史上最简洁C# 生成条形码图片思路及示例分享
在网上看到一些人写关于条形码的代码都很长，有的甚至拿来卖，所以查了下资料，希望能对大家有帮助。
我的实现原理是：
其实Windows本身就有一个字体是用来显示条形码的。
只要将数字改为这种字体就变成了条形码。
windows字体库下，有如下八种字体可以用来将数字转换成条形码：
Code39AzaleaNarrow1 Code39AzaleaNarrow2 Code39AzaleaNarrow3 Code39AzaleaRegular1 Code39AzaleaRegular2 Code39AzaleaWide1 Code39AzaleaWide2 Code39AzaleaWide3
把代码贴给大家参考：
Bitmapb=newBitmap(200,200);
Graphicsg=Graphics.FromImage(b);
Fontfont=newFont("Code39AzaleaRegular2",32);
g.DrawString("123456",font,Brushes.Black,newPointF(100,100));
pictureBox1.BackgroundImage=b;
pictureBox1.BackgroundImageLayout=ImageLayout.Zoom。
是不是很简单呢，亲们，思路给大家了，具体使用到项目中的时候，小伙伴们自己扩展下就可以了。
另附上一则示例中的应用
usingSystem;
usingSystem.Collections.Generic;
usingSystem.Web;
usingSystem.Drawing;
usingSystem.Drawing.Imaging;
usingSystem.Drawing.Drawing2D;
usingSystem.Drawing.Text;
usingSystem.Drawing.Design;
usingSystem.IO;
usingSystem.Collections;
namespacePublic.Equipment
{
///<summary>
///绘制条形码
///</summary>
publicclassDrawingBarCode
{
publicDrawingBarCode()
{
//
//TODO:在此处添加构造函数逻辑
//
}
#region根据字体产生条形码
///<summary>
///根据条形码绘制图片
///</summary>
///<paramname="strNumber">条形码</param>
publicvoidDrawingBarCode(stringstrNumber)
{
PrivateFontCollectionfonts=newPrivateFontCollection();
//39带数字
//fonts.AddFontFile(HttpContext.Current.Server.MapPath(".")+"/BarCodeFonts/V100010_.TTF");
//FontFamilyff=newFontFamily("C39HrP48DlTt",fonts);
//39码
strNumber="*"+strNumber+"*";
fonts.AddFontFile(HttpContext.Current.Server.MapPath(".")+"/BarCodeFonts/FREE3OF9X.TTF");
FontFamilyff=newFontFamily("Free3of9Extended",fonts);
//接近条形码
//fonts.AddFontFile(HttpContext.Current.Server.MapPath(".")+"/BarCodeFonts/V100014_.TTF");
//FontFamilyff=newFontFamily("C39P24DlTt",fonts);
Fontfont=newFont(ff,12);
//设置图片大小
Imageimg=newBitmap(1,1);
Graphicsg=Graphics.FromImage(img);
SizeFfontSize=g.MeasureString(strNumber,font);
intintWidth=Convert.ToInt32(fontSize.Width);
intintHeight=Convert.ToInt32(fontSize.Height);
g.Dispose();
img.Dispose();
img=newBitmap(intWidth,intHeight);
g=Graphics.FromImage(img);
g.Clear(Color.White);
g.CompositingQuality=CompositingQuality.HighQuality;
g.SmoothingMode=SmoothingMode.HighQuality;
g.DrawString(strNumber,font,Brushes.Black,0,0);
MemoryStreamstream=newMemoryStream();
img.Save(stream,ImageFormat.Jpeg);
HttpContext.Current.Response.ClearContent();
HttpContext.Current.Response.ContentType="image/Jpeg";
HttpContext.Current.Response.BinaryWrite(stream.ToArray());
g.Dispose();
img.Dispose();
}
///<summary>
///根据条形码绘制图片
///</summary>
///<paramname="strNumber">条形码</param>
///<paramname="intFontSize">字体大小</param>
publicvoidDrawingBarCode(stringstrNumber,intintFontSize)
{
PrivateFontCollectionfonts=newPrivateFontCollection();
//39带数字
//fonts.AddFontFile(HttpContext.Current.Server.MapPath(".")+"/BarCodeFonts/V100010_.TTF");
//FontFamilyff=newFontFamily("C39HrP48DlTt",fonts);
//39码
strNumber="*"+strNumber+"*";
fonts.AddFontFile(HttpContext.Current.Server.MapPath(".")+"/BarCodeFonts/FREE3OF9X.TTF");
FontFamilyff=newFontFamily("Free3of9Extended",fonts);
//接近条形码
//fonts.AddFontFile(HttpContext.Current.Server.MapPath(".")+"/BarCodeFonts/V100014_.TTF");
//FontFamilyff=newFontFamily("C39P24DlTt",fonts);
Fontfont=newFont(ff,intFontSize);
//设置图片大小
Imageimg=newBitmap(1,1);
Graphicsg=Graphics.FromImage(img);
SizeFfontSize=g.MeasureString(strNumber,font);
intintWidth=Convert.ToInt32(fontSize.Width);
intintHeight=Convert.ToInt32(fontSize.Height);
g.Dispose();
img.Dispose();
img=newBitmap(intWidth,intHeight);
g=Graphics.FromImage(img);
g.Clear(Color.White);
