68 lines
2.1 KiB
C#
68 lines
2.1 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Drawing;
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using System.Linq;
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using System.Web;
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using ThoughtWorks.QRCode.Codec;
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using ThoughtWorks.QRCode.Codec.Data;
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namespace VRS.Util
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{
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/// <summary>
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/// 二维码工具
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/// </summary>
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public static class QRCodeHelper
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{
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/// <summary>
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/// 读取图片文件，识别二维码
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/// </summary>
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/// <param name="filePath">图片文件路劲</param>
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/// <returns>识别结果字符串</returns>
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public static string CodeDecoder(string filePath)
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{
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string decoderStr;
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bool isGreen = false;
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try
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{
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if (!System.IO.File.Exists(filePath))//判断有没有需要读取的主文件夹，如果不存在，终止
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return null;
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Bitmap bitMap = new Bitmap(Image.FromFile(filePath));//实例化位图对象，把文件实例化为带有颜色信息的位图对象
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for (int i = bitMap.Height / 3, h = bitMap.Height; i < h; i++)
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{
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for (int j = 0, w = bitMap.Width; j < w; j++)
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{
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var color = bitMap.GetPixel(j, i);
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if (IsGreen(color))
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{
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isGreen = true;
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break;
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}
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}
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if (isGreen)
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break;
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}
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QRCodeDecoder decoder = new QRCodeDecoder();//实例化QRCodeDecoder
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//通过.decoder方法把颜色信息转换成字符串信息
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decoderStr = decoder.decode(new QRCodeBitmapImage(bitMap), System.Text.Encoding.UTF8);
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}
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catch (Exception ex)
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{
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return ex.Message;
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}
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if (!isGreen)
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return "warning";
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else
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return decoderStr;//返回字符串信息
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}
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public static bool IsGreen(Color color)
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{
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return (color.G > color.R * 5) && (color.G > color.B * 5);
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}
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}
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} |