. 从Excell文件读取数据时更改为

我使用以下代码将Excel数据读取到数据表中,但是数据表中的列名p.o.box已更改为p o box。有人能解释一下为什么会发生这种情况吗?

Dim FileName As String = "C:\abc.xls"
    Dim conn As Data.OleDb.OleDbConnection = Nothing
    Dim dt As New DataTable

    Try
        Try
            Try
                conn = New Data.OleDb.OleDbConnection(String.Format("Provider=Microsoft.Jet.OLEDB.4.0;Data Source={0};Extended Properties=Excel 8.0;", FileName))
                conn.Open()
            Catch exOleDB As System.Data.OleDb.OleDbException
                If exOleDB.ErrorCode <> -2147467259 Then Throw exOleDB
                'try to open an Excel 2007 file
                conn = New Data.OleDb.OleDbConnection(String.Format("Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Extended Properties=Excel 12.0;", FileName))
                conn.Open()
            End Try
        Catch ex As Exception
            Throw New Exception("Can't read the import file. Try saving the file as an Excel 97-2003 Workbook (.xls). Also check the file permissions and impersonation settings.", ex)
        End Try
        Using selectedCMD As New Data.OleDb.OleDbCommand("select * from [Users$]", conn)
            Using da As New Data.OleDb.OleDbDataAdapter
                da.SelectCommand = selectedCMD
                da.Fill(dt)
            End Using
        End Using
    Finally
        If conn IsNot Nothing Then
            If conn.State <> ConnectionState.Closed Then conn.Close()
            conn.Dispose()
        End If
    End Try
    Return dt