VB.net读取Excel文件内容

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Imports System.Data.OleDb
Public Class Form1
   Private _FilePath As String = ""
   Private _DS As DataSet
   Private Const _Connectstring = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=<FilePath>;Extended Properties=""Excel 8.0"""
   Private Const _SelectData = "Select * from [<TableName>$]"
   Private Sub TSBSelectFile_Click(ByVal sender As System.Object,ByVal e As System.EventArgs) Handles TSBSelectFile.Click
      Me.OFDExcel.FileName = _FilePath
      If Not Me.OFDExcel.ShowDialog(Me) = vbOK Then
         Exit Sub
      End If
      _FilePath = Me.OFDExcel.FileName
      Me.TSLFilePath.Text = _FilePath
      Try
         Using cn As OleDb.OleDbConnection = New OleDbConnection(_Connectstring.Replace("<FilePath>",_FilePath))
            cn.Open()
            _DS = New DataSet
            Dim tb As DataTable = cn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables,Nothing)
            Me.TSCBOSheetList.Items.Clear()
            For Each r As DataRow In tb.Rows
               If r("TABLE_TYPE") = "TABLE" Then
                  Me.TSCBOSheetList.Items.Add(r("TABLE_NAME").ToString.Replace("$",""))
               End If
            Next
            If Me.TSCBOSheetList.Items.Count > 0 Then
               Me.TSCBOSheetList.SelectedIndex = 0
            End If
         End Using
      Catch ex As Exception
         MsgBox(ex.Message)
      End Try
   End Sub

   Private Sub TSCBOSheetList_SelectedIndexChanged(ByVal sender As Object,ByVal e As System.EventArgs) Handles TSCBOSheetList.SelectedIndexChanged
      Try
         Dim TBName As String = Me.TSCBOSheetList.SelectedItem.ToString
         If _DS.Tables.Contains(TBName) Then
            Me.DataGridView1.DataSource = _DS.Tables(TBName)
            Exit Sub
         End If
         Using cn As OleDb.OleDbConnection = New OleDbConnection(_Connectstring.Replace("<FilePath>",_FilePath))
            cn.Open()
            Dim sql As String = _SelectData.Replace("<TableName>",TBName)
            Using ad As OleDbDataAdapter = New OleDbDataAdapter(sql,cn)
               ad.Fill(_DS,TBName)
               Me.DataGridView1.DataSource = _DS.Tables(TBName)
            End Using
         End Using
      Catch ex As Exception
         MsgBox(ex.Message)
      End Try
   End Sub
End Class

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