[转].NET 绘制 EAN13 (商品条码)
本文转自:http://blog.csdn.net/zgke/article/details/3496721
EAN商品条码的类
这个使用的比较多
其实 前面的编码是根据前面的6来判断的。是类型A还是类型B
效果
使用方法
- //获取验证位
- char _ISBN=MyImage.BandCode.EAN13.EAN13ISBN("690102803695");
- MessageBox.Show(_ISBN.ToString());
- MyImage.BandCode.EAN13 _EAN13Code = new MyImage.BandCode.EAN13();
- _EAN13Code.Magnify = 1;
- _EAN13Code.Heigth = 100;
- _EAN13Code.FontSize = 16;
- pictureBox1.Image=_EAN13Code.GetCodeImage("6901028036955");
- pictureBox1.Image.Save(@"C:/1.bmp");
具体绘制类
- using System;
- using System.Collections;
- using System.ComponentModel;
- using System.Drawing;
- using System.Data;
- namespace MyImage.BandCode
- {
- public class EAN13
- {
- private DataTable m_EAN13 = new DataTable();
- public EAN13()
- {
- m_EAN13.Columns.Add("ID");
- m_EAN13.Columns.Add("Type");
- m_EAN13.Columns.Add("A");
- m_EAN13.Columns.Add("B");
- m_EAN13.Columns.Add("C");
- m_EAN13.Rows.Add("0", "AAAAAA", "0001101", "0100111", "1110010");
- m_EAN13.Rows.Add("1", "AABABB", "0011001", "0110011", "1100110");
- m_EAN13.Rows.Add("2", "AABBAB", "0010011", "0011011", "1101100");
- m_EAN13.Rows.Add("3", "AABBBA", "0111101", "0100001", "1000010");
- m_EAN13.Rows.Add("4", "ABAABB", "0100011", "0011101", "1011100");
- m_EAN13.Rows.Add("5", "ABBAAB", "0110001", "0111001", "1001110");
- m_EAN13.Rows.Add("6", "ABBBAA", "0101111", "0000101", "1010000");
- m_EAN13.Rows.Add("7", "ABABAB", "0111011", "0010001", "1000100");
- m_EAN13.Rows.Add("8", "ABABBA", "0110111", "0001001", "1001000");
- m_EAN13.Rows.Add("9", "ABBABA", "0001011", "0010111", "1110100");
- }
- private uint m_Height = 40;
- /// <summary>
- /// 绘制高
- /// </summary>
- public uint Heigth { get { return m_Height; } set { m_Height = value; } }
- private byte m_FontSize = 0;
- /// <summary>
- /// 字体大小(宋体)
- /// </summary>
- public byte FontSize { get { return m_FontSize; } set { m_FontSize = value; } }
- private byte m_Magnify = 0;
- /// <summary>
- /// 放大系数
- /// </summary>
- public byte Magnify { get { return m_Magnify; } set { m_Magnify = value; } }
- public Bitmap GetCodeImage(string p_Text)
- {
- if (p_Text.Length != 13) throw new Exception("数字不是13位!");
- string _CodeText = p_Text.Remove(0, 1);
- string _CodeIndex = "101";
- char[] _LeftType = GetValue(p_Text.Substring(0, 1), "Type").ToCharArray();
- for (int i = 0; i != 6; i++)
- {
- _CodeIndex += GetValue(_CodeText.Substring(0, 1), _LeftType[i].ToString());
- _CodeText = _CodeText.Remove(0, 1);
- }
- _CodeIndex += "01010";
- for (int i = 0; i != 6; i++)
- {
- _CodeIndex += GetValue(_CodeText.Substring(0, 1), "C");
- _CodeText = _CodeText.Remove(0, 1);
- }
- _CodeIndex += "101";
- return GetImage(_CodeIndex, p_Text);
- }
- /// <summary>
- /// 获取目标对应的数据
- /// </summary>
- /// <param name="p_Code">编码</param>
- /// <param name="p_Value">类型</param>
- /// <returns>编码</returns>
- private string GetValue(string p_Value, string p_Type)
- {
- if (m_EAN13 == null) return "";
- DataRow[] _Row = m_EAN13.Select("ID='" + p_Value + "'");
- if (_Row.Length != 1) throw new Exception("错误的编码" + p_Value.ToString());
- return _Row[0][p_Type].ToString();
- }
- /// <summary>
