Question

我有一个文本框，我希望用户输入他们的woeid号码，但是我不确定如何将其添加到查询字符串中，在下面的代码中，我可以获得洛杉矶的天气，但是我现在想要的是通过使用用户提供的woeid号来获取它。

        try
        {

            String query = String.Format("https://query.yahooapis.com/v1/public/yql?q=select * from weather.forecast where woeid in (select woeid from geo.places(1) where text='Los Angeles')&format=xml&env=store%3A%2F%2Fdatatables.org%2Falltableswithkeys");
            var wData = new XmlDocument();
            wData.Load(query);

            var man = new XmlNamespaceManager(wData.NameTable);
            man.AddNamespace("yweather", "http://xml.weather.yahoo.com/ns/rss/1.0");

            XmlNode channel = wData.SelectSingleNode("query").SelectSingleNode("results").SelectSingleNode("channel");
            XmlNodeList nodes = wData.SelectNodes("query/results/channel");

            MainForm.WindSpeed = channel.SelectSingleNode("yweather:wind", man).Attributes["speed"].Value;

            MainForm.Town = channel.SelectSingleNode("yweather:location", man).Attributes["city"].Value;

            MainForm.Temperature = channel.SelectSingleNode("item").SelectSingleNode("yweather:condition", man).Attributes["temp"].Value;

            MainForm.Condition = channel.SelectSingleNode("item").SelectSingleNode("yweather:condition", man).Attributes["text"].Value;

            MainForm.Humidity = channel.SelectSingleNode("yweather:atmosphere", man).Attributes["humidity"].Value;

            MainForm.TFCond = channel.SelectSingleNode("item").SelectSingleNode("yweather:forecast", man).Attributes["text"].Value;

            MainForm.TFHigh = channel.SelectSingleNode("item").SelectSingleNode("yweather:forecast", man).Attributes["high"].Value;

            MainForm.TFLow = channel.SelectSingleNode("item").SelectSingleNode("yweather:forecast", man).Attributes["low"].Value;              
        }
        catch {}
    }

Answer 1

尝试xml linq：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml;
using System.Xml.Linq;

namespace ConsoleApplication1
{
    class Program
    {

        static void Main(string[] args)
        {            
            string city = "Los Angeles";
            string query = String.Format("https://query.yahooapis.com/v1/public/yql?q=select * from weather.forecast where woeid in (select woeid from geo.places(1) where text='{0}')&format=xml&env=store%3A%2F%2Fdatatables.org%2Falltableswithkeys", city);

            XDocument wData = XDocument.Load(query);
            XNamespace ns = wData.Root.GetDefaultNamespace();

            XElement xWind = wData.Descendants().Where(x => x.Name.LocalName == "wind").FirstOrDefault();
            int speed = (int)xWind.Attribute("speed");
            XElement xLocation = wData.Descendants().Where(x => x.Name.LocalName == "location").FirstOrDefault();
            string town = (string)xLocation.Attribute("city");

            XElement xCondition = wData.Descendants().Where(x => x.Name.LocalName == "condition").FirstOrDefault();
            int temp = (int)xCondition.Attribute("temp");

            XElement xAtmosphere = wData.Descendants().Where(x => x.Name.LocalName == "atmosphere").FirstOrDefault();
            int humidity = (int)xAtmosphere.Attribute("humidity");

            List<XElement> xForecast = wData.Descendants().Where(x => x.Name.LocalName == "forecast").ToList(); ;
            string tfCond = (string)xForecast.FirstOrDefault().Attribute("text");
            int high = (int)xForecast.FirstOrDefault().Attribute("high");
            int low = (int)xForecast.FirstOrDefault().Attribute("low");


       }


    }


}

Answer 2

添加行

var woeid = Request.QueryString["woeid"];

然后将其包含在现有查询中，如下所示：

String query = String.Format("https://query.yahooapis.com/v1/public/yql?q=select * from weather.forecast where woeid = '{0}'&format=xml&env=store%3A%2F%2Fdatatables.org%2Falltableswithkeys", woeid);

Answer 3

我喜欢下面的解决方案，该解决方案可以处理多个同名城市

import UIKit

struct HeadLine {
  var date: Date
  var title: String
  var text: String
  var image: String
}

struct TableSection<SectionItem: Comparable&Hashable, RowItem>: Comparable {
  var sectionItem: SectionItem
  var rowItems: [RowItem]

  static func < (lhs: TableSection, rhs: TableSection) -> Bool {
    return lhs.sectionItem > rhs.sectionItem
  }


  static func == (lhs: TableSection, rhs: TableSection) -> Bool {
    return lhs.sectionItem == rhs.sectionItem
  }

  static func group(rowItems : [RowItem], by criteria : (RowItem) -> SectionItem ) -> [TableSection<SectionItem, RowItem>] {
    let groups = Dictionary(grouping: rowItems, by: criteria)
    return groups.map(TableSection.init(sectionItem:rowItems:)).sorted()
  }
}

fileprivate func parseDate(_ str: String) -> Date {
  let dateFormat = DateFormatter()
  dateFormat.dateFormat = "yyyy-MM-dd"
  return dateFormat.date(from: str)!
}

fileprivate func firstDayOfMonth(date: Date) -> Date {
  let calendar = Calendar.current
  let components = calendar.dateComponents([.year, .month, .day], from: date)
  return calendar.date(from: components)!
}

class testSectionViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {


@IBOutlet weak var testTableView: UITableView!

var headlines = [HeadLine]()

var sections = [TableSection<Date, HeadLine>]()

override func viewDidLoad() {
    super.viewDidLoad()
    testTableView.delegate = self
    testTableView.dataSource = self

    headlines = [
        HeadLine(date: parseDate("2018-7-21"), title: "title1", text: "aaaaaaaaaaaaaaaa", image: "weight"),
        HeadLine(date: parseDate("2018-5-22"), title: "title2", text: "bbbbbbbbbbbbbbbb", image: "user"),
        HeadLine(date: parseDate("2017-5-23"), title: "title3", text: "cccccccccccccccc", image: "lock"),
        HeadLine(date: parseDate("2018-5-24"), title: "title4", text: "dddddddddddddddd", image: "manager"),
        HeadLine(date: parseDate("2018-5-25"), title: "title5", text: "eeeeeeeeeeeeeeee", image: "oka"),
        HeadLine(date: parseDate("2018-5-26"), title: "title6", text: "ffffffffffffffff", image: "omura"),
    ]

    self.sections = TableSection.group(rowItems: self.headlines, by: { (headline) in
        firstDayOfMonth(date: headline.date)
    })

}

func numberOfSections(in tableView: UITableView) -> Int {
    return self.sections.count
}

func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
    let section = self.sections[section]
    let date = section.sectionItem
    let dateFormatter = DateFormatter()
    dateFormatter.dateFormat = " yyyy/MM/dd"
    return dateFormatter.string(from: date)
}

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    let section = self.sections[section]
    return section.rowItems.count
}

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "myCell", for: indexPath)
    let headline = self.headlines[indexPath.item]
    cell.textLabel?.text = headline.title
    cell.detailTextLabel?.text = headline.text
    cell.imageView?.image = UIImage(named: headline.image)

    return cell

}


}

如何使用Yahoo Yql查询使用Woeid号码收集天气信息

3 个答案: