Question

我正在使用OpenWeatherMap API，似乎无法弄清楚为什么我的一个字段显示为未定义。除了当我尝试检索天气状况（位于weather.description上）时，一切都正常，它返回的是undefined。所有其他变量都可以正确填写。任何人都知道是什么会阻止它正常工作？我的JavaScript：

namespace DocumentStore.IntegrationTests
{
public static class Constants
{
    public const string Test1 = "https://documentstore1.dev.namespace.net/v2/service.svc/basicNoAuth";

    public const string Test2 = "https://documentstore1.dev.namespace.net/v2/service.svc";
}

public class Tests
{
    [Theory]
    [InlineData(Constants.Test1)]
    [InlineData(Constants.Test2)]
    public void ExampleTest(string url)
    {
        var test = url;
    }
}

}

我的HTML

var request = new XMLHttpRequest();



function getWeather() {
    var latitude = document.getElementById("lat").value;
    var longitude = document.getElementById("long").value;
    request.open('GET', 'https://api.openweathermap.org/data/2.5/weather?lat=' + latitude + '&lon=' + longitude + '&units=imperial&appid=547fa6dfa44cff13fa92bba2c465b366', true); 
    request.send();
    request.onreadystatechange = displayData;
}


function displayData() {
    if(request.readyState === 4 && request.status === 200) {
       var resultData = JSON.parse(request.responseText);
       var location = document.getElementById("location")
       var temperature = document.getElementById("temperature");
       var windspeed = document.getElementById("windspeed");
       var condition = document.getElementById("condition");
       location.value = resultData.name +", " + resultData.sys.country;
       temperature.value = resultData.main.temp + " degrees Fahrenheit";
       windspeed.value = resultData.wind.speed + " miles per hour";
       condition.value = resultData.weather.description;
       document.getElementById("resultset").style.visibility = "visible";
    }
 }

 // Create an event handler for when the btn button is clicked
 window.onload = function() {
     var btn = document.getElementById("btn");
     btn.addEventListener("click", getWeather, false);
}

Answer 1

如果看到API at the OpenWeatherMap site，我们将看到weather属性是一个数组。要访问天气的描述，请尝试weather[0].description，或者更好的方法是，循环浏览并提取每种天气情况的描述（如果适合您的用例）。

尝试在JavaScript中检索API

1 个答案: