public void DrawImage(ref Bitmap bm, string code)
{
#if NETSTANDARD2_0
var writer = new ZXing.BarcodeWriter <Bitmap>();
#else
var writer = new ZXing.BarcodeWriter();
#endif
if (code.Length == 13)
{
writer.Format = ZXing.BarcodeFormat.EAN_13;
}
else if (code.Length == 8)
{
writer.Format = ZXing.BarcodeFormat.EAN_8;
}
else
{
writer.Format = ZXing.BarcodeFormat.CODE_128;
}
Graphics g = null;
g = Graphics.FromImage(bm);
float mag = PixelConversions.GetMagnification(g, bm.Width, bm.Height,
OptimalHeight, OptimalWidth);
int barHeight = PixelConversions.PixelXFromMm(g, OptimalHeight * mag);
int barWidth = PixelConversions.PixelYFromMm(g, OptimalWidth * mag);
writer.Options.Height = barHeight;
writer.Options.Width = barWidth;
writer.Options.PureBarcode = true;
bm = writer.Write(code);
}
private static void _encode(string content, string filePath, EncodingOptions options)
{
var writer = new ZXing.BarcodeWriter <Bitmap>();
writer.Format = BarcodeFormat.CODE_128;
writer.Options = options;
writer.Renderer = new BitmapRenderer();
var bitmap = writer.Write(content);
bitmap.Save(filePath, ImageFormat.Png);
}
/// <summary>
/// 生成条形码
/// </summary>
/// <param name="content">编码的内容字符串</param>
/// <param name="filePath">生成的图片保存路径</param>
/// <param name="height">生成图片的高度</param>
/// <param name="width">生成图片的宽度</param>
public static void Encode(string content, string filePath, int height, int?width = null)
{
EncodingOptions options = null;
ZXing.BarcodeWriter <Bitmap> writer = null;
options = new EncodingOptions
{
Height = height,
PureBarcode = true
};
if (width != null)
{
options.Width = (int)width;
}
writer = new ZXing.BarcodeWriter <Bitmap>();
writer.Format = BarcodeFormat.CODE_128;
writer.Options = options;
Bitmap bitmap = writer.Write(content);
bitmap.Save(filePath, ImageFormat.Png);
}
