using ZXing;
using ZXing.Common;
using ZXing.QrCode;
using ZXing.QrCode.Internal;

/// <summary>
/// 生成條形碼
/// </summary>
/// <param name="text"></param>
static void GenerateBarCode(string text)
{ 
    BarcodeWriter writer = new BarcodeWriter();
    writer.Format = BarcodeFormat.CODE_128;
    EncodingOptions options = new EncodingOptions()
    {
        Width = 150,
        Height = 50,
        Margin = 2,
    };

    writer.Options = options;
    Bitmap map = writer.Write(text);
    string filename = @"D:\2.png";
    map.Save(filename, ImageFormat.Png);
    map.Dispose();
}

 /// <summary>
 /// 生成二維碼
 /// </summary>
 /// <param name="text"></param>
 static void GenerateQRCode(string text)
 {
     BarcodeWriter writer = new BarcodeWriter();
     writer.Format = BarcodeFormat.QR_CODE;
     QrCodeEncodingOptions options = new QrCodeEncodingOptions();
     options.DisableECI = true;
     // 設置內(nèi)容字符編碼
     options.CharacterSet = "UTF-8";
     // 設置二維碼的寬度高度
     options.Width = 200;
     options.Height = 200;
     // 設置二維碼的邊距，單位不是固定像素
     options.Margin = 1;
     writer.Options = options;

     Bitmap map = writer.Write(text);
     string filename = @"D:\1.png";
     map.Save(filename, ImageFormat.Png);
     map.Dispose();

 }

/// <summary>
/// 生成帶Logo圖片的二維碼
/// </summary>
/// <param name="text"></param>
static void GenerateQRCodeWithLoge(string text) 
{
    // Logo 圖片
    Bitmap logo = new Bitmap(@"D:\logo.png");
    // 構造二維碼寫碼器
    MultiFormatWriter writer = new MultiFormatWriter();
    Dictionary<EncodeHintType, object> hint = new Dictionary<EncodeHintType, object>();
    hint.Add(EncodeHintType.CHARACTER_SET, "UTF-8");
    hint.Add(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);

    // 生成二維碼
    BitMatrix bm = writer.encode(text, BarcodeFormat.QR_CODE, 300, 300, hint);
    BarcodeWriter barcodeWriter = new BarcodeWriter();
    Bitmap map = barcodeWriter.Write(bm);

    // 獲取二維碼實際尺寸（去掉二維碼兩邊空白后的實際尺寸）
    int[] rectangle = bm.getEnclosingRectangle();

    // 計算插入logo圖片的大小位置
    int middleW = Math.Min((int)(rectangle[2] / 3.5), logo.Width);
    int middleH = Math.Min((int)(rectangle[3] / 3.5), logo.Height);
    int middleL = (map.Width - middleW) / 2;
    int middleT = (map.Width - middleH) / 2;

    // 將img轉換成bmp格式，否則后面無法創(chuàng)建Graphics對象
    Bitmap bmpimg = new Bitmap(map.Width, map.Height, PixelFormat.Format32bppArgb);
    using (Graphics g = Graphics.FromImage(bmpimg))
    { 
        g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
        g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
        g.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
        g.DrawImage(map, 0, 0);
    }

    // 將二維碼插入圖片
    Graphics myGraphics = Graphics.FromImage(bmpimg);
    // 白底
    myGraphics.FillRectangle(Brushes.White, middleL, middleT, middleW, middleH);
    myGraphics.DrawImage(logo, middleL, middleT, middleW, middleH);

    // 保存生成圖片
    bmpimg.Save(@"D:\logo_qrcode.png", ImageFormat.Png);

}

/// <summary>
/// 識別二維碼、條形碼
/// </summary>
/// <param name="filename"></param>
/// <returns></returns>
static string ReadBarCode(string filename)
{ 
    BarcodeReader reader = new BarcodeReader();
    reader.Options.CharacterSet = "UTF-8";
    Bitmap map = new Bitmap(filename);
    Result result = reader.Decode(map);
    map.Dispose();

    return result == null ? "" : result.Text;
}