How to select only date from string in C#

Question

4.00/5 (1 vote)

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hello i have a string i my application which is i am retrieving from database i want to only select the date from my string

What I have tried:

my string is string var = P 2016-10-31; i have tried this but i can able get only P from this what can i do so i can able to select only date (2016-10-31)

Posted 31-Oct-16 1:32am

AZHAR SAYYAD

Updated 31-Oct-16 2:26am

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Comments

Perić Željko 31-Oct-16 9:36am

On this link there is interesting stuff about strings and dates inside them :

http://www.codeproject.com/Answers/297126/Csharp-How-to-check-if-a-string-contains-a-date#answer8

4 solutions

Solution 1

C#

string myString = "P 2016-10-31";
string[] parts = mystring.Split(' ');
DateTime date = DateTime.ParseExact(parts[1], "yyyy-MM-dd", CultureInfo.InvariantCulture);

Posted 31-Oct-16 1:39am

#realJSOP

Solution 3

C#

string s = "P 2016-10-31";
DateTime dt;
DateTime.TryParseExact(s, "P yyyy-MM-dd", System.Globalization.CultureInfo.CurrentCulture, System.Globalization.DateTimeStyles.None, out dt);

Posted 31-Oct-16 2:18am

F-ES Sitecore

Solution 4

I had a similar problem a while back, where multiple dates, with multiple structures, could be anywhere in a document. The following code got them all:
(Note: I'm in Australia, so short date format is dd/MM/yy).

C#

string test;
 
Regex re = new Regex(@"\b(?<datetime>" +
		// Date part
		@"((" +
			@"(\d{1,2}[\/\-\.]\d{1,2}[\/\-\.]\d{2}(\d{2})?)" +
			@"|(\d{1,2}\s+(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)[a-zA-Z]*,?\s+\d{2}\d{2}?)" + 
			@"|((Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)[a-zA-Z]*\s+\d{1,2},?\s+\d{2}\d{2}?)" +
			@"|(\d{4}\-\d{1,2}-\d{1,2})" +
		@")" +
		// Optional time part
		@"(" +
			@"[T\s]?\d{1,2}:\d{1,2}(:\d{1,2}(\.\d+)?)?(([AP]M)|([\+\-][12]?\d:\d{1,2})|Z)?" +
		@")?)" +
		// Stand alone time
		@"|(\d{1,2}:\d{1,2}(:\d{1,2}(\.\d+)?)?(([AP]M)|([\+\-][12]?\d:\d{1,2})|Z)?)" +
    @")\b", RegexOptions.IgnoreCase);
 
test = " 29/11/15 xxx 29 November 2015 6:27PM xxx 2015-11-29T18:27:45.50+10:00 xxx 2015-11-29 18:27:45.50Z xxx NOV 29, 2015 xxxx 21:15";
 
MatchCollection matches = re.Matches(test);
 
foreach (Match m in matches) {
	DateTime dt;
	if (DateTime.TryParse(m.Groups["datetime"].Value, out dt)
		Console.WriteLine("{0}\t\t{1}", m.Groups["datetime"].Value, dt);
}

Posted 31-Oct-16 2:26am

Midi_Mick

Updated 31-Oct-16 2:30am

v2

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OriginalGriff · Accepted Answer · 2016-10-31T01:46:00

It really depends on the format of the data - if it's always a single char, a space, and then the date, it's trivial:

C#

string input = "P 2016-10-31";
string justTheDate = input.Substring(2);
DateTime dt;
if (DateTime.TryParseExact(justTheDate, "yyyy-M-dd", CultureInfo.InvariantCulture, DateTimeStyles.None, out dt))
    {
    ...
    }

If it varies, then you need to look closely at exactly what it can be and maybe consider a Regex instead.