sqlite и datagridview

public MainDb(string dbFileName)
        {
            try
            {
                this.dbFileName = dbFileName;
                this.status = true;
                if (!File.Exists(this.dbFileName))
                {
                    SQLiteConnection.CreateFile(this.dbFileName);
                    this.status = false;
                }
                this.sqlFactory = (SQLiteFactory)DbProviderFactories.GetFactory("System.Data.SQLite");
                this.connection = (SQLiteConnection)this.sqlFactory.CreateConnection();
                this.connection.ConnectionString = "Data Source = " + dbFileName;
                this.connection.Open();
                if (!status)
                    this.CreateTable();
            }

public SQLiteDataReader Query(string query)
        {
            SQLiteCommand command = new SQLiteCommand(this.connection);
            command.CommandText = query;
            command.CommandType = CommandType.Text;
            SQLiteDataReader reader = command.ExecuteReader();
            return reader;
        }

private void Form1_Load(object sender, EventArgs e)
        {
            cemu.MainDb db = new cemu.MainDb("Data\\kart.db");
            string query = "SELECT * FROM `nomenklatura`";
            reader = db.Query(query);

SQLiteConnection cnn = new SQLiteConnection("Data Source=c:\\log.db");
        SQLiteCommand cmd = new SQLiteCommand("SELECT * FROM evtlog", cnn);
        cnn.Open();
        SQLiteDataReader dr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
        DataTable dt = new DataTable();
        dt.Load(dr);
        GridView1.DataSource = dt;
        GridView1.DataBind();

DataSet ds = new DataSet();
string sql = "SELECT * FROM FOO";
try
{
using (SQLiteConnection conn = new SQLiteConnection(connstr))
{
using (SQLiteDataAdapter da = new SQLiteDataAdapter(sql, conn))
{
da.Fill(ds);
dataGridView1.DataSource = ds.Tables[0].DefaultView;
}
}
}
catch (Exception err)
{
}
}