如何采用C#绘制39条形码

using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing;

namespace CjLibrary
{

public enum AlignType
{
Left = 0,
Right = 1,
Center = 2
}

public class CjBarCode
{
private AlignType align;

public AlignType Align
{
get { return align; }
set { align = value; }
}
private int leftMargin = 10;

public int LeftMargin
{
get { return leftMargin; }
set { leftMargin = value; }
}
private int topMargin = 10;

public int TopMargin
{
get { return topMargin; }
set { topMargin = value; }
}
private int barcodeHeight = 50;

public int BarcodeHeight
{
get { return barcodeHeight; }
set { barcodeHeight = value; }
}

private string headerText="浙江绍兴";

public string HeaderText
{
get { return headerText; }
set { headerText = value; }
}

private string barcodeText = "";

public string BarcodeText
{
get { return barcodeText; }
set { barcodeText = value; }
}

private bool showHeader;

public bool ShowHeader
{
get { return showHeader; }
set { showHeader = value; }
}

private bool showFooter;

public bool ShowFooter
{
get { return showFooter; }
set { showFooter = value; }
}

private int headerFontSize;

public int HeaderFontSize
{
get { return headerFontSize; }
set { headerFontSize = value; }
}
private int footerFontSize;

public int FooterFontSize
{
get { return footerFontSize; }
set { footerFontSize = value; }
}
private string headerFontFamily;

public string HeaderFontFamily
{
get { return headerFontFamily; }
set { headerFontFamily = value; }
}
private string footerFontFamily;

public string FooterFontFamily
{
get { return footerFontFamily; }
set { footerFontFamily = value; }
}

protected Font headerFont=null;
protected Font footerFont=null;

public CjBarCode()
{
align = AlignType.Center;
headerFontFamily = "Courier";
footerFontFamily = "Courier";
headerFontSize = 9;
footerFontSize = 9;
headerFont = new Font(headerFontFamily, headerFontSize);
footerFont = new Font(footerFontFamily, footerFontSize);

}

protected virtual void DrawBitmap(Graphics g, Rectangle rects)
{

SolidBrush brush = new SolidBrush(Color.PowderBlue);
g.FillRectangle(brush, rects);
}
protected virtual void DrawText(string text,Graphics g, Rectangle rects)
{
SolidBrush brush = new SolidBrush(Color.PowderBlue);
g.FillRectangle(brush, rects);
}

}

public class CjBarCode39 : CjBarCode
{

private double wideToNarrowRatio = 3.0;

public double WideToNarrowRatio
{
get { return wideToNarrowRatio; }
set { wideToNarrowRatio = value; }
}
private int weight = 1;

public int Weight
{
get { return weight; }
set { weight = value; }
}
/// <summary>
/// 39条码中能使用的字符
/// </summary>
private String alphabet39 = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ-. $/+%*";

private String[] coded39Char =
{
/* 0 */ "001100100",
/* 1 */ "100010100",
/* 2 */ "010010100",
/* 3 */ "110000100",
/* 4 */ "001010100",
/* 5 */ "101000100",
/* 6 */ "011000100",
/* 7 */ "000110100",
/* 8 */ "100100100",
/* 9 */ "010100100",
/* A */ "100010010",
/* B */ "010010010",
/* C */ "110000010",
/* D */ "001010010",
/* E */ "101000010",
/* F */ "011000010",
/* G */ "000110010",
/* H */ "100100010",
/* I */ "010100010",
/* J */ "001100010",
/* K */ "100010001",
/* L */ "010010001",
/* M */ "110000001",
/* N */ "001010001",
/* O */ "101000001",
/* P */ "011000001",
/* Q */ "000110001",
/* R */ "100100001",
/* S */ "010100001",
/* T */ "001100001",
/* U */ "100011000",
/* V */ "010011000",
/* W */ "110001000",
/* X */ "001011000",
/* Y */ "101001000",
/* Z */ "011001000",
/* - */ "000111000",
/* . */ "110000100",
/*' '*/ "011000100",
/* $ */ "010101000",
/* / */ "010100010",
/* + */ "010001010",
/* % */ "100101000",
/* * */ "001101000"
};
public CjBarCode39()
{
BarcodeText = "1234";
}
/// <summary>
/// 为了使得条形码居中先要计算条形码的Left和Top坐标
/// </summary>
/// <returns></returns>
private int getX()
{
int currentLocation = 0;
string strBarcode = "*" + BarcodeText.ToUpper() + "*";
for (int i = 0; i < strBarcode.Length; i++)
{
string encodedString = coded39Char[alphabet39.IndexOf(strBarcode[i])];

