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Copy pathQrCodeHelper.cs
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287 lines (242 loc) · 9.93 KB
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/*
* 作用：通过 ZXing.Net 实现二维码/条形码创建/识别，支持生成不带空白边框的二维码。
* ZXing 下载地址：http://zxingnet.codeplex.com/
* */
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
using System.IO;
using ZXing;
using ZXing.Common;
using ZXing.QrCode;
using ZXing.QrCode.Internal;
namespace Helper.Core.Library
{
#region 逻辑处理辅助枚举
internal class QrcodeImageFormat
{
public const string Png = ".png";
public const string Jpg = ".jpg";
private static List<string> formatList;
public static List<string> FormatList
{
get
{
if (formatList == null || formatList.Count == 0)
{
formatList = new List<string>()
{
Png,
Jpg
};
}
return formatList;
}
}
}
#endregion
public class QrCodeHelper
{
#region 私有属性常量
private const string QrcodeWidthOrHeightException = "图片宽/高不能为零！";
private const string QrcodeImageFormatErrorException = "二维码图片后缀不正确！";
#endregion
#region 对外公开方法
/// <summary>
/// 生成二维码
/// </summary>
/// <param name="data">数据</param>
/// <param name="path">二维码地址</param>
/// <param name="width">宽</param>
/// <param name="height">高</param>
/// <param name="logoPath">标志地址，默认为空</param>
/// <param name="margin">边距</param>
/// <param name="characterSet">编码格式，默认为 UTF8</param>
/// <returns></returns>
public static bool Qrcode(string data, string path, int width, int height, string logoPath = "", int margin = 5, string characterSet = "UTF-8")
{
if (width == 0 || height == 0) throw new Exception(QrcodeWidthOrHeightException);
Bitmap bitmap = null;
Bitmap reviseBitmap = null;
Bitmap newBitmap = null;
Image logoImage = null;
Graphics graphic = null;
try
{
#region 生成二维码
string suffix = FileHelper.GetSuffix(path);
if (QrcodeImageFormat.FormatList.IndexOf(suffix) < 0) throw new Exception(QrcodeImageFormatErrorException);
ImageFormat imageFormat = ImageFormat.Png;
if (suffix == QrcodeImageFormat.Jpg) imageFormat = ImageFormat.Jpeg;
bool directoryResult = FileHelper.CreateDirectory(path);
if (!directoryResult) return false;
if (File.Exists(path)) File.Delete(path);
QrCodeEncodingOptions options = new QrCodeEncodingOptions()
{
DisableECI = true, CharacterSet = characterSet, Width = width, Height = height, Margin = margin, ErrorCorrection = ErrorCorrectionLevel.H
};
BarcodeWriter barcodeWriter = new BarcodeWriter()
{
Format = BarcodeFormat.QR_CODE, Options = options
};
bitmap = barcodeWriter.Write(data);
#endregion
#region 修正二维码边框
reviseBitmap = ReviseBitmap(bitmap);
bitmap.Dispose();
newBitmap = new Bitmap(width, height);
graphic = Graphics.FromImage(newBitmap);
graphic.FillRectangle(Brushes.White, 0, 0, newBitmap.Width, newBitmap.Height);
graphic.CompositingQuality = CompositingQuality.HighQuality;
graphic.SmoothingMode = SmoothingMode.HighQuality;
graphic.InterpolationMode = InterpolationMode.HighQualityBicubic;
graphic.DrawImage(reviseBitmap, margin, margin, newBitmap.Width - margin * 2, newBitmap.Height - margin * 2);
#endregion
#region 添加 LOGO 图标
if (!string.IsNullOrEmpty(logoPath))
{
logoImage = new Bitmap(logoPath);
int offsetX = (int)((newBitmap.Width - logoImage.Width) * 0.5);
int offsetY = (int)((newBitmap.Height - logoImage.Height) * 0.5);
graphic.DrawImage(logoImage, offsetX, offsetY, logoImage.Width, logoImage.Height);
}
#endregion
newBitmap.Save(path, imageFormat);
return true;
}
catch
{
throw;
}
finally
{
if (graphic != null) graphic.Dispose();
