c#, barcode, ZXing.Net, code39, code128

gen_barcode.cs

///
/// 使用 ZXing.Net 產生barcode / CODE_39 / CODE_128。
/// ref → [ZXing.Net](https://github.com/micjahn/ZXing.Net)
/// ref → https://github.com/relyky/GenBarcode
///

using QRCoder;
using System;
using System.Drawing;
using System.IO;
using System.Linq;
using ZXing;

static class Utilities
{
	#region 商業邏輯層 / 產生QR Code / 產生時間戳章/印章

	/// <summary>
	/// 產生QRCode image blob
	/// </summary>
	public static byte[] MakeQRCodeBlob(string text)
	{
		// 產生QR Code
		using (Bitmap qrCodeImage = MakeQRCodeBitmap(text))
		using (var ms = new MemoryStream())
		{
			qrCodeImage.Save(ms, System.Drawing.Imaging.ImageFormat.Bmp); // 參數點之一
			byte[] imgBlob = ms.ToArray();
			return imgBlob;
		}
	}

	/// <summary>
	/// 產生QRCode image
	/// </summary>
	public static Bitmap MakeQRCodeBitmap(string text)
	{
		// 產生QR Code
		QRCodeGenerator qrGenerator = new QRCodeGenerator();
		QRCodeData qrCodeData = qrGenerator.CreateQrCode(text, QRCodeGenerator.ECCLevel.Q); // 參數點之一
		QRCode qrCode = new QRCode(qrCodeData);
		Bitmap qrCodeImage = qrCode.GetGraphic(3); // 每單位"點"的大小。還有顏色等參數。 // 參數點之一

		return qrCodeImage;
	}

	/// <summary>
	/// 產生時間戳章/印章 timestamp image blob
	/// </summary>
	public static byte[] MakeTimestampBlob(string emptyStampImagePath, string stampUnit, string stampDate, string stampStaff)
	{
		//# 載入空白的時戳圖檔
		Image stampImage = Image.FromFile(emptyStampImagePath);

		//# 再打印：單位、日期、人員等資訊 
		// draw string
		Graphics g = Graphics.FromImage(stampImage);

		// Create font and brush.
		Font drawFont = new Font("Arial", 8, FontStyle.Bold);
		SolidBrush drawBrush = new SolidBrush(Color.DarkBlue);

		//// Set format of string.
		//StringFormat drawFormat = new StringFormat();
		//drawFormat.FormatFlags = StringFormatFlags.DirectionVertical;

		// Draw string to screen.
		g.DrawString(stampUnit, drawFont, drawBrush, 47.0F, 45.0F);
		g.DrawString(stampDate, drawFont, drawBrush, 38.0F, 70.0F);
		g.DrawString(stampStaff, drawFont, drawBrush, 55.0F, 122.0F);

		// 轉成BLOB
		byte[] imgBlob = null;
		using (var ms = new MemoryStream())
		{
			stampImage.Save(ms, System.Drawing.Imaging.ImageFormat.Bmp); // 參數點之一
			imgBlob = ms.ToArray();
		}

		return imgBlob;
	}

	#endregion

	#region  產生 Code39 / Code128

	public static Bitmap MakeCode128Bitmap(string asciiString, int height = 50, bool pureBarcode = false, int margin = 20)
	{
		ZXing.BarcodeWriter writer = new ZXing.BarcodeWriter();
		writer.Format = ZXing.BarcodeFormat.CODE_128;
		writer.Options.Height = height;
		writer.Options.Margin = margin;
		writer.Options.PureBarcode = pureBarcode;

		// 填入Options，當有設定的話。
		Bitmap bmp = writer.Write(asciiString);
		return bmp;
	}

	public static byte[] MakeCode128Blob(string asciiString, int height = 50, bool pureBarcode = false, int margin = 20)
	{
		using (Bitmap bmp = MakeCode128Bitmap(asciiString, height, pureBarcode, margin))
		using (var ms = new MemoryStream())
		{
			bmp.Save(ms, System.Drawing.Imaging.ImageFormat.Bmp);
			byte[] imgBlob = ms.ToArray();
			return imgBlob;
		}
	}

	public static Bitmap MakeCode39Bitmap(string asciiString, int height = 50, bool pureBarcode = false, int margin = 20)
	{
		ZXing.BarcodeWriter writer = new ZXing.BarcodeWriter();
		writer.Format = ZXing.BarcodeFormat.CODE_39;
		writer.Options.Height = height;
		writer.Options.Margin = margin;
		writer.Options.PureBarcode = pureBarcode;

		// 填入Options，當有設定的話。
		Bitmap bmp = writer.Write(asciiString);
		return bmp;
	}

	public static byte[] MakeCode39Blob(string asciiString, int height = 50, bool pureBarcode = false, int margin = 20)
	{
		using (Bitmap bmp = MakeCode39Bitmap(asciiString, height, pureBarcode, margin))
		using (var ms = new MemoryStream())
		{
			bmp.Save(ms, System.Drawing.Imaging.ImageFormat.Bmp);
			byte[] imgBlob = ms.ToArray();
			return imgBlob;
		}
	}

	/// <summary>
	/// Bitmap to Byte array 
	/// </summary>
	public static byte[] Bitmap2Blob(Bitmap bmp)
	{
		using (MemoryStream ms = new MemoryStream())
		{
			bmp.Save(ms, System.Drawing.Imaging.ImageFormat.Bmp);
			byte[] blob = ms.ToArray();
			return blob;
		}
	}

	/// <summary>
	/// Byte array to Bitmap
	/// </summary>
	public static Bitmap Blob2Bitmap(byte[] blob)
	{
		using (MemoryStream ms = new MemoryStream(blob))
		{
			Bitmap bmp = (Bitmap)Bitmap.FromStream(ms);
			return bmp;
		}
	}

	#endregion

}