Access Database with ADO.NET

Again I see people struggle to connect to Access database in forum so here is one solution.

This short article extract the key part of to show you how to connect to MS Access database.

The 2 important things to watch out if you want to access to access to MS Access database.

1. You need to have Microsoft.Jet.Oledb.4.0 or newer in your machine (you will have it if you have Visual Studio 2008 or newer in your machine by right).

2. If you are running it as Web Application you might need to set the application pool to Enable 32-bit

The key part of the code is

private void ReadRecords()


       OleDbConnection conn = null;

       OleDbDataReader reader = null;



              conn = new OleDbConnection(

                     @”Provider=Microsoft.Jet.OLEDB.4.0; “ +

                     @”Data Source=” + Server.MapPath(“Pets/Pets.mdb”));



              OleDbCommand cmd =

                     new OleDbCommand(“Select * FROM PetTable”, conn);

              reader = cmd.ExecuteReader();


              datagrid.DataSource = reader;





              if (reader != null)  reader.Close();

              if (conn != null)  conn.Close();



You can also download a single solution from The sample file name is ADONETAccessDB.exe. My MSN ID is


About chanmingman

Since March 2011 Microsoft Live Spaces migrated to Wordpress ( till now, I have is over 1 million viewers. This blog is about more than 50% telling you how to resolve error messages, especial for Microsoft products. The blog also has a lot of guidance teaching you how to get stated certain Microsoft technologies. The blog also uses as a help to keep my memory. The blog is never meant to give people consulting services or silver bullet solutions. It is a contribution to the community. Thanks for your support over the years. Ming Man is Microsoft MVP since year 2006. He is a software development manager for a multinational company. With 25 years of experience in the IT field, he has developed system using Clipper, COBOL, VB5, VB6, VB.NET, Java and C #. He has been using Visual Studio (.NET) since the Beta back in year 2000. He and the team have developed many projects using .NET platform such as SCM, and HR based applications. He is familiar with the N-Tier design of business application and is also an expert with database experience in MS SQL, Oracle and AS 400.
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