c# 从sql 数据库生成 excel (转)

首先要在工程中添加com引用，选择Microsoft Excel 11.0 Object Liberty。

源代码如下（本例是在下生成公司的考勤表 测试代码）：

1 using System;

2 using System.Collections.Generic;

3 using System.ComponentModel;

4 using System.Data;

5 using System.Drawing;

6 using System.Text;

7 using System.Windows.Forms;

8 using System.Data.SqlClient;

9 using Microsoft.Office.Interop.Excel;

10 using System.IO;

11 //using Microsoft.Office.Interop.Excel;

12

13 namespace AttToExcel

14 {

15 public
partial
class Form1 : Form

16 {

17 public Form1()

18 {

19 InitializeComponent();

20 }

21

22 private
void button1_Click(object sender, EventArgs e)

23 {

24 Microsoft.Office.Interop.Excel.Application excel
= new Microsoft.Office.Interop.Excel.Application();

25 int rowIndex
= 1;

26 int colIndex
= 0;

27 excel.Application.Workbooks.Add(true);

28 System.Data.DataTable table
= GetData();

29 // dealTable(table);

30

31 //将所得到的表的列名,赋值给单元格

32 foreach (DataColumn col
in table.Columns)

33 {

34 colIndex++;

35 excel.Cells[1, colIndex]
= col.ColumnName;

36 }

37

38

39 //同样方法处理数据

40 foreach (DataRow row
in table.Rows)

41 {

42 rowIndex++;

43 colIndex
= 0;

44 foreach (DataColumn col
in table.Columns)

45 {

46 colIndex++;

47 excel.Cells[rowIndex, colIndex]
= row[col.ColumnName].ToString();

48 }

49 }

50

51 Worksheet ws
= (Worksheet)excel.ActiveSheet;

52 AutoFitColumn(ws,
5);

53 //true则直接用excel打开得到的数据

54 excel.Visible
= true ;

55

56 }

57 //进行加班处理

58 private
void dealTable(System.Data.DataTable table)

59 {

60

61 }

62 //让excel列宽自适应宽度

63 public
static
void AutoFitColumn(Worksheet ws,
int col)

64 {

65 ((Range)ws.Cells[1, col]).EntireColumn.AutoFit();

66 }

67 //获取数据库打卡记录数据

68 private System.Data.DataTable GetData()

69 {

70 SqlConnection conn=
new SqlConnection(@"Server=127.0.0.1;Initial Catalog=attendance;Uid=sa;Pwd=;");

71 String sqlText
= sql;

73

89 SqlDataAdapter adapter
= new SqlDataAdapter(sqlText, conn);

90

91 DataSet ds=
new DataSet();

92 try

93 {

94 adapter.Fill(ds,"Customer");

95 }

96 catch(Exception ex)

97 {

98 MessageBox.Show(ex.ToString());

99 }

100 return ds.Tables[0];

101 }//end GetData()

102

103 }//end public partial class

104 }//end namespace
复制代码