ASP.NET实现二维码（QRCode）的创建和读取实例(4)

QRCodeDecoder decoder = new QRCodeDecoder();                        
                        Bitmap bm = new Bitmap(filepath);
                        qrdecode = decoder.decode(new QRCodeBitmapImage(bm));
                        bm.Dispose();                 
                       
                        context.Response.Write("[{\"count\":1,\"list\":[{\"imgurl\":\"upload/" + filename + "\",\"qrtext\":\"" + qrdecode + "\"}]}]");
                    }
                }
                else
                {
                    context.Response.Write("[{\"count\":0,\"list\":[{\"error\":\"没有上传文件\"}]}]");
                }
                break;
            case "set":
                string txt_qr =ConverToGB(context.Request["txt_qr"].ToString().Trim(), 16);
                string qrEncoding = context.Request["qrEncoding"].ToString();
                string Level = context.Request["Level"].ToString();
                string txt_ver = context.Request["txt_ver"].ToString();
                string txt_size = context.Request["txt_size"].ToString();

QRCodeEncoder qrCodeEncoder = new QRCodeEncoder();
                String encoding = qrEncoding;
                if (encoding == "Byte")
                {
                    qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE;
                }
                else if (encoding == "AlphaNumeric")
                {
                    qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.ALPHA_NUMERIC;
                }
                else if (encoding == "Numeric")
                {
                    qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.NUMERIC;
                }
                try
                {
                    int scale = Convert.ToInt16(txt_size);
                    qrCodeEncoder.QRCodeScale = scale;
                }
                catch (Exception ex)
                {
                    return;
                }
                try
                {
                    int version = Convert.ToInt16(txt_ver);
                    qrCodeEncoder.QRCodeVersion = version;
                }
                catch (Exception ex)
                {
                    return;
                }
                string errorCorrect = Level;
                if (errorCorrect == "L")
                    qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.L;
                else if (errorCorrect == "M")
                    qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M;
                else if (errorCorrect == "Q")
                    qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.Q;
                else if (errorCorrect == "H")
                    qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.H;