphics.fromImage(new Bitmap(1, 1));
SizeF size = g.MeasureString(lblTitle.Text, new Font("ËÎÌå", 24 * 0.0625F, FontStyle.Bold));
float oldSize=(800*0.0625F);//1px=0.0625em
float newSize = (0.75F/size.Width )* oldSize;
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