1：EPPlus.core 弃用的情况下（EPPlus.core 不支持net Core3.0）可使用 EPPlus 包 【因文件超10M，在最下面提供百度网盘地址】
2：EPPlus 引用方式
A）工具---->NuGet 包管理器--->管理解决方案的NuGet程序包--->搜索安装
B） 工具---->NuGet 包管理器--->程序包管理器控制台--->Install-Package EPPlus
3：导出
a:工具方法
1 /// <summary> 2 /// 导出 3 /// </summary> 4 /// <param name="ePPlus"></param> 5 /// <returns></returns> 6 public static MemoryStream Export(ICollection<EPPlus> ePPlus) 7 { 8 MemoryStream stream = new MemoryStream(); 9 ExcelPackage package = new ExcelPackage(stream); 10 11 package.Workbook.Worksheets.Add("EPPlus"); 12 ExcelWorksheet sheet = package.Workbook.Worksheets[0]; 13 14 #region write header 15 sheet.Cells[1, 1].Value = "用户名"; 16 sheet.Cells[1, 2].Value = "年龄"; 17 sheet.Cells[1, 3].Value = "性别"; 18 sheet.Cells[1, 4].Value = "成绩"; 19 20 using (ExcelRange range = sheet.Cells[1, 1, 1, 4]) 21 { 22 range.Style.Fill.PatternType = OfficeOpenXml.Style.ExcelFillStyle.Solid; 23 range.Style.Fill.BackgroundColor.SetColor(Color.Gray); 24 range.Style.Border.Bottom.Style = OfficeOpenXml.Style.ExcelBorderStyle.Thick; 25 range.Style.Border.Bottom.Color.SetColor(Color.Black); 26 range.AutoFitColumns(4); 27 } 28 #endregion 29 30 #region write content 31 int pos = 2; 32 foreach (EPPlus s in ePPlus) 33 { 34 sheet.Cells[pos, 1].Value = s.Name; 35 sheet.Cells[pos, 2].Value = s.Age; 36 sheet.Cells[pos, 3].Value = s.Gender; 37 sheet.Cells[pos, 4].Value = s.Achievement; 38 39 using (ExcelRange range = sheet.Cells[pos, 1, pos, 4]) 40 { 41 range.Style.Border.Bottom.Style = OfficeOpenXml.Style.ExcelBorderStyle.Thin; 42 range.Style.Border.Bottom.Color.SetColor(Color.Black); 43 range.Style.HorizontalAlignment = OfficeOpenXml.Style.ExcelHorizontalAlignment.Left; 44 } 45 46 pos++; 47 } 48 #endregion 49 50 package.Save(); 51 52 return stream; 53 }
b:Controller
1 private const string contentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"; 2 private const string fileDownloadName = "EPPlusDemo.xlsx"; 3 4 /// <summary> 5 /// 导出 6 /// </summary> 7 /// <returns></returns> 8 public FileResult Export() 9 { 10 MemoryStream stream = EPPlusTool.Export(EPPlusTool.EPPlus); 11 return File(stream.ToArray(), contentType, fileDownloadName); 12 }
4：导入以及下载Excel
a:工具方法
1 /// <summary> 2 /// 导入 3 /// </summary> 4 /// <param name="package"></param> 5 /// <param name="worksheet"></param> 6 /// <returns></returns> 7 public static ICollection<EPPlus> Import(ExcelPackage package, ExcelWorksheet worksheet) 8 { 9 ICollection<EPPlus> ePPlus = new List<EPPlus>(); 10 11 var rowCount = worksheet.Dimension?.Rows; 12 var colCount = worksheet.Dimension?.Columns; 13 #region check excel format 14 if (!rowCount.HasValue || !colCount.HasValue) 15 { 16 return ePPlus; 17 //return "文档表头或内容为空，请下载对应文档！"; 18 } 19 if(!worksheet.Cells[1,1].Value.Equals("Name") || 20 !worksheet.Cells[1, 2].Value.Equals("Age") || 21 !worksheet.Cells[1, 3].Value.Equals("Gender") || 22 !worksheet.Cells[1, 4].Value.Equals("Achievement") || 23 !worksheet.Cells[2, 1].Value.Equals("用户名") || 24 !worksheet.Cells[2, 2].Value.Equals("年龄") || 25 !worksheet.Cells[2, 3].Value.Equals("性别") || 26 !worksheet.Cells[2, 4].Value.Equals("成绩")) 27 { 28 return ePPlus; 29 //return "文档表头或内容不对应，请下载对应文档！"; 30 } 31 #endregion 32 #region read datas 若读取数据库，可写事务拼接sql执行，前端重新加载页面即可 33 for(int i=3; i<= rowCount; i++) 34 { 35 ePPlus.Add(new EPPlus 36 { 37 Name = worksheet.Cells[i, 1].Value.ToString(), 38 Age = Convert.ToInt32(worksheet.Cells[i, 2].Value.ToString()), 39 Gender = (Gender)Enum.Parse(typeof(Gender), worksheet.Cells[i, 3].Value.ToString()), 40 Achievement = Convert.ToDouble(worksheet.Cells[i,4].Value.ToString()) 41 }) ; 42 } 43 #endregion 44 return ePPlus; 45 }