for (int j = 0; j < 5; j++)
{

if (encodedString[j] == '0')
{
currentLocation += weight;
}
else
{
currentLocation += 3 * weight;
}
//画第6个 5 白条
if ((j + 5) < 9)
{
if (encodedString[j + 5] == '0')
{
currentLocation += weight;
}
else
{
currentLocation += 3 * weight;
}
}
}
currentLocation += weight;
}
return currentLocation;
}
/// <summary>
/// 显示条形码
/// </summary>
/// <param name="g">GDI+</param>
/// <param name="rects">画图区域</param>
protected override void DrawBitmap(Graphics g, Rectangle rects)
{
if (BarcodeText == "") return;
string strBarcode = "*" + BarcodeText.ToUpper() + "*";
//string strBarcode = BarcodeText.ToUpper() ;
String encodedString = "";
int currentLocation =(rects.Width- getX())/2;
SolidBrush blackBrush = new SolidBrush(Color.Black);
SolidBrush witeBrush = new SolidBrush(Color.White);
int yTop = rects.Y;
for (int i = 0; i < strBarcode.Length; i++)
{
encodedString = coded39Char[alphabet39.IndexOf(strBarcode[i])];

for (int j = 0; j < 5; j++)
{

if (encodedString[j] == '0')
{
Rectangle re1 = new Rectangle(currentLocation, yTop, weight, BarcodeHeight);
g.FillRectangle(blackBrush, re1);
currentLocation += weight;
}
else
{
Rectangle re1 = new Rectangle(currentLocation, yTop, 3 * weight, BarcodeHeight);
g.FillRectangle(blackBrush, re1);
currentLocation += 3 * weight;
}
//画第6个 5 白条
if ((j + 5) < 9)
{
if (encodedString[j + 5] == '0')
{
Rectangle re1 = new Rectangle(currentLocation, yTop, weight, BarcodeHeight);
g.FillRectangle(witeBrush, re1);
currentLocation += weight;
}
else
{
Rectangle re1 = new Rectangle(currentLocation, yTop, 3 * weight, BarcodeHeight);
g.FillRectangle(witeBrush, re1);
currentLocation += 3 * weight;
}
}
}
Rectangle re2 = new Rectangle(currentLocation, yTop, weight, BarcodeHeight);
g.FillRectangle(witeBrush, re2);
currentLocation += weight;
}

}

/// <summary>
/// 显示条形码和文字
/// </summary>
/// <param name="g"></param>
/// <param name="rects"></param>
public void DrawBarcode(Graphics g, Rectangle rects)
{
SizeF hsize = g.MeasureString(HeaderText, this.headerFont);
SizeF fsize = g.MeasureString(BarcodeText, this.footerFont);
//HeadText
Rectangle t = new Rectangle();
t = rects;
t.Height = (int)hsize.Height;
t.X = (rects.Width - (int)hsize.Width) / 2;
DrawText(HeaderText, g, t);
//FootText
Rectangle b = new Rectangle();
b = rects;
b.Y = rects.Height - (int)fsize.Height;
b.X = (rects.Width - (int)fsize.Width) / 2;
b.Height = (int)fsize.Height;
DrawText("*" + BarcodeText + "*", g, b);
//BarCode
Rectangle m = new Rectangle();
m = rects;
m.Y = t.Height;
m.Height = rects.Height - t.Height - b.Height;
this.BarcodeHeight = m.Height;
DrawBitmap(g, m);
}
/// <summary>
/// 文本显示
/// </summary>
/// <param name="text"></param>
/// <param name="g"></param>
/// <param name="rects"></param>
protected override void DrawText(string text, Graphics g, Rectangle rects)
{
g.DrawString(text, this.headerFont, Brushes.Black, rects);
}

}
}