string date comparsion using linq C#

Question

0.00/5 (No votes)

See more:

string date comparsion using linq C#

I got error "String was not recognized as a valid DateTime"

C#

string ctfromdate="20/10/2015";
string cttodate="20/10/2015";

var startDate = DateTime.Parse(ctfromdate);
var EndDate = DateTime.Parse(cttodate);

Linq code:

C#

   var date = item.ctroomlist.Where(x => x.RoomTypeId == RoomTypeId).SingleOrDefault().ctroomrate.
Where(x => Convert.ToDateTime(x.Date)>=startDate &&Convert.ToDateTime(x.Date)<= EndDate).ToList();

Posted 5-Oct-15 3:36am

Member 10918596

Updated 5-Oct-15 4:06am

Naveen.Sanagasetti

v4

Add a Solution

Comments

Member 10918596 5-Oct-15 9:59am

var date = item.ctroomlist
.Where(x => x.RoomTypeId == RoomTypeId).SingleOrDefault().ctroomrate
.Where(x =>
Convert.ToDateTime(x.Date) >= startDate &&
Convert.ToDateTime(x.Date) <= EndDate)
.ToList();

Richard Deeming 5-Oct-15 11:29am

Simple answer: don't store dates as strings. In .NET, use the DateTime type. In your database, use one of the available date types.

Storing dates as strings will only lead to pain later on.

3 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Krunal Rohit · Answer 1 · 2015-10-05T03:48:00

Solution 2

Try this,
var fromDate = DateTime.ParseExact(ctfromdate, "dd/MM/yyyy", null);

-KR

Posted 5-Oct-15 3:48am

Krunal Rohit

Maciej Los · Answer 2 · 2015-10-05T07:24:00

Hmmm...
In few words: string representation of DateTime data type depends on localization.

Please see:
Design and Implementation Guidelines for Web Clients[^]
How to: Display Localized Date and Time Information to Web Users[^]
Formatting Date and Time for a Specific Culture[^]

I'd suggest to use extension method to "convert" string into DateTime using specific localization:

C#

public static class DateExtensionMethods
{
	public static DateTime StrToDate(string strDate)
	{	
		System.Globalization.CultureInfo culture = System.Globalization.CultureInfo.CreateSpecificCulture("en-US"); //en-US //fr-FR //de-DE
		DateTime dt;
		//if convertion failed, return default value 
		return DateTime.TryParse(strDate, culture, System.Globalization.DateTimeStyles.None, out dt) ? dt : new DateTime(1899,12,31);
	}
}

Usage:

C#

void Main()
{
    List<string> stringDates = new List<string>()
        {"20/10/2015",
        "10/20/2015",
        "2013/10/20",
        "10/20/2014",
        "2015/10/20",
        "2015/20/10"};

    var result = stringDates.Select(d=>DateExtensionMethods.StrToDate(d));

}

Result:

1899-12-31 00:00:00
2015-10-20 00:00:00
2013-10-20 00:00:00
2014-10-20 00:00:00
2015-10-20 00:00:00
1899-12-31 00:00:00

Final remark:
you should work on data, not on its string representation!

vagelis1 · Answer 3 · 2015-10-05T03:45:00

Solution 1

C#

var date = item.ctroomlist.Where(x => x.RoomTypeId == RoomTypeId).SingleOrDefault().ctroomrate.AsEnumerable().Where(x => DateTime.Parse(x.Date)>

you miss some code in your question but the above should do!

Posted 5-Oct-15 3:45am

vagelis1

Updated 5-Oct-15 3:47am

v3