C# zxing二维码写入的实例代码

private void button1_click(object sender, eventargs e)
        {
            if (string.isnullorempty(this.textbox1.text.trim()))
            {
                messagebox.show("请输入需要转换的信息！");
                return;
            }

            string content = textbox1.text;

            hashtable hints= new hashtable();  
            hints.add(encodehinttype.error_correction, errorcorrectionlevel.l);//纠错级别
            hints.add(encodehinttype.character_set, "utf-8");//编码格式

            bytematrix bytematrix = new multiformatwriter().encode(content, barcodeformat.qr_code, 300, 300, hints);
            bitmap bitmap = tobitmap(bytematrix);
            picturebox1.image = bitmap;

            savefiledialog sfd = new savefiledialog();
            sfd.filter = "*.png|*.png";
            sfd.addextension = true;
            try
            {
                if (sfd.showdialog() == dialogresult.ok)
                {
                    writetofile(bytematrix, system.drawing.imaging.imageformat.png, sfd.filename);
                }
            }
            catch (exception ex)
            {
                messagebox.show(ex.message);
            }

        }

        public static void writetofile(bytematrix matrix, system.drawing.imaging.imageformat format, string file)
        {
            system.drawing.imaging.encoderparameters eps = new system.drawing.imaging.encoderparameters();
            eps.param[0] = new system.drawing.imaging.encoderparameter(system.drawing.imaging.encoder.quality, 100l);
            bitmap bmap = tobitmap(matrix);
            bmap.save(file, format);
        }
        public static bitmap tobitmap(bytematrix matrix)
        {
            int width = matrix.width;
            int height = matrix.height;
            bitmap bmap = new bitmap(width, height, system.drawing.imaging.pixelformat.format32bppargb);
            for (int x = 0; x < width; x++)
            {
                for (int y = 0; y < height; y++)
                {
                    bmap.setpixel(x, y, matrix.get_renamed(x, y) != -1 ? colortranslator.fromhtml("purple") : colortranslator.fromhtml("0xffffffff"));//可以自定义颜色和背景色
                }
            }

            return bmap;    
        }