if (logoImage != null) logoImage.Dispose();
if (bitmap != null) bitmap.Dispose();
if (reviseBitmap != null) reviseBitmap.Dispose();
if (newBitmap != null) newBitmap.Dispose();
}
}
/// <summary>
/// 生成条形码，128 码
/// </summary>
/// <param name="data">数据</param>
/// <param name="path">条形码存储地址</param>
/// <param name="width">宽</param>
/// <param name="height">高</param>
/// <param name="margin">边距</param>
/// <returns></returns>
public static bool Gecode(string data, string path, int width, int height, int margin = 5)
{
if (width == 0 || height == 0) throw new Exception(QrcodeWidthOrHeightException);
Bitmap bitmap = null;
Bitmap reviseBitmap = null;
Bitmap newBitmap = null;
Graphics graphic = null;
try
{
string suffix = FileHelper.GetSuffix(path);
if (QrcodeImageFormat.FormatList.IndexOf(suffix) < 0) throw new Exception(QrcodeImageFormatErrorException);
ImageFormat imageFormat = ImageFormat.Png;
if (suffix == QrcodeImageFormat.Jpg) imageFormat = ImageFormat.Jpeg;
bool directoryResult = FileHelper.CreateDirectory(path);
if (!directoryResult) return false;
if (File.Exists(path)) File.Delete(path);
EncodingOptions options = new EncodingOptions()
{
Width = width, Height = height, Margin = margin
};
BarcodeWriter barcodeWriter = new BarcodeWriter()
{
Format = BarcodeFormat.CODE_128, Options = options
};
bitmap = barcodeWriter.Write(data);
reviseBitmap = ReviseBitmap(bitmap);
bitmap.Dispose();
newBitmap = new Bitmap(width, height);
graphic = Graphics.FromImage(newBitmap);
graphic.FillRectangle(Brushes.White, 0, 0, newBitmap.Width, newBitmap.Height);
graphic.CompositingQuality = CompositingQuality.HighQuality;
graphic.SmoothingMode = SmoothingMode.HighQuality;
graphic.InterpolationMode = InterpolationMode.HighQualityBicubic;
graphic.DrawImage(reviseBitmap, margin, margin, newBitmap.Width - margin * 2, newBitmap.Height - margin * 2);
newBitmap.Save(path, imageFormat);
return true;
}
catch
{
throw;
}
finally
{
if (graphic != null) graphic.Dispose();
if (bitmap != null) bitmap.Dispose();
if (reviseBitmap != null) reviseBitmap.Dispose();
if (newBitmap != null) newBitmap.Dispose();
}
}
/// <summary>
/// 识别二维码/条形码
/// </summary>
/// <param name="path">文件地址</param>
/// <param name="characterSet">编码格式，默认为 UTF8</param>
/// <returns></returns>
public static string Extract(string path, string characterSet = "UTF-8")
{
Bitmap bitmap = null;
try
{
BarcodeReader barcodeReader = new BarcodeReader();
barcodeReader.Options.CharacterSet = characterSet;
bitmap = new Bitmap(path);
Result result = barcodeReader.Decode(bitmap);
bitmap.Dispose();
return result == null ? "" : result.Text;
}
catch
{
throw;
}
finally
{
if (bitmap != null) bitmap.Dispose();
}
}
#endregion
#region 逻辑处理私有函数
private static Bitmap ReviseBitmap(Bitmap bitmap)
{
Point borderPoint = BorderCheck(bitmap);
Bitmap newBitmap = new Bitmap(bitmap.Width - borderPoint.X * 2, bitmap.Height - borderPoint.Y * 2);
int width = newBitmap.Width;
int height = newBitmap.Height;
for (int posX = 0; posX < width; posX++)
{
for (int posY = 0; posY < height; posY++)
{
newBitmap.SetPixel(posX, posY, bitmap.GetPixel(posX + borderPoint.X, posY + borderPoint.Y));
}
}
return newBitmap;
}
private static Point BorderCheck(Bitmap bitmap)
{
int width = bitmap.Width;
int height = bitmap.Height;
for (int posX = 0; posX < width; posX++)
{
for (int posY = 0; posY < height; posY++)
{
if (bitmap.GetPixel(posX, posY).Name == "ff000000")
{
return new Point(posX, posY);
}
}
}
return new Point();
}
#endregion
}
}