.NET 绘制 EAN13 （商品条码）

最新推荐文章于 2021-03-17 18:29:52 发布

最新推荐文章于 2021-03-17 18:29:52 发布 · 216 阅读

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本文介绍了一个用于生成EAN13标准条形码的C#类。该类能够根据输入的13位数字创建对应的条形码图片，并提供调整条形码高度、字体大小等功能。

EAN商品条码的类

这个使用的比较多

其实前面的编码是根据前面的6来判断的。是类型A还是类型B

效果

使用方法

//获取验证位 


char
_ISBN=MyImage.BandCode.EAN13.EAN13ISBN(
"690102803695"
);

MessageBox.Show(_ISBN.ToString());

MyImage.BandCode.EAN13_EAN13Code=
new
MyImage.BandCode.EAN13();

_EAN13Code.Magnify=1;

_EAN13Code.Heigth=100;

_EAN13Code.FontSize=16;

pictureBox1.Image=_EAN13Code.GetCodeImage(
"6901028036955"
);

pictureBox1.Image.Save(@
"C:/1.bmp"
);

具体绘制类

using
System;

using
System.Collections;

using
System.ComponentModel;

using
System.Drawing;

using
System.Data;

namespace
MyImage.BandCode

{


public

class
EAN13

{


private
DataTablem_EAN13=
new
DataTable();


public
EAN13()

{

m_EAN13.Columns.Add(
"ID"
);

m_EAN13.Columns.Add(
"Type"
);

m_EAN13.Columns.Add(
"A"
);

m_EAN13.Columns.Add(
"B"
);

m_EAN13.Columns.Add(
"C"
);

m_EAN13.Rows.Add(
"0"
,
"AAAAAA"
,
"0001101"
,
"0100111"
,
"1110010"
);

m_EAN13.Rows.Add(
"1"
,
"AABABB"
,
"0011001"
,
"0110011"
,
"1100110"
);

m_EAN13.Rows.Add(
"2"
,
"AABBAB"
,
"0010011"
,
"0011011"
,
"1101100"
);

m_EAN13.Rows.Add(
"3"
,
"AABBBA"
,
"0111101"
,
"0100001"
,
"1000010"
);

m_EAN13.Rows.Add(
"4"
,
"ABAABB"
,
"0100011"
,
"0011101"
,
"1011100"
);

m_EAN13.Rows.Add(
"5"
,
"ABBAAB"
,
"0110001"
,
"0111001"
,
"1001110"
);

m_EAN13.Rows.Add(
"6"
,
"ABBBAA"
,
"0101111"
,
"0000101"
,
"1010000"
);

m_EAN13.Rows.Add(
"7"
,
"ABABAB"
,
"0111011"
,
"0010001"
,
"1000100"
);

m_EAN13.Rows.Add(
"8"
,
"ABABBA"
,
"0110111"
,
"0001001"
,
"1001000"
);

m_EAN13.Rows.Add(
"9"
,
"ABBABA"
,
"0001011"
,
"0010111"
,
"1110100"
);

}


private

uint
m_Height=40;


///<summary> 


///绘制高 


///</summary> 


public

uint
Heigth{
get
{
return
m_Height;}
set
{m_Height=value;}}


private

byte
m_FontSize=0;


///<summary> 


///字体大小（宋体） 


///</summary> 


public

byte
FontSize{
get
{
return
m_FontSize;}
set
{m_FontSize=value;}}




private

byte
m_Magnify=0;


///<summary> 


///放大系数 


///</summary> 


public

byte
Magnify{
get
{
return
m_Magnify;}
set
{m_Magnify=value;}}


public
BitmapGetCodeImage(
string
p_Text)

{


if
(p_Text.Length!=13)
throw

new
Exception(
"数字不是13位!"
);


string
_CodeText=p_Text.Remove(0,1);


string
_CodeIndex=
"101"
;


char
[]_LeftType=GetValue(p_Text.Substring(0,1),
"Type"
).ToCharArray();


for
(
int
i=0;i!=6;i++)

{

_CodeIndex+=GetValue(_CodeText.Substring(0,1),_LeftType[i].ToString());

_CodeText=_CodeText.Remove(0,1);

}



_CodeIndex+=
"01010"
;




for
(
int
i=0;i!=6;i++)

{

_CodeIndex+=GetValue(_CodeText.Substring(0,1),
"C"
);

_CodeText=_CodeText.Remove(0,1);

}

_CodeIndex+=
"101"
;


return
GetImage(_CodeIndex,p_Text);

