How to tell if sqlite database file is valid or not

Question

In the code below, pathToNonDatabase is the path to a simple text file, not a real sqlite database. I was hoping for sqlite3_open to detect that, but

Answer 1

For anyone needing to do this in C# with System.Data.SQLite you can start a transaction, and then immediately roll it back as follows:-

    private bool DatabaseIsValid(string filename)
    {
        using (SQLiteConnection db = new SQLiteConnection(@"Data Source=" + filename + ";FailIfMissing=True;"))
        {
            try
            {
                db.Open();
                using (var transaction = db.BeginTransaction())
                {
                    transaction.Rollback();
                }
            }
            catch (Exception ex)
            {
                log.Debug(ex.Message, ex);
                return false;
            }
        }
        return true;
    }

If the file is not a valid database the following SQLiteException is thrown - file is encrypted or is not a database (System.Data.SQLite.SQLiteErrorCode.NotADb). If you aren't using encrypted databases then this solution should be sufficient. (Only the 'db.Open()' was required for version 1.0.81.0 of System.Data.SQLite but when I upgraded to version 1.0.91.0 I had to insert the inner using block to get it to work).