private static void CheckDateRoundtrips(DateTime now)
{
var ms = (now - new DateTime(1970, 1, 1)).Ticks / 10000;
var serializedNow = AspTools.SerializeDateTimeToString(now);
Assert.AreEqual(string.Format("/Date({0})/", ms), serializedNow);
var jsonString = new JsonString(serializedNow);
Debug.WriteLine(jsonString.ToString());
var dNow = AspTools.ParseStringToDateTime(jsonString);
Assert.AreEqual(
new DateTime(now.Year, now.Month, now.Day, now.Hour, now.Minute, now.Second, now.Millisecond),
new DateTime(dNow.Year, dNow.Month, dNow.Day, dNow.Hour, dNow.Minute, dNow.Second, dNow.Millisecond));
}
/// <summary>
/// parses a string in the format '\/Date(700000+0500)\/' to a datetime value.
/// </summary>
/// <param name="str">must be a non-null, valid serialized datetime string</param>
/// <returns>Valid datetime</returns>
/// <exception cref="AspDateTimeException">throws a AspDateTimeException if the str is not in the correct format</exception>
/// <exception cref="ArgumentException">thrown if str is null</exception>
/// <see cref="http://msdn.microsoft.com/en-us/library/bb412170.aspx"/>
public static DateTime ParseStringToDateTime(JsonString str)
{
Contract.Requires(str != null);
var match = PARSE_DATETIME_STR.Match(str);
if (!match.Success) throw new AspDateTimeException(string.Format("'{0}' is not a valid format ({1})", str.Value, DATETIME_REGEX_STR));
var matchedValue = match.Groups[1].Value;
bool isUtc = true;
var indexOf = matchedValue.IndexOf('+');
if (indexOf > -1)
{
isUtc = false;
matchedValue = matchedValue.Substring(0, indexOf);
}
try
{
var ms = long.Parse(matchedValue);
if (ms > 0)
{
return new DateTime(1970, 1, 1, 0, 0, 0, isUtc ? DateTimeKind.Utc : DateTimeKind.Local)
+ new TimeSpan(ms * 10000);
}
else
{
return new DateTime(1970, 1, 1, 0, 0, 0, isUtc ? DateTimeKind.Utc : DateTimeKind.Local)
- new TimeSpan(-ms * 10000);
}
}
catch (FormatException fe)
{
throw new AspDateTimeException("datetime string is not in the correct format; cannot parse to long", fe);
}
}
