C# asp.net 条形码 code39条码 生成 扫描枪能识别(好东西...)

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 ;
}

 

 

顺便把源代码也给奉上吧

	作者：chenhuzi   出处：http://www.cnblogs.com/chenhuzi
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