private void metroTile3_Click(object sender, EventArgs e)//查询订单操作 { string selectStatement = "select * from orderlist where " + "user_id = \"" + userId + "\""; MySqlCommand com = new MySqlCommand(selectStatement, Login.con); com.ExecuteNonQuery(); MySqlDataReader dataReader = com.ExecuteReader(); //many. order_lists = null; if (dataReader.HasRows) { while (dataReader.Read() && dataReader.GetString(0) != null) { if (order_lists == null) { order_lists = new List <string>(); } // order_id order_lists.Add(dataReader.GetString(0)); } } dataReader.Close(); if (order_lists == null || order_lists.Count == 0) { MetroFramework.MetroMessageBox.Show(this, "您当前还没有下过单哦!", "订单", MessageBoxButtons.OK, MessageBoxIcon.Error); } else { QueryOrder order = new QueryOrder(order_lists); order.Show(); } }
private void metroTile3_Click(object sender, EventArgs e)//查询订单操作 { string selectStatement = "select * from orderlist where " + "user_id = \"" + userId + "\""; MySqlCommand com = new MySqlCommand(selectStatement, Login.con); com.ExecuteNonQuery(); MySqlDataReader dataReader = com.ExecuteReader(); //many. order_lists = null; if (dataReader.HasRows) { while (dataReader.Read() && dataReader.GetString(0) != null) { if (order_lists == null) { order_lists = new List<string>(); } // order_id order_lists.Add(dataReader.GetString(0)); } } dataReader.Close(); if (order_lists == null || order_lists.Count==0 ) MetroFramework.MetroMessageBox.Show(this, "您当前还没有下过单哦!", "订单", MessageBoxButtons.OK, MessageBoxIcon.Error); else { QueryOrder order = new QueryOrder(order_lists); order.Show(); } }