PostgreSQL Native Provider
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The PGNP provider is a thin layer between Microsoft ADO and PostgreSQL database. It implements most of the OLEDB interfaces and uses libpq to access a PostgreSQL database. The provider can be used from 32-bit and 64-bit applications both native and.NET.
From Igor P. Zenkov & Software Engineering :What do you need to know about free software?
I'm in need of a functional OleDB data provider for PostgreSQL. It should be similar to the ODBC provider for MySQL. See http://dev.mysql.com/downloads/connector/odbc/5.1.html
3 Answers
The postgres software catalog has some providers on there. Motherboard manuals model number cmd.
dotConnect for PostgreSQL (from Devart) offers a pretty good one. It is fast and works. The free version will give you your basic ADO.net support, the pay offers everything else. ODBC doesn't have a free version.
http://www.devart.com/dotconnect/postgresql/
edit
Adding the direct link to the ODBC connector as it is on a separate page.
https://www.devart.com/odbc/postgresql/
If you want to check the last version of ODBC for PosgreSQL :http://www.postgresql.org/ftp/odbc/versions/
Enter in the 'msi' folder for the installer.But be careful, when you are using ODBC, there is a 32bits and a 64bits version. So choose the right one.