private void FrmInStock_Load(object sender, EventArgs e) { //SqlConnection con = new SqlConnection("Server=D8JZPCQ2;Database=dbPhoneShop;User ID=sa;Password=123"); //con.Open(); ConectionString con = new ConectionString(); con.SetConnection(); //Add date to combobox try { string sql = "Select * from tbProduct Order By ProductID"; SqlCommand cmd = new SqlCommand("spRunSQL", con.con); cmd.Parameters.AddWithValue("@sql", sql); cmd.CommandType = CommandType.StoredProcedure; SqlDataReader dr = cmd.ExecuteReader(); DataTable tb = new DataTable(); tb.Load(dr); dgvProduct.DataSource = tb; // con.Close(); } catch (Exception ex) { MessageBox.Show(ex.Message); } }