Why am I unable to query my sqlite db?

Software development query?

• Hi, I am Developing a software project in c#.net and using postgresql as database.i am fairly new to the postgres db and I am trying to connect to the DB thru c#.net code (i m using VS 2005 as IDE). I have tried all the 3 DB drivers (OLEDB,ODBC,Npgsql) but i am getting different error for each. 1) OLEDB database : i created a datasource and i do test connection it is successful but when i say OK it gives me error as Multiple OLEDB Operation generated errors Check each OLE DB status value, if available. No work was done. I tried connecting thru code but a different error was thrown as Error: System.Data.OleDb.OleDbException: FATAL: invalid command-line arguments for server process HINT: Try "postgres --help" etc. 2) ODBC driver : when i try to connect thru datasource using IDE the test connection is succedded and i can see the correct DB as well as tables etc.But i connect thru c# code it gives error ERROR [IM002] [Microsoft][ODBC Driver Manager] Data source name not found and no default driver specified. The connection string used for OLEDB is :- string str = "Provider=PostgreSQL.1;" + "Addr=127.0.0.1;" + "Database=postgres;" + "User ID=postgres;" + "Password=vinaya"; 2) Connection string for ODBC used is :- string str = "DSN = PostgreSQL35W;Server=localhost;Port=5432... Id=postgres;Password=vinaya;Database=pos... Please guide what shud i do ?? i am not able to proceed further

• Answer:

  Make sure that you have all of the applicable drivers and framework installed. If you are using VS2005 and are trying to connect to SQL Server 2008, the drivers may not be installed. Also, try to open up the database in a SQL Editor first before you try your connection. You may find that your connection string is completely wrong.