不好意思 现在才看到；Private Sub 导出EXCEL_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
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Dim xlApp, xlBook, xlSheet As Object
xlapp = CreateObject("Excel.Application")
xlbook = xlapp.Workbooks.Add
xlsheet = xlbook.Worksheets(1)
'Dim xlapp As New Excel.Application
'Dim xlbook As Excel.Workbook
'Dim xlsheet As Excel.Worksheet
Dim rowindex, colindex As Integer rowindex = 1 '行
colindex = 0 '列
'xlbook = xlapp.Workbooks.Open("c:\EXCEL.xls") '打开EXCEL文件
xlsheet = xlapp.Worksheets("sheet1") '打开sheet1那页 Dim a As New DataSet
Dim table As New System.Data.DataTable table = DataSet11.Tables("INVMATLISTA") '填充表 Dim row As DataRow '定义row为表格的行
Dim col As DataColumn '定义col为表格的列 '把表格的每一列写到EXCEL去
For Each col In table.Columns
colindex = colindex + 1
xlapp.Cells(1, colindex) = col.ColumnName Next
'把表格的每一行写到EXCEL去
For Each row In table.Rows
rowindex = rowindex + 1
colindex = 0
For Each col In table.Columns
colindex = colindex + 1
xlapp.Cells(rowindex, colindex) = row(col.ColumnName)
Next
Next
xlapp.Visible = True
End Sub 前提要先引用一个Microsoft.Office.Interop.Excel.dll然后在最上面先输入Imports Microsoft.Office.Interop； 就可以了
利用DataWindow.net在 vb.net 下导出PDF格式文件
利用datawindow.net，导出PDF文件，实现前提：
1.安装Acrobat Distiller虚拟打印机,注意要用datawindow.net提供的打印驱动，在c:\program files\sybase\datawindow.net2.0\driver中,在文章最后，我会提供一个静态安装虚拟打印机的批处理文件，方便安装。
2.安装Ghostscript 7.05 ，在网上找,免费的。
3.导出PDF文件前，一要指定虚拟打印机名，其次导出格式为PDF（Export.PDF.Method=Distill!）,另外还要指定 PDF.Distill.CustomPostScript=Yes。
具体代码如下：
''' summary
''' 导出文件
''' /summary
''' param name="sender"/param
''' param name="e"/param
''' remarks/remarks
Private Sub btnExport_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnExport.Click
Try
Dim strFilename, strPrinter As String
Dim saveDg As New SaveFileDialog
strPrinter = Me.dwPrint.Describe("DataWindow.Print.PrinterName")
saveDg.FileName = Me.dwPrint.Tag.ToString
saveDg.Filter = "Pdf文件|*.pdf|Excel文件|*.xls|所有文件|*.*"
If saveDg.ShowDialog = Windows.Forms.DialogResult.OK Then
strFilename = saveDg.FileName
If strFilename.IndexOf(".pdf") 0 Then
Me.dwPrint.Modify("DataWindow.Print.PrinterName='Acrobat Distiller'")
Me.dwPrint.Modify("DataWindow.Export.PDF.Method=Distill!")
