Question

So I have the following connection string which is causing me issues. I am attempting to write an application which is capable of being database agnostic (difficult but not impossible) and I have come to testing it on PostgreSQL however I cannot seem to get an OLE connection to work with it. From what I have seen it is entirely possible.

I got everything working using a specific class for PostgreSQL but this used the Npgsql types rather than generic OLE types.

E.g.
private NpgsqlCommand m_postgreSQLDatabaseCommand;

Instead of
private OleDbCommand m_oleDatabaseCommand;

This is not acceptable in my circumstances.

I tried simply changing the connection string to use the Npgsql provider but I am not sure if I am using it correctly. I get the error below:

Connection String:

<add name="ApplicationPostgresDefault" 
    connectionString="Server=127.0.0.1;Port=5432;
    Database=myDatabase;
    User Id=myUser;
    Password=myPass; 
    Provider=Npgsql"
/>

Error:

The 'Npgsql' provider is not registered on the local machine.

What can be done to solve this?

If I get the provider in there correctly will I be able to communicate with PostgreSQL as I was with Npgsql objects?

Answer 1

The local machine doesn’t have the provider installed.

I would suggest using a native client rather than OleDb anyway:

http://npgsql.projects.postgresql.org/

http://connectionstrings.com/Providers/npgsql

that’s your choose