/// <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);
}
/// <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)
{
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));
}
}
public FeedInfo Parse(XmlReader reader)
{
try
{
FeedInfo info = new FeedInfo();
//create a List of type Dictionary<string,string> for the element names and values
var items = new List <Dictionary <string, string> >();
// declare a Dictionary to capture each current Item in the while loop
Dictionary <string, string> currentItem = null;
bool parsingItems = false;
/// Read each element with the reader
while (reader.Read())
{
// if it's an element, we want to process it
if (reader.NodeType == XmlNodeType.Element)
{
string name = reader.Name;
// rss1.0 - channel/title
// rss2.0 - channel/title
// atom0.3 - feed/title
// atom1.0 - feed/title
if (!parsingItems && name.ToLowerInvariant() == "title")
{
reader.Read();
info.ActualTitle = reader.Value;
}
if (name.ToLowerInvariant() == "item" || name.ToLowerInvariant() == "entry")
{
parsingItems = true;
// Save previous item
if (currentItem != null)
{
items.Add(currentItem);
}
// Create new item
currentItem = new Dictionary <string, string>();
}
else if (currentItem != null)
{
reader.Read();
// some feeds can have duplicate keys, so we don't want to blow up here:
if (!currentItem.ContainsKey(name))
{
currentItem.Add(name, reader.Value.Trim());
}
}
}
}
// Save previous item
if (currentItem != null)
{
items.Add(currentItem);
}
// now create a List of type GenericFeedItem
var itemList = new List <FeedItem>();
// iterate all our items from the reader
foreach (var d in items)
{
var itm = new FeedItem();
//do a switch on the Key of the Dictionary <string, string> of each item
foreach (string k in d.Keys)
{
switch (k)
{
case "title":
itm.Title = d[k];
break;
case "link":
itm.Link = d[k];
break;
case "published":
case "pubDate":
case "issued":
DateTime dt;
bool ok = Rfc822DateTime.TryParse(d[k], out dt);
itm.PubDate = ok ? dt : DateTime.Now;
break;
case "content":
case "description":
itm.Description = d[k];
break;
default:
break;
}
}
// add the created item to our List
itemList.Add(itm);
}
info.Items = itemList;
return(info);
}
catch
{
return(null);
}
}
