NPOI 利用DataTable导出Excel 2003和2007

 1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Text;
 5 using System.Threading.Tasks;
 6 using System.IO;
 7 using NPOI.XSSF.UserModel;//导出2007
 8 using NPOI.HSSF.UserModel;//导出2003
 9 using NPOI.SS.UserModel;
10 using NPOI.SS.Util;
11 using NPOI.HPSF;
12 using System.Data;
13 using System.Web;
14 
15 namespace MES.Common
16 {
17     public class ExcelExportHelper
18     {
19         public static void Export2003(DataTable dt, string filePath)
20         {
21             NPOI.HSSF.UserModel.HSSFWorkbook book = new NPOI.HSSF.UserModel.HSSFWorkbook();
22             NPOI.SS.UserModel.ISheet sheet = book.CreateSheet(dt.TableName);
23 
24             NPOI.SS.UserModel.IRow row = sheet.CreateRow(0);
25             for (int i = 0; i < dt.Columns.Count; i++)
26             {
27                 row.CreateCell(i).SetCellValue(dt.Columns[i].ColumnName);
28             }
29             for (int i = 0; i < dt.Rows.Count; i++)
30             {
31                 NPOI.SS.UserModel.IRow row2 = sheet.CreateRow(i + 1);
32                 for (int j = 0; j < dt.Columns.Count; j++)
33                 {
34                     row2.CreateCell(j).SetCellValue(Convert.ToString(dt.Rows[i][j]));
35                 }
36             }
37             // 写入到客户端  
38             using (System.IO.MemoryStream ms = new System.IO.MemoryStream())
39             {
40                 book.Write(ms);
41                 using (FileStream fs = new FileStream(filePath, FileMode.Create, FileAccess.Write))
42                 {
43                     byte[] data = ms.ToArray();
44                     fs.Write(data, 0, data.Length);
45                     fs.Flush();
46                 }
47                 book = null;
48             }
49 
50         }
51 
52         public static void Export2007(DataTable dt, string filePath)
53         {
54             XSSFWorkbook book = new XSSFWorkbook();
55             ISheet sheet1 = book.CreateSheet("data");
56             IRow dataRow = sheet1.CreateRow(0);
57             foreach (DataColumn column in dt.Columns)
58             {
59                 dataRow.CreateCell(column.Ordinal).SetCellValue(column.ColumnName);
60             }
61             //填充内容
62             for (int i = 0; i < dt.Rows.Count; i++)
63             {
64                 dataRow = sheet1.CreateRow(i + 1);
65                 for (int j = 0; j < dt.Columns.Count; j++)
66                 {
67                     dataRow.CreateCell(j).SetCellValue(dt.Rows[i][j].ToString());
68                 }
69             }
70             // 写入到客户端  
71             using (System.IO.MemoryStream ms = new System.IO.MemoryStream())
72             {
73                 book.Write(ms);
74                 using (FileStream fs = new FileStream(filePath, FileMode.Create, FileAccess.Write))
75                 {
76                     byte[] data = ms.ToArray();
77                     fs.Write(data, 0, data.Length);
78                     fs.Flush();
79                 }
80                 book = null;
81             }
82         }
83     }
84 }