asp.net core web的导入导出excel功能

 

这里主要记录下asp.net core web页面上进行导入导出excel的操作。

主要是导入,因为现在使用的很多前端框架(例如kendo ui)本身就有导出的功能。

 

这里使用到EPPlus.Core,其实对于excel的导入导出还可以使用NPOI,

这里讲解EPPlus的方式

 

1.创建asp.net core web (mvc)项目

效果图如下

 

 2.在项目上右键,进入nuget管理器,安装EPPlus.Core

 

3.添加一个XlsxController控制器,在其中添加导入和导出功能

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using OfficeOpenXml;

namespace EPPlusDemo.Controllers
{
    public class XlsxController : Controller
    {
        //用来获取路径相关
        private IHostingEnvironment _hostingEnvironment;

        public XlsxController(IHostingEnvironment hostingEnvironment)
        {
            _hostingEnvironment = hostingEnvironment;
        }
        public IActionResult Index()
        {
            return View();
        }

        /// <summary>
        /// excel导出功能
        /// </summary>
        /// <returns></returns>
        public IActionResult Export()
        {
            string sWebRootFolder = _hostingEnvironment.WebRootPath;
            string sFileName = $"{Guid.NewGuid()}.xlsx";
            FileInfo file = new FileInfo(Path.Combine(sWebRootFolder, sFileName));  //Path.Combine把多个字符串组成一个路径
            using (ExcelPackage package = new ExcelPackage(file))   //ExcelPackage 操作excel的主要对象
            {
                // 添加worksheet
                ExcelWorksheet worksheet = package.Workbook.Worksheets.Add("aspnetcore");
                //添加头
                worksheet.Cells[1, 1].Value = "ID";
                worksheet.Cells[1, 2].Value = "Name";
                worksheet.Cells[1, 3].Value = "Url";
                //添加值
                worksheet.Cells["A2"].Value = 1000;
                worksheet.Cells["B2"].Value = "baidu";
                worksheet.Cells["C2"].Value = "https://www.baidu.com/";

                worksheet.Cells["A3"].Value = 1001;
                worksheet.Cells["B3"].Value = "博客园";
                worksheet.Cells["C3"].Value = "https://www.cnblogs.com/";
                worksheet.Cells["C3"].Style.Font.Bold = true;

                package.Save();
            }
            return File(sFileName, "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
        }

     //导入功能 [HttpPost]
public IActionResult Import(IFormFile excelfile) { string sWebRootFolder = _hostingEnvironment.WebRootPath; string sFileName = $"{Guid.NewGuid()}.xlsx"; FileInfo file = new FileInfo(Path.Combine(sWebRootFolder, sFileName)); try { //把excelfile中的数据复制到file中 using (FileStream fs = new FileStream(file.ToString(), FileMode.Create)) //初始化一个指定路径和创建模式的FileStream { excelfile.CopyTo(fs); fs.Flush(); //清空stream的缓存,并且把缓存中的数据输出到file } using (ExcelPackage package = new ExcelPackage(file)) { StringBuilder sb = new StringBuilder(); ExcelWorksheet worksheet = package.Workbook.Worksheets[1]; int rowCount = worksheet.Dimension.Rows; int ColCount = worksheet.Dimension.Columns; for (int row = 1; row <= rowCount; row++) { for (int col = 1; col <= ColCount; col++) { //sb.Append(worksheet.Cells[row, col].Value.ToString() + "\t"); //这种写法遇到为null的为报错 sb.Append(worksheet.Cells[row, col].Value + "\t"); } sb.Append(Environment.NewLine); } return Content(sb.ToString()); } } catch (Exception ex) { return Content(ex.Message); } } }

 

4.在 Xlsx / Index.cshtml 文件上进行如下编辑

@{
    ViewData["Title"] = "Index";
}


<h2>ASP.NET Core 导入导出Excel xlsx 文件</h2>
<a asp-action="Export">导出Excel</a> <hr />

<!--导入--> <form enctype="multipart/form-data" method="post" asp-action="Import"> <input type="file" name="excelfile" /> <input type="submit" value="上传" /> </form>

 

5.运行程序,效果如下

 

 

最后,附上参考网址:  

 https://www.cnblogs.com/linezero/p/aspnetcoreexcel.html

后续继续学习网址:

https://github.com/JanKallman/EPPlus/wiki

 

posted @ 2019-05-22 23:35  Vincent-yuan  阅读(...)  评论(...编辑  收藏