public AddItem() { InitializeComponent(); SQLiteCommand cmmnd = new SQLiteCommand(@"Select * from Products;", Program.database_connection); SQLiteDataReader read = cmmnd.ExecuteReader(); while (read.Read()) { this.dataGridView1.Rows.Add(read["id"].ToString(), read["name"].ToString(), read["price"].ToString(), read["stock"].ToString()); } ProductID.Focus(); }