- /// 绘制编码图形
- /// </summary>
- /// <param name="p_Text">编码</param>
- /// <returns>图形</returns>
- private Bitmap GetImage(string p_Text,string p_ViewText)
- {
- char[] _Value = p_Text.ToCharArray();
- int _FontWidth = 0;
- Font _MyFont = null;
- if (m_FontSize != 0)
- {
- #region 获取符合大小的字体
- _MyFont = new Font("宋体", m_FontSize);
- Bitmap _MyFontBmp = new Bitmap(m_FontSize, m_FontSize);
- Graphics _FontGraphics = Graphics.FromImage(_MyFontBmp);
- for (byte i = m_FontSize; i != 0; i--)
- {
- SizeF _DrawSize = _FontGraphics.MeasureString(p_ViewText.Substring(0, 1), _MyFont);
- if (_DrawSize.Height > m_FontSize)
- {
- _MyFont = new Font("宋体", i);
- }
- else
- {
- _FontWidth = (int)_DrawSize.Width;
- break;
- }
- }
- #endregion
- }
- if (ScanDrawText(_MyFont, p_Text, _FontWidth) == false)
- {
- _FontWidth = 0;
- m_FontSize = 0;
- }
- //宽 == 需要绘制的数量*放大倍数 + 两个字的宽
- Bitmap _CodeImage = new Bitmap(_Value.Length * ((int)m_Magnify + 1) + (_FontWidth * 2), (int)m_Height);
- Graphics _Garphics = Graphics.FromImage(_CodeImage);
- _Garphics.FillRectangle(Brushes.White, new Rectangle(0, 0, _CodeImage.Width, _CodeImage.Height));
- int _Height = 0;
- int _LenEx = _FontWidth;
- for (int i = 0; i != _Value.Length; i++)
- {
- int _DrawWidth = m_Magnify + 1;
- if (i == 0 || i == 2 || i==46 || i==48 || i==92 || i==94)
- {
- _Height = (int)m_Height;
- }
- else
- {
- _Height = (int)m_Height - m_FontSize;
- }
- if (_Value[i] == '1')
- {
- _Garphics.FillRectangle(Brushes.Black, new Rectangle(_LenEx, 0, _DrawWidth, _Height));
- }
- else
- {
- _Garphics.FillRectangle(Brushes.White, new Rectangle(_LenEx, 0, _DrawWidth, _Height));
- }
- _LenEx += _DrawWidth;
- }
- //绘制文字
- if (_FontWidth != 0 && m_FontSize != 0)
- {
- int _StarX = 0;
- int _StarY=(int)m_Height - _MyFont.Height;
- _Garphics.DrawString(p_ViewText.Substring(0, 1), _MyFont, Brushes.Black, 0, _StarY);
- _StarX = _FontWidth + (3 * (m_Magnify + 1));
- _Garphics.DrawString(p_ViewText.Substring(1, 6), _MyFont, Brushes.Black, _StarX, _StarY);
- _StarX = _FontWidth + (50 * (m_Magnify + 1));
- _Garphics.DrawString(p_ViewText.Substring(7, 6), _MyFont, Brushes.Black, _StarX, _StarY);
- }
- _Garphics.Dispose();
- return _CodeImage;
- }
- /// <summary>
- /// 判断字体是否大与绘制图形
- /// </summary>
- /// <param name="_MyFont">字体</param>
- /// <param name="p_Text">文字</param>
- /// <param name="p_Width">字体的宽</param>
- /// <returns>true可以绘制 False不可以绘制</returns>
- private bool ScanDrawText(Font _MyFont,string p_Text,int p_Width)
- {
- if(_MyFont==null)return false;
- int _Width = (p_Text.Length - 6 - 5) * ((int)m_Magnify + 1);
- if ((p_Width*12) > _Width) return false;
- return true;
- }
- /// <summary>
- /// 获得条码的最后一位(验证位)
- /// </summary>
- /// <param name="ANumbers">条码</param>
- /// <returns></returns>
- public static char EAN13ISBN(string _Numb)
- {
- int _Sum = 0;
- int _i = 1; //权值
- foreach (char _Char in _Numb)
- {
- if ("0123456789".IndexOf(_Char) < 0) continue; // 非数字
- _Sum += (_Char - '0') * _i;
- _i = _i == 1 ? 3 : 1;
- }
- return "01234567890"[10 - _Sum % 10];
- }
- }
- }
posted on 2012-11-23 13:43 freeliver54 阅读(945) 评论(0) 编辑 收藏 举报