NPOI从数据库中导出数据到Excel

首先要添加NPOI.dll程序集 https://yunpan.cn/cMeSTELJSXmJJ 访问密码 8d83

把里面的程序集都添加到引用里

下面的代码是从数据库导出到Excel

 1   public void DaoChuExcel(string path) 2         {  //path是导出的excel要保存的路径
 3             using (Stream fs = new FileStream(path, FileMode.Create, FileAccess.Write))
 4             {  //创建一个表
 5                 XSSFWorkbook work = new XSSFWorkbook();
 6                //创建页
 7                 ISheet sheet = work.CreateSheet("zx");
 8                 List<MemberInfo> list = memDal.GetAllMemberByDelFlag(0);
 9                //创建行
10                 for (int i = 0; i < list.Count; i++)
11                 {
12                     IRow row = sheet.CreateRow(i); //定义excel中的一行
13                    
14                 
17                       //下面的Icell代表行中的单元格
18                     ICell cell2 = row.CreateCell(0, CellType.String); 
19                     cell2.SetCellValue(list[i].MemName);
20 
21                     ICell cell3 = row.CreateCell(1, CellType.String);
22                     cell3.SetCellValue(list[i].MemMobilePhone);
23 
24                     ICell cell4 = row.CreateCell(2, CellType.String);
25                     cell4.SetCellValue(list[i].MemAddress);
26 
27                     ICell cell5 = row.CreateCell(3, CellType.Numeric);
28                     cell5.SetCellValue(list[i].MemType);
29 
30                     ICell cell6 = row.CreateCell(4, CellType.String);
31                     cell6.SetCellValue(list[i].MemNum);
32 
33                     ICell cell7 = row.CreateCell(5, CellType.String);
34                     cell7.SetCellValue(list[i].MemGender);
35 
36                     ICell cell8 = row.CreateCell(6, CellType.Numeric);
37                     cell8.SetCellValue(list[i].MemDiscount);
38 
39                     ICell cell9 = row.CreateCell(7, CellType.Numeric);
40                     cell9.SetCellValue(list[i].MemMoney);
41 
42                     ICell cell10 = row.CreateCell(8, CellType.Numeric);
43                     cell10.SetCellValue(list[i].DelFlag);
44 
45                     ICell cell11 = row.CreateCell(9, CellType.String);
46                     cell11.SetCellValue(list[i].SubTime.ToShortDateString());
47 
48                     ICell cell12 = row.CreateCell(10, CellType.Numeric);
49                     cell12.SetCellValue(list[i].MemIntegral);
50 
51                     ICell cell13 = row.CreateCell(11, CellType.String);
52                     cell13.SetCellValue(list[i].MemEndTime.ToShortDateString());
53 
54                     ICell cell14 = row.CreateCell(12, CellType.String);
55                     cell14.SetCellValue(list[i].MemBirthday.ToShortDateString());
56                 }
57                 work.Write(fs);  //最后把表写入IO流中
58             
59             }
60         
61         }

下面是从excel中导入数据库

 1  public void ReadExcel(string path)
 2         {
 3             using (Stream fs = new FileStream(path,FileMode.Open,FileAccess.Read))  //从指定路径读入excel表
 4             {
 5                 List<MemberInfo> list = new List<MemberInfo>();
 6             //工作表
 7                 IWorkbook workbook = WorkbookFactory.Create(fs);
 8                 //获取页
 9                 ISheet sheet = workbook.GetSheetAt(0);
10                 //遍历行
11                 for (int i = 0; i <=sheet.LastRowNum; i++)
12                 {
13                     MemberInfo mem = new MemberInfo();
14                    //获取行
15                     IRow row = sheet.GetRow(i);
16 
17                     mem.MemName = row.GetCell(0).StringCellValue;
18                     mem.MemMobilePhone = row.GetCell(1).StringCellValue;
19                     mem.MemAddress = row.GetCell(2).StringCellValue;
20                     mem.MemType = Convert.ToInt32(row.GetCell(3).NumericCellValue);
21                     mem.MemNum = row.GetCell(4).StringCellValue;
22                     mem.MemGender = row.GetCell(5).StringCellValue;
23                     mem.MemDiscount = Convert.ToDouble(row.GetCell(6).NumericCellValue);
24                     mem.MemMoney = row.GetCell(7).NumericCellValue;
25                     mem.DelFlag = Convert.ToInt32(row.GetCell(8).NumericCellValue);
26 
27                     mem.SubTime =Convert.ToDateTime(row.GetCell(9).StringCellValue);
28                     mem.MemIntegral = Convert.ToInt32(row.GetCell(10).NumericCellValue);
29                     mem.MemEndTime = Convert.ToDateTime(row.GetCell(11).StringCellValue);
30                     mem.MemBirthday = Convert.ToDateTime(row.GetCell(12).StringCellValue);
31                     list.Add(mem);
32                 }
33                 memDal.AddMemberInfo(list);  //把数据体添加到数据库
34             }
35 
36         
37         }