b:Controller
1 public async Task<IActionResult> Import(IFormFile file) 2 { 3 if (file == null || file.Length==0) 4 { 5 ViewBag.Message = "The document is empty, please select a file!"; 6 } 7 else 8 { 9 using(var memoryStream=new MemoryStream()) 10 { 11 await file.CopyToAsync(memoryStream).ConfigureAwait(false); 12 using(var package=new ExcelPackage(memoryStream)) 13 { 14 var worksheet = package.Workbook.Worksheets[0]; // Tip: To access the first worksheet, try index 1, not 0 15 ICollection<EPPlus> ePPlus = EPPlusTool.Import(package, worksheet); 16 EPPlusTool.EPPlus = ePPlus; 17 } 18 } 19 } 20 21 ViewBag.EPPlus = EPPlusTool.EPPlus; 22 return View("Index"); 23 }
5：cshtml页面代码
1 @{ 2 Layout = null; 3 } 4 5 <!DOCTYPE html> 6 7 <html> 8 <head> 9 <meta name="viewport" content="width=device-width" /> 10 <title>Index</title> 11 <script src="~/lib/bootstrap/dist/js/bootstrap.js"></script> 12 <link href="~/lib/bootstrap/dist/css/bootstrap.css" rel="stylesheet" /> 13 <script src="~/lib/jquery/dist/jquery.min.js"></script> 14 <script src="~/lib/bootstrap/dist/js/bootstrap.min.js"></script> 15 <link href="~/lib/bootstrap/dist/css/bootstrap-reboot.min.css" /> 16 </head> 17 <body> 18 <div style="width:80%;margin:0 auto;margin-top:50px;"> 19 @Html.ActionLink("导出", "Export", "EPPlus", null, new { @class = "btn btn-primary", @style = "margin-left:86%" }) 20 <button type="button" class="btn btn-success" data-toggle="modal" data-target="#myModal">导入</button> 21 </div> 22 <table class="table table-bordered" style="width:80%;margin:0 auto;margin-top:20px"> 23 <thead> 24 <tr> 25 <td>用户名</td> 26 <td>年龄</td> 27 <td>性别</td> 28 <td>成绩</td> 29 </tr> 30 </thead> 31 <tbody> 32 @foreach (EPPlus ePPlus in ViewBag.EPPlus) 33 { 34 <tr> 35 <td>@ePPlus.Name</td> 36 <td>@ePPlus.Age</td> 37 <td>@ePPlus.Gender</td> 38 <td>@ePPlus.Achievement</td> 39 </tr> 40 } 41 </tbody> 42 </table> 43 44 @*模态框*@ 45 <form method="post" asp-action="Import" asp-controller="EPPlus" enctype="multipart/form-data"> 46 <div class="modal fade" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true"> 47 <div class="modal-dialog"> 48 <div class="modal-content" style="height: 100%;width: 450px;margin-top: 20px;"> 49 <div class="modal-header"> 50 <button type="button" class="close" data-dismiss="modal" 51 aria-hidden="true"> 52 × 53 </button> 54 </div> 55 <table class="table table-borderless" style="width:100%"> 56 <tr> 57 <td><a href="~/EPPlus/EPPlusDemo.xlsx">下载模板</a></td> 58 </tr> 59 <tr> 60 <td>上传</td> 61 </tr> 62 <tr> 63 <td><input type="file" name="file" /> <span style="color:red;">@ViewBag.Message</span></td> 64 </tr> 65 66 </table> 67 68 <div style="margin-top:30px;margin-bottom:10px;margin-left:150px"> 69 <button type="submit" class="btn btn-success" style="margin-right:5px" data-dismiss="none" id="btu-Ses">导入</button> 70 <button type="button" class="btn btn-light" data-dismiss="modal">返回</button> 71 72 </div> 73 </div> 74 </div> 75 </div> 76 </form> 77 <script> 78 //function Chuan() { 79 // $.ajax({ 80 // url: "/EPPlus/Import", 81 // type: "post", 82 // data: { 83 // c: $(".file") 84 // }, 85 // success: function (data) { 86 // $("#btu-Ses").attr("data-dismiss", "modal") 87 // }, 88 // error: function () { 89 // alert("不执行"); 90 // } 91 // }) 92 //} 93 </script> 94 </body> 95 </html>
总结：
链接：https://pan.baidu.com/s/1VuGl26ugdPrYmEnB4bdtuQ 提取码：77dm
由于本人为菜鸟一枚，有更有效的完指导，望提醒，谢谢。