版权声明：本文为starfd原创文章，转载请标明出处。 https://blog.csdn.net/starfd/article/details/7168895
Code128抽象类，设计思路是采用模板，C#的Drawing还是不熟悉，开始用了Pen画竖条，然后出来的图扫描枪根本不认，最后参考了网上已有的条形码写法，采用SetPixel方法，目前生成的Code128码扫描枪可以正确读取，但条形码的尺寸标准还没遵循，有待改进，在编写完GS1-128部分后，会来修改此部分图片代码
/// <summary>
/// Code128抽象类
/// </summary>
public abstract class absCode128 : IBarCode
{
protected string _encodedData;//编码数据
protected string _rawData;//原始数据
protected string _presentationData = null;//在条形码下面显示给人看的数据，如果为空，则取原始数据
protected bool _dataDisplay = true;//是否显示字体
protected byte _barCellWidth = 1;//模块单位宽度，单位Pix 默认1
protected bool _showBlank = true;//是否显示左右空白
protected byte _horizontalMulriple = 10;//水平左右空白对应模块的倍数
protected byte _verticalMulriple = 8;//垂直上下空白对应模块的倍数
protected byte _barHeight = 32;//条码高度，单位Pix 默认32
protected Color _backColor = Color.White;//条码背景色
protected Color _barColor = Color.Black;//条码颜色
protected byte _fontPadding;//字体与条形码的空间间隔
protected float _emSize;//字体大小
protected FontFamily _fontFamily;//字体样式
protected FontStyle _fontStyle;//字体样式
protected StringAlignment _textAlignment;//字体布局位置
protected Color _fontColor;//字体颜色
protected bool _fontPositionOnBottom;//字体位置是否是底部，如果不是，则在顶部
/// <summary>
/// 当前条形码种类
/// </summary>
public string BarCodeType
{
get
{
return System.Reflection.MethodBase.GetCurrentMethod().DeclaringType.Name;
}
}
/// <summary>
/// 原始数据
/// </summary>
public string RawData
{
get { return this._rawData; }
}
/// <summary>
/// 条码展示数据
/// </summary>
public string PresentationData
{
get { return string.IsNullOrEmpty(this._presentationData) ? this._rawData : this._presentationData; }
}
/// <summary>
/// 条形码对应的编码数据
/// </summary>
public string EncodedData
{
get { return this._encodedData; }
}
/// <summary>
/// 是否在条形码上显示展示数据
/// </summary>
public bool DataDisplay
{
get { return this._dataDisplay; }
set { this._dataDisplay = value; }
}
/// <summary>
/// 条码高度，必须至少是条码宽度的0.15倍或6.35mm，两者取大者
/// 默认按照实际为32,单位mm
/// </summary>
public byte BarHeight
{
get { return this._barHeight; }
set
{
this._barHeight = value;
}
}
/// <summary>
/// 模块宽度 单位：pix
/// 默认宽度 1pix
/// </summary>
public byte BarCellWidth
{
get { return this._barCellWidth; }
set
{
if (value == 0)
{
this._barCellWidth = 1;
}
else
{
this._barCellWidth = value;
}
}
}
/// <summary>
/// 是否显示左右空白，默认标准显示
/// </summary>
public bool ShowBlank
{
get { return this._showBlank; }
set
{
this._showBlank = value;
}
}
/// <summary>
/// 左右空白对应模块宽度的倍数,国际标准最小为10，如果低于10，则取10
/// </summary>
public byte HorizontalMulriple
{
get { return this._horizontalMulriple; }
set
{
if (value < 10)
{
this._horizontalMulriple = 10;
}
else
{
this._horizontalMulriple = value;
}
}
}
/// <summary>
/// 水平空白pix
/// </summary>
public int HorizontalMargin
{
get
{
if (this.ShowBlank)
{
return this._barCellWidth * this._horizontalMulriple;
}
else
{
return 0;
}
}
}
/// <summary>
/// 垂直上下空白对应模块的倍数
/// </summary>
public byte VerticalMulriple
{
get { return this._verticalMulriple; }
set
{
this._verticalMulriple = value;
}
}
/// <summary>
/// 垂直空白
/// </summary>
public int VerticalMargin
{
get
{
if (this.ShowBlank)
{
return this._barCellWidth * this._verticalMulriple;
}
else
{
return 0;
}
}
}
/// <summary>
/// 字体与条形码的空间间隔,单位Pix
/// </summary>
public byte FontPadding
{
get { return this._fontPadding; }
set
{
this._fontPadding = value;
}
}
/// <summary>
/// 字体大小
/// </summary>
public float FontSize
{
get { return this._emSize; }
set { this._emSize = value; }
}
/// <summary>
/// 字体样式
/// </summary>
public FontFamily FontFamily
{
get { return this._fontFamily; }
set { this._fontFamily = value; }
}
/// <summary>
/// 字体样式
/// </summary>
public FontStyle FontStyle
{
get { return this._fontStyle; }
set { this._fontStyle = value; }
}
/// <summary>
/// 字体布局位置
/// </summary>
public StringAlignment TextAlignment
{
get { return this._textAlignment; }
set { this._textAlignment = value; }
}
/// <summary>
/// 字体颜色
/// </summary>
public Color FontColor
{
get { return this._fontColor; }
set { this._fontColor = value; }
}
public absCode128(string rawData)
{
