title: How to read more than 256 columns from an excel file (2007 format) using OLEDB
body: <p>I'm trying to import a excel file with more than 256 columns using OLEDB in C#. I tried all kinds of things, but it doesn't seem to be possible to read more than 256 columns from a excel (2007 format) file. I'm wondering if it's a bug or I'm simply missing something. Here is the connection string I used:</p>
  
  <p>Provider=Microsoft.ACE.OLEDB.12.0;Data Source=c:\myFolder\myExcel2007file.xlsx;Extended Properties="Excel 12.0</p>