C# asp.net 条形码 code39条码 生成 扫描枪能识别
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 点击这里也可下载
2.建个类 为 code39 并写入以下代码
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
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
;
}