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[交流] VB.net将Excel导入到Access但datagridview上不能显示更新后的数据？

Private Sub 数据导入ToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles 数据导入ToolStripMenuItem.Click
      Dim dresult As DialogResult = Me.openFileDialog1.ShowDialog()
      If dresult = System.Windows.Forms.DialogResult.OK Then
         Dim filepath As String = openFileDialog1.FileName
         If filepath = "" Then
            MessageBox.Show("请选择要导入的Excel文档！", "系统提示", MessageBoxButtons.OK, MessageBoxIcon.Information)
            Return
         Else
            Dim ds As New DataSet()
            '取得数据集
            '调用下面的函数
            ds = xsldata(filepath)
            'dataGridView2.DataSource = ds.Tables[0];
            Dim errorcount As Integer = 0 '记录错误信息条数
            Dim updatecount As Integer = 0 '更新信息条数
            Dim insertcount As Integer = 0 '记录插入成功条数
            Dim mess As String = ""
            Dim i As Integer
            For i = 0 To (ds.Tables(0).Rows.Count) - 1
                  Dim mc As String = ds.Tables(0).Rows(i).Item(0).ToString  '读取每一行的第一列数据
                  Dim kbc As Double = CType(ds.Tables(0).Rows(i).Item(1), Double)
                  Dim hsc As Double = CType(ds.Tables(0).Rows(i).Item(2), Double)
                  Dim shtc As Double = CType(ds.Tables(0).Rows(i).Item(3), Double)
                  Dim ysc As Double = CType(ds.Tables(0).Rows(i).Item(4), Double)
                  Dim djc As Double = CType(ds.Tables(0).Rows(i).Item(5), Double)
                  Dim stc As Double = CType(ds.Tables(0).Rows(i).Item(6), Double)
                  Dim dzc As Double = CType(ds.Tables(0).Rows(i).Item(7), Double)
                  Dim hhc As Double = CType(ds.Tables(0).Rows(i).Item(8), Double)
                  Dim dhc As Double = CType(ds.Tables(0).Rows(i).Item(9), Double)
                  Dim zjc As Double = CType(ds.Tables(0).Rows(i).Item(10), Double)
                  Dim yx As Double = CType(ds.Tables(0).Rows(i).Item(11), Double)
                  Dim bgzl As Double = CType(ds.Tables(0).Rows(i).Item(12), Double)
                  Dim gjzs As Double = CType(ds.Tables(0).Rows(i).Item(13), Double)
                  Dim kxb As Double = CType(ds.Tables(0).Rows(i).Item(14).ToString, Double)
                  Dim yxzs As Double = CType(ds.Tables(0).Rows(i).Item(15).ToString, Double)

                  Dim Str As String = "insert into zuankong(名称,空白层,含水层,砂土层,岩石层,堆积层,死土层,地质层,火化层,地核层,中间层,岩性,比贯入阻力,标贯击数,孔隙比,液性指数) Values ('" + mc + "','" & Trim(kbc) & "','" & Trim(hsc) & "','" & Trim(shtc) & "','" & Trim(ysc) & "','" & Trim(djc) & "','" & Trim(stc) & "','" & Trim(dzc) & "','" & Trim(hhc) & "','" & Trim(dhc) & "','" & Trim(zjc) & "','" & Trim(yx) & "','" & Trim(bgzl) & "','" & Trim(gjzs) & "','" & Trim(kxb) & "','" & Trim(yxzs) & "') "
            Dim conn As OleDb.OleDbConnection = New OleDb.OleDbConnection
                  conn.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;" & "Data Source=" & System.Windows.Forms.Application.StartupPath & "\zkshujuku.mdb;"
                  Dim cmd As OleDb.OleDbCommand = New OleDb.OleDbCommand
                  conn.Open() '打开连接
                  cmd.Connection = conn
                  Dim da As OleDb.OleDbDataAdapter = New OleDb.OleDbDataAdapter(Str, conn)
                  da.Fill(ZkshujukuDataSet, "zuankong"

                  DataGridView1.DataSource = ZkshujukuDataSet.Tables(0) '更换datagridview1的数据源
                  DataGridView1.Refresh()
            Next
               End If
      End If
End Sub

Private Function xsldata(ByVal filepath As String) As DataSet

      Dim strCon As String = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + filepath + ";Extended Properties='Excel 8.0;IMEX=1'"

      Dim Conn As New System.Data.OleDb.OleDbConnection(strCon)

      Dim strCom As String = "SELECT * FROM [Sheet1$]"

      Conn.Open()

      Dim myCommand As New System.Data.OleDb.OleDbDataAdapter(strCom, Conn)

      Dim ds As New DataSet()

      myCommand.Fill(ds, "[Sheet1$]"

Conn.Close()

Return ds
End Function 'xsldata
上面可以实现Excel导入到Access功能，但是在DataGridView控件上不能显示更新后的数据还是更新前的？菜鸟刚接触这个，不是很懂，希望高手指点迷津！

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