this._rawData = rawData;
if (string.IsNullOrEmpty(this._rawData))
{
throw new Exception("空字符串无法生成条形码");
}
this._rawData = this._rawData.Trim();
if (!this.RawDataCheck())
{
throw new Exception(rawData + " 不符合 " + this.BarCodeType + " 标准");
}
this._encodedData = this.GetEncodedData();
//是否加入检验可编码最大字符数超出标准48，貌似只在EAN128中有规定必须不超出48
this.FontInit();
}
/// <summary>
/// 字体初始化
/// </summary>
private void FontInit()
{
this._fontPadding = 4;
this._emSize = 12;
this._fontFamily = new FontFamily("Times New Roman");
this._fontStyle = FontStyle.Regular;
this._textAlignment = StringAlignment.Center;
this._fontColor = Color.Black;
}
protected int GetBarCodePhyWidth()
{
//在212222这种BS单元下，要计算bsGroup对应模块宽度的倍率
//应该要将总长度减去1（因为Stop对应长度为7），然后结果乘以11再除以6，与左右空白相加后再加上2（Stop比正常的BS多出2个模块组）
int bsNum = (this._encodedData.Length - 1) * 11 / 6 + 2;//+ (this._showBlank ? this._blankMulriple * 2 : 0)
return bsNum * this._barCellWidth;
}
/// <summary>
/// 数据输入正确性验证
/// </summary>
/// <returns></returns>
protected abstract bool RawDataCheck();
/// <summary>
/// 获取当前Data对应的编码数据(条空组合)
/// </summary>
/// <returns></returns>
protected abstract string GetEncodedData();
#region 注销
///// <summary>
///// 得到条形码对应的图片,Graphics画图的读不出来
///// </summary>
///// <returns></returns>
//public Image GetBarCodeImage()
//{
// float x, y;
// x = this._blockWidth * this._blankMulriple;
// y = x;
// Bitmap image = new Bitmap((int)this.GetBarCodePhyWidth() + 1, (int)(this._barHeight + y * 2) + 1);
// Graphics g = Graphics.FromImage(image);
// g.Clear(this._backColor);//清除背景
// g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
// g.PageUnit = GraphicsUnit.Display;
// Pen p = new Pen(this._barColor);
// for (int i = 0; i < this._encodedData.Length; i++)
// {
// byte num = (byte)char.GetNumericValue(this._encodedData[i]);
// if (i % 2 == 0)
// {
// //偶数位为bar,奇数位为sp,除了最后一个Stop，其他每个字符都是6位
// p.Width = num * this._blockWidth;
// g.DrawLine(p, x, y, x, y + this._barHeight);
// }
// x += num * this._blockWidth;
// }
// System.IO.MemoryStream ms = new System.IO.MemoryStream();
// image.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
// //结束绘制
// p.Dispose();
// g.Dispose();
// image.Dispose();
// return Image.FromStream(ms);
//}
#endregion
/// <summary>
/// 获取完整的条形码
/// </summary>
/// <returns></returns>
public Image GetBarCodeImage()
{
Image barImage = this.GetBarOnlyImage();
int width = barImage.Width;
int height = barImage.Height;
width += this.HorizontalMargin * 2;
height += this.VerticalMargin * 2;
if (this._dataDisplay)
{
height += this._fontPadding + (int)this._emSize;
}
Image image = new Bitmap(width, height);
Graphics g = Graphics.FromImage(image);
g.Clear(this._backColor);
g.DrawImage(barImage, this.HorizontalMargin, this.VerticalMargin, barImage.Width, barImage.Height);
if (this._dataDisplay)
{
Font drawFont = new Font(this._fontFamily, this._emSize, this._fontStyle, GraphicsUnit.Pixel);
Brush drawBrush = new SolidBrush(this._fontColor);
StringFormat drawFormat = new StringFormat();
drawFormat.Alignment = this._textAlignment;
RectangleF reF = new RectangleF(0, barImage.Height + this.VerticalMargin + this._fontPadding, width, this._emSize);
g.DrawString(this.PresentationData, drawFont, drawBrush, reF, drawFormat);
drawFont.Dispose();
drawBrush.Dispose();
drawFormat.Dispose();
}
System.IO.MemoryStream ms = new System.IO.MemoryStream();
image.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
//结束绘制
g.Dispose();
image.Dispose();
return Image.FromStream(ms);
}
/// <summary>
/// 获取仅包含条形码的图像
/// </summary>
/// <returns></returns>
private Image GetBarOnlyImage()
{
int width = (int)this.GetBarCodePhyWidth();
Bitmap image = new Bitmap(width, this._barHeight);
int ptr = 0;
for (int i = 0; i < this._encodedData.Length; i++)
{
int w = (int)char.GetNumericValue(this._encodedData[i]);
w *= this._barCellWidth;
Color c = i % 2 == 0 ? this._barColor : this._backColor;
for (int j = 0; j < w; j++)
{
for (int h = 0; h < this._barHeight; h++)
{
image.SetPixel(ptr, h, c);
}
ptr++;
}
}
return image;
}
}