ASP.net(c#)生成条形码 code39条码生成方法

这几天一直在弄128条码的事情，找了相关的资料，也没找到。后来没办法只能改成code39的条码。现在把它写出来，与大家分享

1.先下载一种免费的 code39条码字体
2.建个类 为 code39 并写入以下代码

public sealed class code39
{
#region private variables
/// <summary>
/// the space between each of title, barcode, barcodestring
/// </summary>
private const int space_height = 3;
sizef _sizelabel = sizef.empty;
sizef _sizebarcodevalue = sizef.empty;
sizef _sizebarcodestring = sizef.empty;
#endregion
#region label
private string _label = null;
private font _labelfont = null;
/// <summary>
/// barcode title (条码标签)
/// </summary>
public string label
{
set { _label = value; }
}
/// <summary>
/// barcode title font (条码标签使用的字体)
/// </summary>
public font labelfont
{
get
{
if (_labelfont == null)
return new font("arial", 10);
return _labelfont;
}
set { _labelfont = value; }
}
#endregion
private string _additionalinfo = null;
private font _addtionalinfofont = null;
/// <summary>
/// additional info font (附加信息字体)
/// </summary>
public font additionalinfofont
{
set { _addtionalinfofont = value; }
get
{
if (_addtionalinfofont == null) return new font("arial", 10);
return _addtionalinfofont;
}
}
/// <summary>
/// additional info content, if "showbarcodevalue" is true, the info is unvisible
/// 附加信息，如果设置showbarcodevalue为true,则此项不显示
/// </summary>
public string additionalinfo
{
set { _additionalinfo = value; }
}
#region barcode value and font
private string _barcodevalue = null;
/// <summary>
/// barcode value (条码值)
/// </summary>
public string barcodevalue
{
get
{
if (string.isnullorempty(_barcodevalue))
throw new nullreferenceexception("the barcodevalue has not been set yet!");
return _barcodevalue;
}
set { _barcodevalue = value.startswith("*") && value.endswith("*") ? value : "*" + value + "*"; }
}
private bool _showbarcodevalue = false;
/// <summary>
/// whether to show the original string of barcode value bellow the barcode
/// 是否在条码下方显示条码值，默认为false
/// </summary>
public bool showbarcodevalue
{
set { _showbarcodevalue = value; }
}
private font _barcodevaluefont = null;
/// <summary>
/// the font of the codestring to show
/// 条码下方显示的条码值的字体
/// </summary>
public font barcodevaluefont
{
get
{
if (_barcodevaluefont == null)
return new font("arial", 10);
return _barcodevaluefont;
}
set { _barcodevaluefont = value; }
}
private int _barcodefontsize = 50;
/// <summary>
/// the font size of the barcode value to draw
/// 条码绘制的大小，默认50
/// </summary>
public int barcodefontszie
{
set { _barcodefontsize = value; }
}
#endregion
#region generate the barcode image
private bitmap blankbackimage
{
get
{
int barcodewidth = 0, barcodeheight = 0;
using (bitmap bmp = new bitmap(1, 1, pixelformat.format32bppargb))
{
using (graphics g = graphics.fromimage(bmp))
{
if (!string.isnullorempty(_label))
{
_sizelabel = g.measurestring(_label, labelfont);
barcodewidth = (int)_sizelabel.width;
barcodeheight = (int)_sizelabel.height + space_height;
}
_sizebarcodevalue = g.measurestring(barcodevalue, new font("free 3 of 9 extended", _barcodefontsize));
barcodewidth = math.max(barcodewidth, (int)_sizebarcodevalue.width);
barcodeheight += (int)_sizebarcodevalue.height;
if (_showbarcodevalue)
{
_sizebarcodestring = g.measurestring(_barcodevalue, barcodevaluefont);
barcodewidth = math.max(barcodewidth, (int)_sizebarcodestring.width);
barcodeheight += (int)_sizebarcodestring.height + space_height;
}
//else
//{
// if (!string.isnullorempty(_additionalinfo))
// {
// _sizeadditionalinfo = g.measurestring(_additionalinfo, additionalinfofont);
// barcodewidth = math.max(barcodewidth, (int)_sizeadditionalinfo.width);
// barcodeheight += (int)_sizeadditionalinfo.height + space_height;
// }
//}
}
}
return new bitmap(barcodewidth, barcodeheight, pixelformat.format32bppargb);
}
}
/// <summary>