}


///<summary> 


///获取目标对应的数据 


///</summary> 


///<paramname="p_Code">编码</param> 


///<paramname="p_Value">类型</param> 


///<returns>编码</returns> 


private

string
GetValue(
string
p_Value,
string
p_Type)

{


if
(m_EAN13==
null
)
return

""
;

DataRow[]_Row=m_EAN13.Select(
"ID='"
+p_Value+
"'"
);


if
(_Row.Length!=1)
throw

new
Exception(
"错误的编码"
+p_Value.ToString());


return
_Row[0][p_Type].ToString();

}


///<summary> 


///绘制编码图形 


///</summary> 


///<paramname="p_Text">编码</param> 


///<returns>图形</returns> 


private
BitmapGetImage(
string
p_Text,
string
p_ViewText)

{


char
[]_Value=p_Text.ToCharArray();


int
_FontWidth=0;

Font_MyFont=
null
;


if
(m_FontSize!=0)

{ 

#region获取符合大小的字体 

_MyFont=
new
Font(
"宋体"
,m_FontSize);

Bitmap_MyFontBmp=
new
Bitmap(m_FontSize,m_FontSize);

Graphics_FontGraphics=Graphics.FromImage(_MyFontBmp);




for
(
byte
i=m_FontSize;i!=0;i--)

{

SizeF_DrawSize=_FontGraphics.MeasureString(p_ViewText.Substring(0,1),_MyFont);


if
(_DrawSize.Height>m_FontSize)

{

_MyFont=
new
Font(
"宋体"
,i);

}


else

{

_FontWidth=(
int
)_DrawSize.Width;


break
;

}

} 

#endregion 

}


if
(ScanDrawText(_MyFont,p_Text,_FontWidth)==
false
)

{

_FontWidth=0;

m_FontSize=0;

}


//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)+(_FontWidth*2),(
int
)m_Height);

Graphics_Garphics=Graphics.FromImage(_CodeImage);

_Garphics.FillRectangle(Brushes.White,
new
Rectangle(0,0,_CodeImage.Width,_CodeImage.Height));




int
_Height=0;


int
_LenEx=_FontWidth;


for
(
int
i=0;i!=_Value.Length;i++)

{


int
_DrawWidth=m_Magnify+1;


if
(i==0||i==2||i==46||i==48||i==92||i==94)

{

_Height=(
int
)m_Height;

}


else

{

_Height=(
int
)m_Height-m_FontSize;

}


if
(_Value[i]==
'1'
)

{

_Garphics.FillRectangle(Brushes.Black,
new
Rectangle(_LenEx,0,_DrawWidth,_Height));



}


else

{

_Garphics.FillRectangle(Brushes.White,
new
Rectangle(_LenEx,0,_DrawWidth,_Height));

}

_LenEx+=_DrawWidth;

}


//绘制文字 


if
(_FontWidth!=0&&m_FontSize!=0)

{


int
_StarX=0;


int
_StarY=(
int
)m_Height-_MyFont.Height;

_Garphics.DrawString(p_ViewText.Substring(0,1),_MyFont,Brushes.Black,0,_StarY);

_StarX=_FontWidth+(3*(m_Magnify+1));

_Garphics.DrawString(p_ViewText.Substring(1,6),_MyFont,Brushes.Black,_StarX,_StarY);

_StarX=_FontWidth+(50*(m_Magnify+1));

_Garphics.DrawString(p_ViewText.Substring(7,6),_MyFont,Brushes.Black,_StarX,_StarY);

}

_Garphics.Dispose();


return
_CodeImage;

}


///<summary> 


///判断字体是否大与绘制图形 


///</summary> 


///<paramname="_MyFont">字体</param> 


///<paramname="p_Text">文字</param> 


///<paramname="p_Width">字体的宽</param> 


///<returns>true可以绘制False不可以绘制</returns> 


private

bool
ScanDrawText(Font_MyFont,
string
p_Text,
int
p_Width)

{


if
(_MyFont==
null
)
return

false
;


int
_Width=(p_Text.Length-6-5)*((
int
)m_Magnify+1);


if
((p_Width*12)>_Width)
return

false
;


return

true
;

}


///<summary> 


///获得条码的最后一位（验证位） 


///</summary> 


///<paramname="ANumbers">条码</param> 


///<returns></returns> 


public

static

char
EAN13ISBN(
string
_Numb)

{


int
_Sum=0;


int
_i=1;
//权值 


foreach
(
char
_Char
in
_Numb)

{


if
(
"0123456789"
.IndexOf(_Char)<0)
continue
;
//非数字 

_Sum+=(_Char-
'0'
)*_i;

_i=_i==1?3:1;

}


return

"01234567890"
[10-_Sum%10];

}



}

}