Me.dwPrint.Modify("DataWindow.Export.PDF.Distill.CustomPostScript=Yes")
Me.dwPrint.SaveAs(strFilename, Sybase.DataWindow.FileSaveAsType.Pdf, True)
ElseIf strFilename.IndexOf(".xls") 0 Then
Me.dwPrint.SaveAs(strFilename, Sybase.DataWindow.FileSaveAsType.Excel, True)
End If
Me.dwPrint.Modify("DataWindow.Print.PrinterName='" + strPrinter + "'")
MessageBox.Show("导出成功!", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information)
End If
Catch ex As Exception
MessageBox.Show(ex.Message, "提示", MessageBoxButtons.OK, MessageBoxIcon.Error)
End Try
End Sub
4 批处理文件（实现静默安装）
刚好写了个Helper类，你试验一下DataTable2Exce(这个方法代码如下：
Imports System.IO
Imports System.Data
Imports System.Data.OleDb
Public MustInherit Class ExcelHelper
Private Shared Function buildConnStr(excelFilePath As String) As String
Dim excelFileInfo As New System.IO.FileInfo(excelFilePath)
Dim constr As String
If excelFileInfo.Extension = ".xlsx" Then
constr = String.Format("Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Extended Properties='Excel 12.0 Xml;HDR=YES;IMEX=1'", excelFilePath)
Else
constr = String.Format("Provider=Microsoft.Jet.OLEDB.4.0;Data Source={0};Extended Properties='Excel 8.0;HDR=Yes;IMEX=1'", excelFilePath)
End If
Return constr
End Function
'将datatable导入到excel
Public Shared Function DataTable2Excel(dt As DataTable, excelFilePath As String) As Boolean
If File.Exists(excelFilePath) Then
Throw New Exception("该文件已经存在！")
End If
If dt.TableName.Trim.Length = 0 Or dt.TableName.ToLower = "table" Then
dt.TableName = "Sheet1"
End If
Dim colCount As Integer = dt.Columns.Count
Dim pa(colCount - 1) As OleDb.OleDbParameter
Dim tableStructStr As String = "Create Table " dt.TableName "("
Dim connString As String = buildConnStr(excelFilePath)
Dim objconn As New OleDbConnection(connString)
Dim objcmd As New OleDbCommand
objcmd.Connection = objconn
Dim dataTypeList As New ArrayList
dataTypeList.Add("System.Decimal")
dataTypeList.Add("System.Double")
dataTypeList.Add("System.Int16")
dataTypeList.Add("System.Int32")
dataTypeList.Add("System.Int64")
dataTypeList.Add("System.Single")
Dim i As Integer = 0
For Each col As DataColumn In dt.Columns
If dataTypeList.IndexOf(col.GetType.ToString) 0 Then
pa(i) = New OleDbParameter("@" col.ColumnName, OleDbType.Double)
objcmd.Parameters.Add(pa(i))
If i + 1 = colCount Then
tableStructStr += col.ColumnName + " double)"
Else
tableStructStr += col.ColumnName + " double,"
End If
Else
pa(i) = New OleDbParameter("@" col.ColumnName, OleDbType.VarChar)
objcmd.Parameters.Add(pa(i))
If i + 1 = colCount Then
tableStructStr += col.ColumnName + " VarChar)"
Else
tableStructStr += col.ColumnName + " VarChar,"
End If
End If
i += 1
Next
Try
objcmd.CommandText = tableStructStr
If objconn.State = ConnectionState.Closed Then objconn.Open()
objcmd.ExecuteNonQuery()
Catch ex As Exception
Throw ex
End Try
Dim InsertSql_1 As String = "Insert into " + dt.TableName + " ("
Dim InsertSql_2 As String = " Values ("
Dim InsertSql As String = ""
For colID As Integer = 0 To colCount - 1 Step 1
If colID + 1 = colCount Then
InsertSql_1 += dt.Columns(colID).ColumnName ")"
InsertSql_2 += "@" + dt.Columns(colID).ColumnName + ")"
Else
InsertSql_1 += dt.Columns(colID).ColumnName + ","
InsertSql_2 += "@" + dt.Columns(colID).ColumnName + ","
End If
Next
InsertSql = InsertSql_1 + InsertSql_2
For rowID As Integer = 0 To dt.Rows.Count - 1 Step 1
For colID = 0 To dt.Columns.Count - 1
If pa(colID).DbType = DbType.Double And dt.Rows(rowID)(colID).ToString.Trim = "" Then
pa(colID).Value = 0
Else