g.CompositingQuality=CompositingQuality.HighQuality;
g.SmoothingMode=SmoothingMode.HighQuality;
g.DrawString(strNumber,font,Brushes.Black,0,0);
MemoryStreamstream=newMemoryStream();
img.Save(stream,ImageFormat.Jpeg);
HttpContext.Current.Response.ClearContent();
HttpContext.Current.Response.ContentType="image/Jpeg";
HttpContext.Current.Response.BinaryWrite(stream.ToArray());
g.Dispose();
img.Dispose();
}
#endregion
#region绘制Code39码
///<summary>
///根据条形码绘制图片
///</summary>
///<paramname="strNumber">条形码</param>
publicvoidDrawingBarCode39(stringstrNumber,intintFontSize,boolWithStart)
{
ViewFont=newFont("宋体",intFontSize);
Imageimg=GetCodeImage(strNumber,Code39Model.Code39Normal,WithStart);
MemoryStreamstream=newMemoryStream();
img.Save(stream,ImageFormat.Jpeg);
HttpContext.Current.Response.Clear();
HttpContext.Current.Response.ClearContent();
HttpContext.Current.Response.BufferOutput=true;
HttpContext.Current.Response.ContentType="image/Jpeg";
HttpContext.Current.Response.BinaryWrite(stream.GetBuffer());
HttpContext.Current.Response.Flush();
}
privateHashtablem_Code39=newHashtable();
privatebytem_Magnify=0;
///<summary>
///放大倍数
///</summary>
publicbyteMagnify{get{returnm_Magnify;}set{m_Magnify=value;}}
privateintm_Height=40;
///<summary>
///图形高
///</summary>
publicintHeight{get{returnm_Height;}set{m_Height=value;}}
privateFontm_ViewFont=null;
///<summary>
///字体大小
///</summary>
publicFontViewFont{get{returnm_ViewFont;}set{m_ViewFont=value;}}
/**
Code39码的编码规则是：
1、每五条线表示一个字符；
2、粗线表示1，细线表示0；
3、线条间的间隙宽的表示1，窄的表示0；
4、五条线加上它们之间的四条间隙就是九位二进制编码，而且这九位中必定有三位是1，所以称为39码；
5、条形码的首尾各一个＊标识开始和结束
*/
publicDrawingBarCode(BooleanIsCode39)
{
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");
}
publicenumCode39Model
{
///<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>
///<paramname="p_Text">文字信息</param>
///<paramname="p_Model">类别</param>
///<paramname="p_StarChar">是否增加前后*号</param>
///<returns>图形</returns>
publicBitmapGetCodeImage(stringp_Text,Code39Modelp_Model,boolp_StarChar)
{
string_ValueText="";
string_CodeText="";
char[]_ValueChar=null;
switch(p_Model)
{
caseCode39Model.Code39Normal:
_ValueText=p_Text.ToUpper();
break;
default:
_ValueChar=p_Text.ToCharArray();
for(inti=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(inti=0;i!=_ValueChar.Length;i++)
{
if(p_StarChar==true&&_ValueChar[i]=='*')thrownewException("带有起始符号不能出现*");
object_CharCode=m_Code39[_ValueChar[i].ToString()];
if(_CharCode==null)thrownewException("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>
///<paramname="p_Text">编码</param>
///<returns>图形</returns>
privateBitmapGetImage(stringp_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=newBitmap(_Value.Length*((int)m_Magnify+1),(int)m_Height);
Graphics_Garphics=Graphics.FromImage(_CodeImage);
_Garphics.FillRectangle(Brushes.White,newRectangle(0,0,_CodeImage.Width,_CodeImage.Height));
int_LenEx=0;
for(inti=0;i!=_Value.Length;i++)
{
int_DrawWidth=m_Magnify+1;
if(_Value[i]=='1')
{
_Garphics.FillRectangle(Brushes.Black,newRectangle(_LenEx,0,_DrawWidth,m_Height));
}
else
{
_Garphics.FillRectangle(Brushes.White,newRectangle(_LenEx,0,_DrawWidth,m_Height));
}
_LenEx+=_DrawWidth;
}
_Garphics.Dispose();
return_CodeImage;
}
///<summary>
///绘制文字,文字宽度大于图片宽度将不显示
///</summary>
///<paramname="p_CodeImage">图形</param>
///<paramname="p_Text">文字</param>
privatevoidGetViewImage(Bitmapp_CodeImage,stringp_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,newRectangle(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();
}
#endregion
}
}