publicsealedclass Code39
{
#region private variables
///<summary>
/// The Space Between each of Title, BarCode, BarCodeString
///</summary>
privateconstint SPACE_HEIGHT =3;
SizeF _sizeLabel = SizeF.Empty;
SizeF _sizeBarCodeValue = SizeF.Empty;
SizeF _sizeBarCodeString = SizeF.Empty;

#endregion

#region Label
privatestring _label =null;
private Font _labelFont =null;
///<summary>
/// BarCode Title (条码标签)
///</summary>
publicstring 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)
returnnew Font("Arial", 10);
return _labelFont;
}
set { _labelFont = value; }
}
#endregion

privatestring _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) returnnew 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>
publicstring AdditionalInfo
{
set { _additionalInfo = value; }
}

#region BarCode Value and Font
privatestring _barCodeValue =null;
///<summary>
/// BarCode Value (条码值)
///</summary>
publicstring BarCodeValue
{
get
{
if (string.IsNullOrEmpty(_barCodeValue))
thrownew NullReferenceException("The BarCodeValue has not been set yet!");
return _barCodeValue;
}
set { _barCodeValue = value.StartsWith("*") && value.EndsWith("*") ? value : "*"+ value +"*"; }
}

privatebool _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>
publicbool 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)
returnnew Font("Arial", 10);
return _barCodeValueFont;
}
set { _barCodeValueFont = value; }
}

privateint _barCodeFontSize =50;
///<summary>
/// the font size of the barcode value to draw
/// 条码绘制的大小，默认50
///</summary>
publicint 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;
// }
//}
}
}

returnnew 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

privatestaticint XCenter(int subWidth, int globalWidth)
{
return (globalWidth - subWidth) /2;
}

}