/// <summary>/// 根据提交的内容显示二维码/// </summary>        protected void btn_Click(object sender, EventArgs e){QRCodeEncoder enCoder = new QRCodeEncoder();enCoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE;enCoder.QRCodeBackgroundColor = Color.White;enCoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M;enCoder.QRCodeScale = 4;//等级越大像素越高enCoder.QRCodeVersion = 7;//生成了二维码图片Bitmap map = enCoder.Encode(txtUrl.Text.Trim());//将图片保存在本地string filePath = @"F:\google下载\QRCode\";if (!Directory.Exists(filePath)){Directory.CreateDirectory(filePath);}string imgName=Guid.NewGuid().ToString().Replace("-","");string Path=filePath + imgName + ".png";map.Save(Path);            map.Dispose();img.ImageUrl = "http://****:55/" + imgName + ".png";}

效果:
备注：生成二维码图片保存到本地后，我没有想到好的方法呈现在页面，只是在iis上 将保存图片的文件夹发出来在直接访问。对此，期待指点。

下面是将二维码导出到excel 表处理
//将数据整合生成excel

public static MemoryStream DealData(List<NewList> DataList){HSSFWorkbook workbook = new HSSFWorkbook();ISheet sheet = workbook.CreateSheet("Sheet1");//10列sheet.SetColumnWidth(0, 8 * 256 + 200);sheet.SetColumnWidth(1, 8 * 256 + 200);sheet.SetColumnWidth(2, 8 * 256 + 200);sheet.SetColumnWidth(3, 8 * 256 + 200);sheet.SetColumnWidth(4, 8 * 256 + 200);sheet.SetColumnWidth(5, 8 * 256 + 200);sheet.SetColumnWidth(6, 8 * 256 + 200);sheet.SetColumnWidth(7, 8 * 256 + 200);sheet.SetColumnWidth(8, 8 * 256 + 200);sheet.SetColumnWidth(9, 20 * 256 + 200);//图片列//通用样式ICellStyle headStyle = workbook.CreateCellStyle();headStyle.Alignment = HorizontalAlignment.Left;headStyle.VerticalAlignment = VerticalAlignment.Center;IFont font = workbook.CreateFont();font.FontHeightInPoints = 10;font.Boldweight = 30;headStyle.SetFont(font);int rowIndex = 0;#region 表头及样式{IRow headerRow = sheet.CreateRow(rowIndex);headerRow.HeightInPoints = 20;                string[] Header = { "单位", "编码", "厂家", "型号", "功率", "启用日期", "操作人", "操作时间", "油机状态", "二维码" };for (int i = 0; i < Header.Length; i++){headerRow.CreateCell(i).SetCellValue(Header[i]);headerRow.GetCell(i).CellStyle = headStyle;}rowIndex++;}#endregion#region 填充数据for (int j = 0; j <DataList.Count() ; j++){IRow rows = sheet.CreateRow(rowIndex);rows.HeightInPoints = 110;//二维码原大小呈现，行高大int num = 0;//列指针rows.CreateCell(num).SetCellValue(DataList[j].Orgname);//单位rows.GetCell(num++).CellStyle = headStyle;rows.CreateCell(num).SetCellValue(DataList[j].Engine.Num);//编码rows.GetCell(num++).CellStyle = headStyle;rows.CreateCell(num).SetCellValue(DataList[j].Engine.Manufactor);//厂家rows.GetCell(num++).CellStyle = headStyle;rows.CreateCell(num).SetCellValue(DataList[j].Engine.Model);//型号rows.GetCell(num++).CellStyle = headStyle;rows.CreateCell(num).SetCellValue(DataList[j].Engine.Power.HasValue ? DataList[j].Engine.Power.ToString() : "");//功率rows.GetCell(num++).CellStyle = headStyle;rows.CreateCell(num).SetCellValue(DataList[j].Engine.EnableTime.HasValue ? DataList[j].Engine.EnableTime.ToString() : "");//启用日期rows.GetCell(num++).CellStyle = headStyle;rows.CreateCell(num).SetCellValue(DataList[j].realityName);//操作人rows.GetCell(num++).CellStyle = headStyle;rows.CreateCell(num).SetCellValue(DataList[j].Engine.DateInfo.ToString());//操作时间rows.GetCell(num++).CellStyle = headStyle;rows.CreateCell(num).SetCellValue(DataList[j].MachineStateText);//油机状态                rows.GetCell(num++).CellStyle = headStyle;//处理二维码图片AddPieChartMerage(sheet, workbook, DataList[j].Engine.QRCodePhoto, rowIndex, num, 0,true);rowIndex++;}#endregionusing (MemoryStream ms = new MemoryStream()){workbook.Write(ms);ms.Flush();ms.Position = 0;sheet = null;workbook = null;return ms;}}

处理图片

///totalFileURL 图片完整路径  private static void AddPieChartMerage(ISheet sheet, HSSFWorkbook workbook, string totalFileURL, int row, int col, int MerageColCount,bool isResize=false){try{HSSFPatriarch patriarch = (HSSFPatriarch)sheet.CreateDrawingPatriarch();//处理照片位置，【图片左上角为（col, row）第row+1行col+1列，右下角为（ col +1, row +1）第 col +1+1行row +1+1列，宽为100，高为50HSSFClientAnchor anchor = new HSSFClientAnchor(0, 0, 100, 50, col, row, col + 1, row + 1);int i = 0;foreach (var fileurl in totalFileURL.Split(';')){string path = fileurl;byte[] bytes = System.IO.File.ReadAllBytes(path);if (!string.IsNullOrEmpty(path)){int pictureIdx = workbook.AddPicture(bytes, NPOI.SS.UserModel.PictureType.JPEG);anchor = new HSSFClientAnchor(i * 100, 0, i * 100 + 100, 0, col, row, col + 1 + MerageColCount, row + 1);HSSFPicture pict = (HSSFPicture)patriarch.CreatePicture(anchor, pictureIdx);if (isResize)//是否显示图片原大小{pict.Resize();}}i++;}}catch (Exception){//throw ex;}}

效果：

Mark:
生成待logo的二维码：http://www.jb51.net/article/104639.htm
二维码的编码/解码：https://www.cnblogs.com/xuhang/p/3832118.html