Imports System.Data
Imports System.Data.SqlClient
Imports Excel = Microsoft.Office.Interop.Excel
Public Class excel
‘添加按钮
Private Sub Button1_Click(ByVal sender As System.Object,ByVal e As System.EventArgs) _
Handles Button1.Click
Try
'创建连接
Dim cnn As DataAccess = New DataAccess(CONNECTION_STRING)
Dim i,j As Integer
'创建Excel对象
Dim xlApp As Microsoft.Office.Interop.Excel.Application
Dim xlWorkBook As Microsoft.Office.Interop.Excel.Workbook
Dim xlWorkSheet As Microsoft.Office.Interop.Excel.Worksheet
Dim misValue As Object = System.Reflection.Missing.Value
xlApp = New Microsoft.Office.Interop.Excel.ApplicationClass
xlWorkBook = xlApp.Workbooks.Add(misValue)
' 打开某一个表单
xlWorkSheet = xlWorkBook.Sheets("sheet1")
' sql查询
' xlWorkBook.Sheets.Select("A1:A2")
Dim sql As String = "SELECT * FROM EMP"
' SqlAdapter
Dim dscmd As New SqlDataAdapter(sql,cnn.ConnectionString)
' 定义数据集
Dim ds As New DataSet
dscmd.Fill(ds)
‘添加字段信息到Excel表的第一行
xlWorkSheet.Cells(1,1).Value = "First Name"
xlWorkSheet.Cells(1,2).Value = "Last Name"
xlWorkSheet.Cells(1,3).Value = "Full Name"
xlWorkSheet.Cells(1,4).Value = "Salary"
' 将数据导入到excel
For i = 0 To ds.Tables(0).Rows.Count - 1
'Column
For j = 0 To ds.Tables(0).Columns.Count - 1
' this i change to header line cells >>>
xlWorkSheet.Cells(i + 3,j + 1) = _
ds.Tables(0).Rows(i).Item(j)
Next
Next
'HardCode in Excel sheet
' this i change to footer line cells >>>
xlWorkSheet.Cells(i + 3,7) = "Total"
xlWorkSheet.Cells.Item(i + 3,8) = "=SUM(H2:H18)"
' 保存到Excel
xlWorkSheet.SaveAs("D:vbexcel.xlsx")
xlWorkBook.Close()
xlApp.Quit()
releaSEObject(xlApp)
releaSEObject(xlWorkBook)
releaSEObject(xlWorkSheet)
'弹出对话框显示保存后的路径
MsgBox("You can find the file D:vbexcel.xlsx")
Catch ex As Exception
End Try
End Sub
' Function of Realease Object in Excel Sheet
Private Sub releaSEObject(ByVal obj As Object)
Try
System.Runtime.InteropServices.Marshal.ReleaseComObject(obj)
obj = Nothing
Catch ex As Exception
obj = Nothing
Finally
GC.Collect()
End Try
End Sub
End Class