pa(colID).Value = dt.Rows(rowID)(colID).ToString.Trim
End If
Next
Try
objcmd.CommandText = InsertSql
objcmd.ExecuteNonQuery()
Catch ex As Exception
Throw ex
End Try
Next
Try
If objconn.State = ConnectionState.Open Then objconn.Close()
Catch exp As Exception
Throw exp
End Try
Return True
End Function
' 获取Excel文件数据表列表Sheets
Public Shared Function GetExcelTables(ExcelFileName As String) As ArrayList
'Dim sheets As New List(Of String)
'conn.Open()
'Dim dt As DataTable = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, Nothing)
'For Each r In dt.Rows
' sheets.Add(r("TABLE_NAME"))
'Next
'conn.Close()
'Return sheets
Dim dt As DataTable
If Not File.Exists(ExcelFileName) Then
Throw New Exception("指定的Excel文件不存在")
Return Nothing
End If
Dim tableList As New ArrayList
Using conn As OleDbConnection = New OleDbConnection(buildConnStr(ExcelFileName))
Try
conn.Open()
dt = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, New Object() {Nothing, Nothing, Nothing, "TABLE"})
Catch ex As Exception
Throw ex
End Try
For i As Integer = 0 To dt.Rows.Count - 1
Dim tableName As String = dt.Rows(i)(2).ToString.Trim.TrimEnd("$")
If tableList.IndexOf(tableName) 0 Then tableList.Add(tableName)
Next
End Using
Return tableList
End Function
'将Excel文件导出至DataTable(第一行作为表头)
Public Shared Function InputFromExcel(ExcelFileName As String, TableName As String) As DataTable
If Not File.Exists(ExcelFileName) Then
Throw New Exception("指定的Excel文件不存在")
End If
Dim tableList As ArrayList = GetExcelTables(ExcelFileName)
If tableList.IndexOf(TableName) 0 Then
TableName = tableList(0).ToString.Trim
End If
Dim dt As New DataTable
Dim conn As New OleDbConnection(buildConnStr(ExcelFileName))
Dim cmd As New OleDbCommand("select * from [" TableName "$]", conn) '调试是否需要$
Dim adapter As New OleDbDataAdapter(cmd)
Try
If conn.State = ConnectionState.Closed Then conn.Open()
adapter.Fill(dt)
Catch ex As Exception
Throw ex
Finally
If conn.State = ConnectionState.Open Then conn.Close()
End Try
Return dt
End Function
'查询excel文件中的一个数据
Public Shared Function ReadOneDataFromExcel(ExcelFileName As String, TableName As String, sql As String) As Object
If Not File.Exists(ExcelFileName) Then
Throw New Exception("指定的Excel文件不存在")
End If
Dim tableList As ArrayList = GetExcelTables(ExcelFileName)
If tableList.IndexOf(TableName) 0 Then
TableName = tableList(0).ToString.Trim
End If
Dim dt As New DataTable
Dim conn As New OleDbConnection(buildConnStr(ExcelFileName))
Dim cmd As New OleDbCommand(sql, conn) '调试是否需要$
Dim ret As Object
Try
If conn.State = ConnectionState.Closed Then conn.Open()
ret = cmd.ExecuteScalar()
Catch ex As Exception
Throw ex
Finally
If conn.State = ConnectionState.Open Then conn.Close()
End Try
Return ret
End Function
'获取Excel文件指定数据表的数据列表columnNames
Public Shared Function GetExcelTableColumns(ExcelFileName As String, TableName As String) As ArrayList
Dim dt As DataTable
If Not File.Exists(ExcelFileName) Then
Throw New Exception("指定的Excel文件不存在")
Return Nothing
End If
Dim ColList As New ArrayList
Using conn As OleDbConnection = New OleDbConnection(buildConnStr(ExcelFileName))
Try
conn.Open()
dt = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Columns, New Object() {Nothing, Nothing, TableName, Nothing})
Catch ex As Exception
Throw ex
End Try
For i As Integer = 0 To dt.Rows.Count - 1
Dim ColName = dt.Rows(i)("Column_Name").ToString().Trim()
ColList.Add(ColName)
Next
End Using
Return ColList
End Function
End Class
用System.IO.StreamReader类可以读各类文本文件，用System.IO.StreamWriter 类则可以写各类文本文件，从而实现导入导出文本文件功能。这两个类均支持各类编码格式（默认的是Unicode和UTF-8）。