Question

I have already managed to connect to the database, but I used the following code to connect.

static void Main(string[] args)
{
    using (NpgsqlConnection conn= new NpgsqlConnection(
        "Host=xxx.xx.xx.xxx;Port=5432;User Id=Admin;Password=postgres.1;Database=Test1;")) 
    {
        conn.Open();

        NpgsqlCommand cmd = new NpgsqlCommand("SELECT * FROM TABLE1", conn);

        try
        {
            NpgsqlDataReader dr = cmd.ExecuteReader();
            while (dr.Read())
            {
                for (int i = 0; i < dr.FieldCount; i++)
                {
                    Console.Write("{0} \t", dr[i]);
                }
                Console.WriteLine();
            }
            dr.Close();
        }
        finally
        {
            conn.Close();
        }
    }

    Console.ReadLine();
}

Apparently I have to somehow generate classes for the tables in the database and use those to connect instead of using NpgsqlCommand cmd = new NpgsqlCommand("SELECT * FROM TABLE1", conn);. Already tried using DbLinq’s DbMetal, but I get the error message :

DbMetal : Server has closed connection.

I’ve been researching this, but I haven’t found anything useful.

Please help if you can. It’s kinda urgent.

Thanks in advance.

Answer 1

I think you need a NpgsqlDataAdapter and a DataSet

            DataSet ds = new DataSet();
            NpgsqlDataAdapter da = new NpgsqlDataAdapter(); 
            da.SelectCommand = cmd;
            da.Fill(ds);
            return ds;

Now your DataSet contains a table (ds.Tables[0]) and that table all the rows selected

            foreach(DataRow r in ds.Tables[0].Rows)
                 Console.WriteLine(r["ColumnName"].ToString());