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ASP.Net MVC利用NPOI导入导出Excel

时间:2020-04-15 16:31:40      阅读:81      评论:0      收藏:0      [点我收藏+]

标签:tor   files   怎么   anti   批量   catch   des   rem   创建excel文件   

因近期项目遇到所以记录一下:

1、导出Excel

首先引用NPOI包 (NPOI自行搜索下载)

(Action一定要用FileResult)

 1         [Localization]
 2         /// <summary>
 3         /// 导出Table的数据
 4         /// </summary>
 5         /// <returns></returns>
 6         public FileResult ExportExcel()
 7         {
 8             //string schoolname = "401";
 9             //创建Excel文件的对象
10             NPOI.HSSF.UserModel.HSSFWorkbook book = new NPOI.HSSF.UserModel.HSSFWorkbook();
11             //添加一个sheet
12             NPOI.SS.UserModel.ISheet sheet1 = book.CreateSheet("Sheet1");
13             //获取list数据
14             //DataTable dt = new DataTable();
15             //给sheet1添加第一行的头部标题
16             NPOI.SS.UserModel.IRow row1 = sheet1.CreateRow(0);
17             row1.CreateCell(0).SetCellValue(Resources.Common.ApplicationID);
18             row1.CreateCell(1).SetCellValue(Resources.Common.Order);
19             row1.CreateCell(2).SetCellValue(Resources.Common.Operation);
20             row1.CreateCell(3).SetCellValue(Resources.Common.Plant);
21             row1.CreateCell(4).SetCellValue(Resources.Common.WorkCenter);
22             row1.CreateCell(5).SetCellValue(Resources.Common.Quantity);
23             row1.CreateCell(6).SetCellValue(Resources.Common.WorkHour);
24             row1.CreateCell(7).SetCellValue(Resources.Common.Reason);
25             row1.CreateCell(8).SetCellValue("ECO#");
26             row1.CreateCell(9).SetCellValue(Resources.Common.Remark);
27             row1.CreateCell(10).SetCellValue(Resources.Common.Applicant);
28             row1.CreateCell(11).SetCellValue(Resources.Common.ApplicationStatus);
29             row1.CreateCell(12).SetCellValue(Resources.Common.ApplicationRemark);
30 
31             //将数据逐步写入sheet1各个行
32             for (int i = 0; i < dt_ex.Rows.Count; i++)
33             {
34                 NPOI.SS.UserModel.IRow rowtemp = sheet1.CreateRow(i + 1);
35                 rowtemp.CreateCell(0).SetCellValue(dt_ex.Rows[i]["ApplicationID"].ToString());
36                 rowtemp.CreateCell(1).SetCellValue(dt_ex.Rows[i]["OrderNo"].ToString());
37                 rowtemp.CreateCell(2).SetCellValue(dt_ex.Rows[i]["OperationNo"].ToString());
38                 rowtemp.CreateCell(3).SetCellValue(dt_ex.Rows[i]["Plant"].ToString());
39                 rowtemp.CreateCell(4).SetCellValue(dt_ex.Rows[i]["WorkCenter"].ToString());
40                 rowtemp.CreateCell(5).SetCellValue(dt_ex.Rows[i]["Finished_Qty"].ToString());
41                 rowtemp.CreateCell(6).SetCellValue(dt_ex.Rows[i]["WorkHour"].ToString());
42                 rowtemp.CreateCell(7).SetCellValue(dt_ex.Rows[i]["ReasonDescription"].ToString());
43                 rowtemp.CreateCell(8).SetCellValue(dt_ex.Rows[i]["ECO_No"].ToString());
44                 rowtemp.CreateCell(9).SetCellValue(dt_ex.Rows[i]["Remark"].ToString());
45                 rowtemp.CreateCell(10).SetCellValue(dt_ex.Rows[i]["name"].ToString());
46                 rowtemp.CreateCell(11).SetCellValue(dt_ex.Rows[i]["Description"].ToString());
47                 rowtemp.CreateCell(12).SetCellValue(dt_ex.Rows[i]["ApplicationRemark"].ToString());
48             }
49             // 写入到客户端 
50             System.IO.MemoryStream ms = new System.IO.MemoryStream();
51             book.Write(ms);
52             ms.Seek(0, SeekOrigin.Begin);
53             return File(ms, "application/vnd.ms-excel", "Application.xls");
54         }

