CODEWITHSUNDEEP
c#datetimeansi-c
ANisus
ANisus

Reputation: 77945

DateTime Parse ANSI C timestamp

I am trying to parse Date/Time formats in HTTP/1.1 headers as specified in RFC2616

How do I parse an ANSI C timestamp in C#?
The closest I get is:

string dateFormat = "ddd MMM d HH':'mm':'ss yyyy";
DateTime time = DateTime.ParseExact("Mon Jan  2 15:04:05 2006", dateFormat, CultureInfo.InvariantCulture);

The problem lies in "d" which does not accept a leading space in case it is a single digit date. And "dd" requires a leading 0 instead.

Is there any easy way around, or maybe a library that already handles the three allowed date/time formats in HTTP/1.1?

Upvotes: 1

Views: 832

Answers (1)

Soner Gönül
Soner Gönül

Reputation: 98740

How about using DateTime.TryParseExact overload that takes string[] as a format parameter with AllowInnerWhite style?

string s = "Sun, 06 Nov 1994 08:49:37 GMT";
DateTime dt;
var formats = new[] 
{
    "ddd, dd MMM yyyy HH:mm:ss 'GMT'",
    "dddd, dd-MMM-yy HH:mm:ss 'GMT'",
    "ddd MMM  d HH:mm:ss yyyy"
};
if(DateTime.TryParseExact(s, formats, CultureInfo.InvariantCulture,
                          DateTimeStyles.AllowInnerWhite, out dt))
{
    //
}

Upvotes: 2

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