public void ProcessFeed()
{
WebRequest request = WebRequest.Create(_feedUrl);
using (var response = request.GetResponse())
{
var xmlReader = XmlReader.Create(response.GetResponseStream());
XDocument document = XDocument.Load(xmlReader);
IEnumerable <Article> articles = document.Descendants("channel")
.Elements("item")
.Select(i => new Article
{
Title = i.Element("title").Value,
Link = i.Element("link").Value,
Category = i.Element("category")?.Value,
Description = i.Element("Description")?.Value ?? i.Element("description").Value,
PublicationDate = DateTime.ParseExact(Rfc822DateTime.ConvertZoneToLocalDifferential(i.Element("pubDate").Value), Rfc822DateTime.Rfc822DateTimePatterns, DateTimeFormatInfo.InvariantInfo, DateTimeStyles.AdjustToUniversal)
});
foreach (var article in articles)
{
Runner.UpdateCount();
string querry = SqlQuerry.sqlRequest;
using (SqlCommand updSql = new SqlCommand(querry, con))
{
updSql.Parameters.AddWithValue("@Title", article.Title);
updSql.Parameters.AddWithValue("@Link", article.Link);
updSql.Parameters.AddWithValue("@Category", article.Category);
updSql.Parameters.AddWithValue("@Description", article.Description);
updSql.Parameters.AddWithValue("@PublicationDate", article.PublicationDate);
con.Open();
updSql.ExecuteNonQuery();
con.Close();
}
}
if (_feedUrl == "http://habrahabr.ru/rss/")
{
Console.WriteLine($"Прочитано новостей с habr.com: {Runner.ArticleCount}");
Runner.ArticleCount = 0;
}
if (_feedUrl == "http://www.interfax.by/news/feed/")
{
Console.WriteLine($"Прочитано новостей с interfax.by: {Runner.ArticleCount}");
Runner.ArticleCount = 0;
}
}
}
/// <summary>
/// Converts the specified string representation of a date and time to its <see cref="DateTime"/> equivalent.
/// </summary>
/// <param name="s">A string containing a date and time to convert.</param>
/// <param name="result">
/// When this method returns, contains the <see cref="DateTime"/> value equivalent to the date and time
/// contained in <paramref name="s"/>, expressed as <i>Coordinated Universal Time (UTC)</i>,
/// if the conversion succeeded, or <see cref="DateTime.MinValue">MinValue</see> if the conversion failed.
/// The conversion fails if the s parameter is a <b>null</b> reference (Nothing in Visual Basic),
/// or does not contain a valid string representation of a date and time.
/// This parameter is passed uninitialized.
/// </param>
/// <returns><b>true</b> if the <paramref name="s"/> parameter was converted successfully; otherwise, <b>false</b>.</returns>
/// <remarks>
/// The string <paramref name="s"/> is parsed using formatting information in the <see cref="DateTimeFormatInfo.InvariantInfo"/> object.
/// </remarks>
public static bool TryParse(string s, out DateTime result)
{
//------------------------------------------------------------
// Attempt to convert string representation
//------------------------------------------------------------
bool wasConverted = false;
result = DateTime.MinValue;
if (!String.IsNullOrEmpty(s))
{
DateTime parseResult;
if (DateTime.TryParseExact(Rfc822DateTime.ConvertZoneToLocalDifferential(s), Rfc822DateTime.Rfc822DateTimePatterns, DateTimeFormatInfo.InvariantInfo, DateTimeStyles.AdjustToUniversal, out parseResult))
{
result = DateTime.SpecifyKind(parseResult, DateTimeKind.Utc);
wasConverted = true;
}
}
return(wasConverted);
}
//============================================================
// Public Methods
//============================================================
#region Parse(string s)
/// <summary>
/// Converts the specified string representation of a date and time to its <see cref="DateTime"/> equivalent.
/// </summary>
/// <param name="s">A string containing a date and time to convert.</param>
/// <returns>
/// A <see cref="DateTime"/> equivalent to the date and time contained in <paramref name="s"/>,
/// expressed as <i>Coordinated Universal Time (UTC)</i>.
/// </returns>
/// <remarks>
/// The string <paramref name="s"/> is parsed using formatting information in the <see cref="DateTimeFormatInfo.InvariantInfo"/> object.
/// </remarks>
/// <exception cref="ArgumentNullException"><paramref name="s"/> is a <b>null</b> reference (Nothing in Visual Basic).</exception>
/// <exception cref="ArgumentNullException"><paramref name="s"/> is an empty string.</exception>
/// <exception cref="FormatException"><paramref name="s"/> does not contain a valid RFC 822 string representation of a date and time.</exception>
public static DateTime Parse(string s)
{
//------------------------------------------------------------
// Validate parameter
//------------------------------------------------------------
if (String.IsNullOrEmpty(s))
{
throw new ArgumentNullException("s");
}
DateTime result;
if (Rfc822DateTime.TryParse(s, out result))
{
return(result);
}
else
{
throw new FormatException(String.Format(null, "{0} is not a valid RFC 822 string representation of a date and time.", s));
}
}
