/// <summary>
/// Парсит html страницы яндекс погоды
/// </summary>
private async void DoWork(object obj)
{
_logger.LogInformation("Получение всех городов.");
TownWeatherContext townWeatherContext = new TownWeatherContext();
WebRequest webRequest = WebRequest.Create(Domen + Region);
webRequest.Method = "GET";
WebResponse response = await webRequest.GetResponseAsync();
using (StreamReader reader = new StreamReader(response.GetResponseStream()))
{
//Парсим html
string html = reader.ReadToEnd();
HtmlParser parser = new HtmlParser();
IHtmlDocument document = parser.ParseDocument(html);
foreach (IElement element in document.QuerySelectorAll(".place-list__item-name"))
{
string townName = element.InnerHtml;
//Если город уже есть в бд, то не добавляем его, а обновляем ему погоду.
Town town = townWeatherContext
.Towns
.Where(t => t.Name == townName)
.Include(t => t.Weathers)
.FirstOrDefault();
if (town == null)
{
town = new Town
{
Name = townName,
Weathers = new List <Weather>()
};
SetWeathers(element.GetAttribute("href"), town);
townWeatherContext.Towns.Add(town);
}
else
{
town.Weathers.Clear();
townWeatherContext.SaveChanges();
SetWeathers(element.GetAttribute("href"), town);
}
townWeatherContext.SaveChanges();
}
}
response.Close();
}
public TownsController(ILogger <TownsController> logger)
{
_logger = logger;
_context = new TownWeatherContext();
}