/// draw the barcode value to the blank back image and output it to the browser
/// 绘制webform形式的条码
/// </summary>
/// <param name="ms">recommand the "response.outputstream" 使用 response.outputstream</param>
/// <param name="imageformat">the image format to the browser 输出到浏览器到图片格式，建议gif</param>
public bitmap createwebform(stream ms, imageformat imageformat)
{
int barcodewidth, barcodeheight;
using (bitmap bmp = this.blankbackimage)
{
barcodeheight = bmp.height;
barcodewidth = bmp.width;
using (graphics g = graphics.fromimage(bmp))
{
g.clear(color.white);
g.textrenderinghint = system.drawing.text.textrenderinghint.cleartypegridfit;
g.smoothingmode = system.drawing.drawing2d.smoothingmode.highquality;
int vpos = 0;
////draw label string
if (!string.isnullorempty(_label))
{
g.drawstring(_label, labelfont, new solidbrush(color.black),
xcenter((int)_sizelabel.width, barcodewidth), vpos);
vpos += (int)_sizelabel.height + space_height;
}
else { vpos = space_height; }
////draw the bar value
g.drawstring(_barcodevalue, new font("free 3 of 9 extended", _barcodefontsize), new solidbrush(color.black),
xcenter((int)_sizebarcodevalue.width, barcodewidth), vpos);
////draw the barvalue string
if (_showbarcodevalue)
{
g.drawstring(_barcodevalue, barcodevaluefont, new solidbrush(color.black),
xcenter((int)_sizebarcodestring.width, barcodewidth),
vpos + (int)_sizebarcodevalue.height);
}
//else
//{
// if (!string.isnullorempty(_additionalinfo))
// {
// g.drawstring(_additionalinfo, additionalinfofont, new solidbrush(color.black),
// xcenter((int)_sizeadditionalinfo.width, barcodewidth),
// vpos + (int)_sizebarcodevalue.height);
// }
//}
}
bmp.save(ms, imageformat);
return bmp;
}
}
/// <summary>
/// 生成winform格式的条码
/// </summary>
/// <param name="imageformat">图片格式，建议gif</param>
/// <returns>stream类型</returns>
public stream createwinform(imageformat imageformat)
{
int barcodewidth, barcodeheight;
using (bitmap bmp = this.blankbackimage)
{
barcodeheight = bmp.height;
barcodewidth = bmp.width;
using (graphics g = graphics.fromimage(bmp))
{
g.clear(color.white);
g.textrenderinghint = system.drawing.text.textrenderinghint.cleartypegridfit;
g.smoothingmode = system.drawing.drawing2d.smoothingmode.highquality;
int vpos = 0;
////draw label string
if (!string.isnullorempty(_label))
{
g.drawstring(_label, labelfont, new solidbrush(color.black),
xcenter((int)_sizelabel.width, barcodewidth), vpos);
vpos += (int)_sizelabel.height + space_height;
}
else { vpos = space_height; }
////draw the bar value
g.drawstring(_barcodevalue, new font("free 3 of 9 extended", _barcodefontsize), new solidbrush(color.black),
xcenter((int)_sizebarcodevalue.width, barcodewidth), vpos);
////draw the barvalue string
if (_showbarcodevalue)
{
g.drawstring(_barcodevalue, barcodevaluefont, new solidbrush(color.black),
xcenter((int)_sizebarcodestring.width, barcodewidth),
vpos + (int)_sizebarcodevalue.height);
}
//else
//{
// //if (!string.isnullorempty(_additionalinfo))
// //{
// // g.drawstring(_additionalinfo, additionalinfofont, new solidbrush(color.black),
// // //xcenter((int)_sizeadditionalinfo.width, barcodewidth),
// // vpos + (int)_sizebarcodevalue.height);
// //}
//}
}
stream ms = new memorystream();
bmp.save(ms, imageformat);
return ms;
}
}
#endregion
private static int xcenter(int subwidth, int globalwidth)
{
return (globalwidth - subwidth) / 2;
}
}

3.如果是web程序 请调用 createwebform 如果是cs程序 则使用createwinform
4.新建一aspx文件，写入以下代码

protected void page_load(object sender, eventargs e)
{
code39 code39 = new code39();
code39.barcodevalue = "ldso-001";
code39.barcodefontszie = 60;
// code39.label = "39码，底部显示码值";
code39.showbarcodevalue = true;
response.write(code39.createwebform(response.outputstream, system.drawing.imaging.imageformat.gif));
code39 = null;
}