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c# - Epplus 添加条码图片问题

问题描述

我正在尝试使用 Epplus 将 BarCode 插入到 excel 中的单元格中。

这是一个 ASP.NET MVC 项目。

使用以下代码。

using System.IO;
using System.Web.Mvc;
using EmployeeIDBarcodeGeneration.Models;
using OfficeOpenXml;
using ZXing;   

public void ExportExcel()
        {
            List<EmployeeID> EmployeeIDs = new List<EmployeeID> {
                new EmployeeID { EmployeeName="Employee A",EmployeeIDnumber="A222"},
                new EmployeeID { EmployeeName ="Employee B", EmployeeIDnumber = "A333" },
                new EmployeeID { EmployeeName ="Employee C", EmployeeIDnumber = "A444" }
            };

            ExcelPackage.LicenseContext = LicenseContext.NonCommercial;
            ExcelPackage pck = new ExcelPackage();
            ExcelWorksheet ws = pck.Workbook.Worksheets.Add("Report");

            ws.Cells["A1"].Value = "EmployeeName";
            ws.Cells["B1"].Value = "EmployeeIDnumber";
            ws.Cells["C1"].Value = "Barcode";
          
            int rowStart = 2;
            BarcodeWriter bw = new BarcodeWriter();
            bw.Format = BarcodeFormat.CODE_39;
            bw.Options.Width = 200;
            bw.Options.Height = 100;
            bw.Options.PureBarcode = false;
           
            foreach (var item in EmployeeIDs)
            {
                ws.Cells[string.Format("A{0}", rowStart)].Value = item.EmployeeName;
                ws.Cells[string.Format("B{0}", rowStart)].Value = item.EmployeeIDnumber;
                Bitmap bitmap = bw.Write(item.EmployeeIDnumber);
                var picture = ws.Drawings.AddPicture(item.EmployeeIDnumber, bitmap);
                ws.Cells[string.Format("C{0}", rowStart)].Value = picture;
                rowStart++;               
            }
            ws.Cells["A:AZ"].AutoFitColumns();
            Response.Clear();
            Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
            Response.AppendHeader("content-disposition", "attachment;filename=" + "ExcelReport.xlsx");
            Response.BinaryWrite(pck.GetAsByteArray());
            Response.End();
        }

但条形码图像无法正确放置在单元格中。

我该怎么办 ？

谢谢 ！！

标签： c#.netexcelasp.net-mvcepplus

解决方案

您需要设置图表位置：

picture.SetPosition(rowStart-1, 0, 2, 0);

这是完整的代码：

public void DownloadExcelFile()
        {
            List<EmployeeID> EmployeeIDs = new List<EmployeeID> {
                new EmployeeID { EmployeeName="Employee A",EmployeeIDnumber="A222"},
                new EmployeeID { EmployeeName ="Employee B", EmployeeIDnumber = "A333" },
                new EmployeeID { EmployeeName ="Employee C", EmployeeIDnumber = "A444" }
            };

            ExcelPackage.LicenseContext = LicenseContext.NonCommercial;
            ExcelPackage pck = new ExcelPackage();
            ExcelWorksheet ws = pck.Workbook.Worksheets.Add("Report");

            ws.Cells["A1"].Value = "EmployeeName";
            ws.Cells["B1"].Value = "EmployeeIDnumber";
            ws.Cells["C1"].Value = "Barcode";

            int rowStart = 2;
            BarcodeWriter bw = new BarcodeWriter();
            bw.Format = BarcodeFormat.CODE_39;
            bw.Options.Width = 200;
            bw.Options.Height = 40;
            bw.Options.PureBarcode = false;

            foreach (var item in EmployeeIDs)
            {
                string STsrc = "/Home/BarCodeImg?code=" + item.EmployeeIDnumber + "&width=300&height=50";
                ws.Cells[string.Format("A{0}", rowStart)].Value = item.EmployeeName;
                ws.Cells[string.Format("B{0}", rowStart)].Value = item.EmployeeIDnumber;
                Bitmap bitmap = bw.Write(item.EmployeeIDnumber);
                var picture = ws.Drawings.AddPicture(item.EmployeeIDnumber, bitmap);
                picture.SetPosition(rowStart-1, 0, 2, 0);
                rowStart++;
            }
            ws.Cells["A:AZ"].AutoFitColumns();
            Response.Clear();
            Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
            Response.AppendHeader("content-disposition", "attachment;filename=" + "ExcelReport.xlsx");
            Response.BinaryWrite(pck.GetAsByteArray());
            Response.End();

        }

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