想做一个报表，从SQL抓数据，但是怎么想要到固定时间段的数据，现在抓出来的都是表中全部的数据
'References that we needImports System.Data.SqlClient
Imports System.Data
Imports
Imports Microsoft.Office.Interop.Excel
Imports Microsoft.Office.Interop
Public Class Form1
Private Sub ReleaseObject(ByVal o As Object)
Try
While (System.Runtime.InteropServices.Marshal.ReleaseComObject(o) > 0)
End While
Catch
Finally
o = Nothing
End Try
End Sub
Private Sub btnBrowse_Click_1(sender As System.Object, e As System.EventArgs) Handles btnBrowse.Click
'Initialize the objects before use
Dim dataAdapter As New SqlClient.SqlDataAdapter()
Dim dataSet As New DataSet
Dim command As New SqlClient.SqlCommand
Dim datatableMain As New System.Data.DataTable()
Dim connection As New SqlClient.SqlConnection
Dim a As Date
Dim ms As Integer
a = Now()
'Assign your connection string to connection object
connection.ConnectionString = "Server=.;Database=TEST;User Id=sa;Password=sa;"
command.Connection = connection
= CommandType.Text
'You can use any command select
= "SELECT * FROM [dbo].[TEST]"
dataAdapter.SelectCommand = command
'Dim at As Timer
'Me.Label1.Text = "Read from Data Base Time"a.Interval.ToString
Dim f As FolderBrowserDialog = New FolderBrowserDialog
Try
If f.ShowDialog() = DialogResult.OK Then
'This section help you if your language is not English.
System.Threading.Thread.CurrentThread.CurrentCulture = _
System.Globalization.CultureInfo.CreateSpecificCulture("en-US")
Dim oExcel As Excel.Application
Dim oBook As Excel.Workbook
Dim oSheet As Excel.Worksheet
oExcel = CreateObject("Excel.Application")
oBook = oExcel.Workbooks.Add(Type.Missing)
oSheet = oBook.Worksheets(1)
Dim dc As System.Data.DataColumn
Dim dr As System.Data.DataRow
Dim colIndex As Integer = 0
Dim rowIndex As Integer = 0
'Fill data to datatable
connection.Open()
dataAdapter.Fill(datatableMain)
connection.Close()
DataGridView1.DataSource = datatableMain
DataGridView1.Refresh()
'Export the Columns to excel file
For Each dc In datatableMain.Columns
colIndex = colIndex + 1
oSheet.Cells(1, colIndex) = dc.ColumnName
Next
'Export the rows to excel file
For Each dr In datatableMain.Rows
rowIndex = rowIndex + 1
colIndex = 0
For Each dc In datatableMain.Columns
colIndex = colIndex + 1
oSheet.Cells(rowIndex + 1, colIndex) = dr(dc.ColumnName)
Next
Next
'Set final path
Dim fileName As String = "\ExportedAuthors" + ".xls"
Dim finalPath = f.SelectedPath + fileName
txtPath.Text = finalPath
oSheet.Columns.AutoFit()
'Save file in final path
oBook.SaveAs(finalPath, XlFileFormat.xlWorkbookNormal, Type.Missing, _
Type.Missing, Type.Missing, Type.Missing, XlSaveAsAccessMode.xlExclusive, _
Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing)
'Release the objects
ReleaseObject(oSheet)
oBook.Close(False, Type.Missing, Type.Missing)
ReleaseObject(oBook)
oExcel.Quit()
ReleaseObject(oExcel)
'Some time Office application does not quit after automation:
'so i am calling GC.Collect method.
GC.Collect()
MessageBox.Show("Export done successfully!")
End If
Catch ex As Exception
MessageBox.Show(ex.Message, "Warning", MessageBoxButtons.OK)
End Try
End Sub