前台直接写就可实现:

1  <div class="row">
2      <div class="form-group col-sm-offset-1">
3         <a class="btn btn-link" href="@Url.Action("ExportExcel","Search" )">@Resources.Common.Download</a>
4      </div>
5  </div>

2、导入Excel

首先说一些前台吧,mvc上传注意必须加 new { enctype = "multipart/form-data" }:

1 <td>
2      @using(@Html.BeginForm("ImportStu", "ProSchool", FormMethod.Post, new { enctype = "multipart/form-data" }))
3      {
4        <text>选择上传文件:(工作表名为“Sheet1”,“电脑号”在A1单元格。)</text>
5        <input name="file" type="file" id="file" />
6        <input type="submit" name="Upload" value="批量导入第一批电脑派位名册" />
7       }
8 </td>

后台实现:只传路径得出DataTable:

 1      /// <summary>
 2         /// Excel导入
 3         /// </summary>
 4         /// <param name="filePath"></param>
 5         /// <returns></returns>
 6         public DataTable ImportExcelFile(string filePath)
 7         {
 8             HSSFWorkbook hssfworkbook;
 9             #region//初始化信息
10             try
11             {
12                 using (FileStream file = new FileStream(filePath, FileMode.Open, FileAccess.Read))
13                 {
14                     hssfworkbook = new HSSFWorkbook(file);
15                 }
16             }
17             catch (Exception e)
18             {
19                 throw e;
20             }
21             #endregion
22 
23             using (NPOI.SS.UserModel.ISheet sheet = hssfworkbook.GetSheetAt(0))
24             {
25                 DataTable table = new DataTable();
26                 IRow headerRow = sheet.GetRow(0);//第一行为标题行
27                 int cellCount = headerRow.LastCellNum;//LastCellNum = PhysicalNumberOfCells
28                 int rowCount = sheet.LastRowNum;//LastRowNum = PhysicalNumberOfRows - 1
29 
30                 //handling header.
31                 for (int i = headerRow.FirstCellNum; i < cellCount; i++)
32                 {
33                     DataColumn column = new DataColumn(headerRow.GetCell(i).StringCellValue);
34                     table.Columns.Add(column);
35                 }
36                 for (int i = (sheet.FirstRowNum + 1); i <= rowCount; i++)
37                 {
38                     IRow row = sheet.GetRow(i);
39                     DataRow dataRow = table.NewRow();
40 
41                     if (row != null)
42                     {
43                         for (int j = row.FirstCellNum; j < cellCount; j++)
44                         {
45                             if (row.GetCell(j) != null)
46                                 dataRow[j] = GetCellValue(row.GetCell(j));
47                         }
48                     }
49 
50                     table.Rows.Add(dataRow);
51                 }
52                 return table;
53             }
54             
55         }

3、补充一个类

 1      /// <summary>
 2         /// 根据Excel列类型获取列的值
 3         /// </summary>
 4         /// <param name="cell">Excel列</param>
 5         /// <returns></returns>
 6         private static string GetCellValue(ICell cell)
 7         {
 8             if (cell == null)
 9                 return string.Empty;
10             switch (cell.CellType)
11             {
12                 case CellType.BLANK:
13                     return string.Empty;
14                 case CellType.BOOLEAN:
15                     return cell.BooleanCellValue.ToString();
16                 case CellType.ERROR:
17                     return cell.ErrorCellValue.ToString();
18                 case CellType.NUMERIC:
19                 case CellType.Unknown:
20                 default:
21                     return cell.ToString();//This is a trick to get the correct value of the cell. NumericCellValue will return a numeric value no matter the cell value is a date or a number
22                 case CellType.STRING:
23                     return cell.StringCellValue;
24                 case CellType.FORMULA:
25                     try
26                     {
27                         HSSFFormulaEvaluator e = new HSSFFormulaEvaluator(cell.Sheet.Workbook);
28                         e.EvaluateInCell(cell);
29                         return cell.ToString();
30                     }
31                     catch
32                     {
33                         return cell.NumericCellValue.ToString();
34                     }
35             }
36         }

得到DataTable后,就想怎么操作就怎么操作了

 

ASP.Net MVC利用NPOI导入导出Excel

标签:tor   files   怎么   anti   批量   catch   des   rem   创建excel文件   

原文地址:https://www.cnblogs.com/ning123/p/12706159.html

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