Net Core 3.0 EPPlus对Excel导入导出
作者：互联网
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 }
View Code
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 }
View Code
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 }
View Code
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 }
View Code
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>
View Code
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。
标签：Core,Style,sheet,worksheet,Cells,Excel,Value,EPPlus 来源： https://www.cnblogs.com/TRMan/p/12175563.html