using System;
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using System.Drawing;
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using System.Drawing.Imaging;
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using System.IO;
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using ZXing;
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using ZXing.Common;
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using ZXing.OneD;
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using ZXing.QrCode;
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using ZXing.QrCode.Internal;
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namespace Utility.Tools
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{
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public class BarcodeHelper
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{
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static readonly string prefix = "data:image/png;base64,";
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public static Bitmap GetCodeBar(string txt, int width, int height, bool hideCode = false)
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{
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Code128EncodingOptions options = new Code128EncodingOptions()
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{
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Width = width,
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Height = height,
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Margin = 0,
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PureBarcode = hideCode,
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ForceCodesetB = true,
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GS1Format = false
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};
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BarcodeWriter writer = new BarcodeWriter
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{
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Format = BarcodeFormat.CODE_128,
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Options = options,
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};
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try
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{
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Bitmap map = writer.Write(txt);
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return map;
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}
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catch (Exception e)
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{
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var msg = e.Message;
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return null;
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}
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}
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/// <summary>
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/// 获取一维码的Base64内容【png格式】
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/// </summary>
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/// <param name="txt"></param>
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/// <param name="width"></param>
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/// <param name="height"></param>
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/// <param name="hideCode"></param>
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/// <returns></returns>
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public static string GetCodeBarBase64(string txt, int width, int height, bool hideCode = false)
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{
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Bitmap map = GetCodeBar(txt, width, height, hideCode);
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if (map == null)
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{
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return string.Empty;
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}
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MemoryStream stream = new MemoryStream();
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try
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{
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map.Save(stream, ImageFormat.Png);
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string re = $"{prefix}{Convert.ToBase64String(stream.ToArray())}";
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return re;
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}
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catch (Exception)
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{
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return string.Empty;
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}
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finally
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{
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map.Dispose();
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stream.Dispose();
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}
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}
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/// <summary>
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/// 获取二维码QR
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/// </summary>
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/// <param name="txt"></param>
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/// <param name="width"></param>
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/// <param name="height"></param>
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/// <returns></returns>
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public static Bitmap GetQrCode(string txt, int width, int height)
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{
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QrCodeEncodingOptions options = new QrCodeEncodingOptions()
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{
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DisableECI = true,//设置内容编码
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CharacterSet = "UTF-8", //设置二维码的宽度和高度
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Width = width,
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Height = height,
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ErrorCorrection = ErrorCorrectionLevel.H,
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Margin = 0//设置二维码的边距,单位不是固定像素
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};
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BarcodeWriter writer = new BarcodeWriter
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{
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Format = BarcodeFormat.QR_CODE,
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Options = options
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};
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try
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{
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Bitmap map = writer.Write(txt);
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return map;
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}
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catch (Exception)
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{
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return null;
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}
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}
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/// <summary>
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/// 获取二维码QR的Base64内容【png格式】
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/// </summary>
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/// <param name="txt"></param>
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/// <param name="width"></param>
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/// <param name="height"></param>
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/// <returns></returns>
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public static string GetQrCodeBase64(string txt, int width, int height)
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{
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Bitmap map = GetQrCode(txt, width, height);
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if (map == null)
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{
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return string.Empty;
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}
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MemoryStream stream = new MemoryStream();
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try
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{
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map.Save(stream, ImageFormat.Png);
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string re = $"{prefix}{Convert.ToBase64String(stream.ToArray())}";
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return re;
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}
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catch (Exception)
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{
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return string.Empty;
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}
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finally
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{
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map.Dispose();
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stream.Dispose();
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}
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}
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/// <summary>
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/// 获取识别一维码或二维码的结果
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/// </summary>
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/// <param name="base64"></param>
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/// <returns></returns>
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public static string GetDecode(string base64)
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{
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string re = string.Empty;
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var bts = Convert.FromBase64String(base64);
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MemoryStream stream = new MemoryStream(bts);
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var map = (Bitmap)Image.FromStream(stream);
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//
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var reader = new BarcodeReader();
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try
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{
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var result = reader.Decode(map);
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if (result != null)
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{
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re = $"{result.BarcodeFormat}:{result.Text}";
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}
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return re;
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}
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catch (Exception)
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{
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return re;
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}
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finally
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{
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stream.Dispose();
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map.Dispose();
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}
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}
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}
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}
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