.net 生成条形码

条形码生成类：

public class Code39
{
    private Hashtable m_Code39 = new Hashtable();
    private byte m_Magnify = 0;
    /// <summary>
    /// 放大倍数
    /// </summary>
    public byte Magnify { get { return m_Magnify; } set { m_Magnify = value; } }
    private int m_Height = 40;
    /// <summary>
    /// 图形高
    /// </summary>
    public int Height { get { return m_Height; } set { m_Height = value; } }

    private Font m_ViewFont = null;
    /// <summary>
    /// 字体大小
    /// </summary>
    public Font ViewFont { get { return m_ViewFont; } set { m_ViewFont = value; } }

    public Code39()
    {

        m_Code39.Add("A", "1101010010110");
        m_Code39.Add("B", "1011010010110");
        m_Code39.Add("C", "1101101001010");
        m_Code39.Add("D", "1010110010110");
        m_Code39.Add("E", "1101011001010");
        m_Code39.Add("F", "1011011001010");
        m_Code39.Add("G", "1010100110110");
        m_Code39.Add("H", "1101010011010");
        m_Code39.Add("I", "1011010011010");
        m_Code39.Add("J", "1010110011010");
        m_Code39.Add("K", "1101010100110");
        m_Code39.Add("L", "1011010100110");
        m_Code39.Add("M", "1101101010010");
        m_Code39.Add("N", "1010110100110");
        m_Code39.Add("O", "1101011010010");
        m_Code39.Add("P", "1011011010010");
        m_Code39.Add("Q", "1010101100110");
        m_Code39.Add("R", "1101010110010");
        m_Code39.Add("S", "1011010110010");
        m_Code39.Add("T", "1010110110010");
        m_Code39.Add("U", "1100101010110");
        m_Code39.Add("V", "1001101010110");
        m_Code39.Add("W", "1100110101010");
        m_Code39.Add("X", "1001011010110");
        m_Code39.Add("Y", "1100101101010");
        m_Code39.Add("Z", "1001101101010");
        m_Code39.Add("0", "1010011011010");
        m_Code39.Add("1", "1101001010110");
        m_Code39.Add("2", "1011001010110");
        m_Code39.Add("3", "1101100101010");
        m_Code39.Add("4", "1010011010110");
        m_Code39.Add("5", "1101001101010");
        m_Code39.Add("6", "1011001101010");
        m_Code39.Add("7", "1010010110110");
        m_Code39.Add("8", "1101001011010");
        m_Code39.Add("9", "1011001011010");
        m_Code39.Add("+", "1001010010010");
        m_Code39.Add("-", "1001010110110");
        m_Code39.Add("*", "1001011011010");
        m_Code39.Add("/", "1001001010010");
        m_Code39.Add("%", "1010010010010");
        m_Code39.Add("$", "1001001001010");
        m_Code39.Add(".", "1100101011010");
        m_Code39.Add(" ", "1001101011010");
    }

    public enum Code39Model
    {
        /// <summary>
        /// 基本类别 1234567890ABC
        /// </summary>
        Code39Normal,
        /// <summary>
        /// 全ASCII方式 +A+B 来表示小写
        /// </summary>
        Code39FullAscII
    }
    /// <summary>
    /// 获得条码图形
    /// </summary>
    /// <param name="p_Text">文字信息</param>
    /// <param name="p_Model">类别</param>
    /// <param name="p_StarChar">是否增加前后*号</param>
    /// <returns>图形</returns>
    public Bitmap GetCodeImage(string p_Text, Code39Model p_Model, bool p_StarChar)
    {
        string _ValueText = "";
        string _CodeText = "";
        char[] _ValueChar = null;
        switch (p_Model)
        {
            case Code39Model.Code39Normal:
                _ValueText = p_Text.ToUpper();
                break;
            default:
                _ValueChar = p_Text.ToCharArray();
                for (int i = 0; i != _ValueChar.Length; i++)
                {
                    if ((int)_ValueChar[i] >= 97 && (int)_ValueChar[i] <= 122)
                    {
                        _ValueText += "+" + _ValueChar[i].ToString().ToUpper();

                    }
                    else
                    {
                        _ValueText += _ValueChar[i].ToString();
                    }
                }
                break;
        }
        _ValueChar = _ValueText.ToCharArray();
        if (p_StarChar == true) _CodeText += m_Code39["*"];
        for (int i = 0; i != _ValueChar.Length; i++)
        {
            if (p_StarChar == true && _ValueChar[i] == '*') throw new Exception("带有起始符号不能出现*");
            object _CharCode = m_Code39[_ValueChar[i].ToString()];
            if (_CharCode == null) throw new Exception("不可用的字符" + _ValueChar[i].ToString());
            _CodeText += _CharCode.ToString();
        }
        if (p_StarChar == true) _CodeText += m_Code39["*"];

        Bitmap _CodeBmp = GetImage(_CodeText);
        GetViewImage(_CodeBmp, p_Text);
        return _CodeBmp;
    }

    /// <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)
    {
        char[] _Value = p_Text.ToCharArray();

        //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), (int)m_Height);
        Graphics _Garphics = Graphics.FromImage(_CodeImage);
        _Garphics.FillRectangle(Brushes.White, new Rectangle(0, 0, _CodeImage.Width, _CodeImage.Height));

        int _LenEx = 0;
        for (int i = 0; i != _Value.Length; i++)
        {
            int _DrawWidth = m_Magnify + 1;
            if (_Value[i] == '1')
            {
                _Garphics.FillRectangle(Brushes.Black, new Rectangle(_LenEx, 0, _DrawWidth, m_Height));
            }
            else
            {
                _Garphics.FillRectangle(Brushes.White, new Rectangle(_LenEx, 0, _DrawWidth, m_Height));
            }
            _LenEx += _DrawWidth;
        }

        _Garphics.Dispose();
        return _CodeImage;
    }

    /// <summary>
    /// 绘制文字
    /// </summary>
    /// <param name="p_CodeImage">图形</param>
    /// <param name="p_Text">文字</param>
    private void GetViewImage(Bitmap p_CodeImage, string p_Text)
    {
        if (m_ViewFont == null) return;
        Graphics _Graphics = Graphics.FromImage(p_CodeImage);
        SizeF _FontSize = _Graphics.MeasureString(p_Text, m_ViewFont);
        if (_FontSize.Width > p_CodeImage.Width || _FontSize.Height > p_CodeImage.Height - 20)
        {
            _Graphics.Dispose();
            return;
        }
        int _StarHeight = p_CodeImage.Height - (int)_FontSize.Height;
        _Graphics.FillRectangle(Brushes.White, new Rectangle(0, _StarHeight, p_CodeImage.Width, (int)_FontSize.Height));
        int _StarWidth = (p_CodeImage.Width - (int)_FontSize.Width) / 2;
        _Graphics.DrawString(p_Text, m_ViewFont, Brushes.Black, _StarWidth, _StarHeight);
        _Graphics.Dispose();
    }

}

调用：

Code39 _Code39 = new Code39();
        _Code39.Height = 120; //高度
        _Code39.Magnify = 1;  //放大倍数
        _Code39.ViewFont = new Font("宋体", 20);  // 设置字体

        var bitMap = _Code39.GetCodeImage("2019051585498221", Code39.Code39Model.Code39Normal, false);  // 根据传入的参数，生成对应的“位图”；
        bitMap.Save(@"D:\barcode.png", System.Drawing.Imaging.ImageFormat.Jpeg);   // 将“位图”保存到本地路径；