Microsoft Interop Excel connection in .NET C# RRS feed

  • Question

  • Hi,

    I am trying to import an excel 2010 XLSM file into the database in C# MVC.NET. But I am getting the error - "External table is not in the expected format".

    I am using the ACE provider in the connecting string and also have installed the ACE EXE 64 bit. I have tried XLSX files and they didn't work either. I got the same error.

    I will be grateful if someone can help

    Connection string
    "Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Extended Properties='Excel 12.0 XML;HDR=Yes;'";



    Wednesday, January 21, 2015 8:55 AM


  • Hello,

    With your provided connection, I tested with a sample excel 2010 file, however, it could work fine. From your description, it seems that you are trying to read a xlsm file, as far as I know, for reading this kind of files, we need to enable the macros as:

    Provider=Microsoft.ACE.OLEDB.12.0;Data Source=c:\myFolder\myExcel2007file.xlsm;
    Extended Properties="Excel 12.0 Macro;HDR=YES";

    Reference from http://www.connectionstrings.com/excel-2007/


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    • Marked as answer by Fred Bao Monday, February 2, 2015 9:20 AM
    Thursday, January 22, 2015 7:45 AM