在现在的项目中，较多的使用到二维码，现在介绍一个第三方组件，用于生成二维码。
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生成二维码：
///
/// 生成二维码
///
/// 带生成二维码的字符串
/// 路径
///
public static string CreatehoughtWorksQrCode(string content, string path)
{
if (string.IsNullOrEmpty(content))
{
throw new ArgumentNullException(content);
}
if (string.IsNullOrEmpty(path))
{
throw new ArgumentNullException(path);
}
var qrCodeEncoder = new QRCodeEncoder
{
QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE,
QRCodeScale = 4,
QRCodeVersion = 8,
QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M
};
Image p_w_picpath = qrCodeEncoder.Encode(content);
var filename = DateTime.Now.ToString("yyyymmddhhmmssfff") + ".jpg";
var filepath = string.Format("{0}{1}", path, filename);
FileStream fs = null;
try
{
fs = new FileStream(filepath, FileMode.OpenOrCreate, FileAccess.Write);
p_w_picpath.Save(fs, System.Drawing.Imaging.ImageFormat.Jpeg);
}
catch (IOException ex)
{
throw new IOException(ex.Message);
}
finally
{
if (fs != null) fs.Close();
p_w_picpath.Dispose();
}
return CodeDecoder(filepath);
}
2.解析二维码：
///
/// 二维码解码
///
/// 图片路径
///
public static string CodeDecoder(string filePath)
{
if (string.IsNullOrEmpty(filePath))
{
throw new ArgumentNullException(filePath);
}
try
{
if (!System.IO.File.Exists(filePath))
return null;
var myBitmap = new Bitmap(Image.FromFile(filePath));
var decoder = new QRCodeDecoder();
var decodedString = decoder.decode(new QRCodeBitmapImage(myBitmap));
return decodedString;
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
}
3.选择生成的二维码参数：
///
/// 选择生成二维码的相关类型
/// 要生成的文字或者数字，支持中文。如： "4408810820 深圳－广州" 或者：4444444444
/// 三种尺寸：BYTE ，ALPHA_NUMERIC，NUMERIC
/// 大小：L M Q H
/// 版本：如 8
/// 比例：如 4
///
///
public void CreateCode_Choose(string strData, string qrEncoding, string level, int version, int scale)
{
var qrCodeEncoder = new QRCodeEncoder();
var encoding = qrEncoding;
switch (encoding)
{
case "Byte":
qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE;
break;
case "AlphaNumeric":
qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.ALPHA_NUMERIC;
break;
case "Numeric":
qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.NUMERIC;
break;
default:
qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE;
break;
}
qrCodeEncoder.QRCodeScale = scale;
qrCodeEncoder.QRCodeVersion = version;
switch (level)
{
case "L":
qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.L;
break;
case "M":
qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M;
break;
case "Q":
qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.Q;
break;
default:
qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.H;
break;
}
Image p_w_picpath = null;
FileStream fs = null;
try
{
//文字生成图片
p_w_picpath = qrCodeEncoder.Encode(strData);
var filename = DateTime.Now.ToString("yyyymmddhhmmssfff") + ".jpg";
var filepath = HttpContext.Current.Server.MapPath(@"~\Upload") + "\\" + filename;
fs = new FileStream(filepath, FileMode.OpenOrCreate, FileAccess.Write);
p_w_picpath.Save(fs, System.Drawing.Imaging.ImageFormat.Jpeg);
}
catch (IOException ex)
{
throw new IOException(ex.Message);
}
finally
{
if (fs != null) fs.Close();
if (p_w_picpath != null) p_w_picpath.Dispose();
}
}
网站标题：C#运用QRCode生成二维码
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