How do you convert a string such as 2009-05-08 14:40:52,531 into a DateTime?
Since you are handling 24-hour based time and you have a comma separating the seconds fraction, I recommend that you specify a custom format:
DateTime myDate = DateTime.ParseExact("2009-05-08 14:40:52,531", "yyyy-MM-dd HH:mm:ss,fff",
System.Globalization.CultureInfo.InvariantCulture);
You have basically two options for this. DateTime.Parse() and DateTime.ParseExact().
The first is very forgiving in terms of syntax and will parse dates in many different formats. It is good for user input which may come in different formats.
ParseExact will allow you to specify the exact format of your date string to use for parsing. It is good to use this if your string is always in the same format. This way, you can easily detect any deviations from the expected data.
You can parse user input like this:
DateTime enteredDate = DateTime.Parse(enteredString);
If you have a specific format for the string, you should use the other method:
DateTime loadedDate = DateTime.ParseExact(loadedString, "d", null);
"d" stands for the short date pattern (see MSDN for more info) and null specifies that the current culture should be used for parsing the string.
try this
DateTime myDate = DateTime.Parse(dateString);
a better way would be this:
DateTime myDate;
if (!DateTime.TryParse(dateString, out myDate))
{
// handle parse failure
}
Use DateTime.Parse(string):
DateTime dateTime = DateTime.Parse(dateTimeStr);
Nobody seems to implemented an extension method. With the help of #CMS's answer:
Working and improved full source example is here: Gist Link
namespace ExtensionMethods {
using System;
using System.Globalization;
public static class DateTimeExtensions {
public static DateTime ToDateTime(this string s,
string format = "ddMMyyyy", string cultureString = "tr-TR") {
try {
var r = DateTime.ParseExact(
s: s,
format: format,
provider: CultureInfo.GetCultureInfo(cultureString));
return r;
} catch (FormatException) {
throw;
} catch (CultureNotFoundException) {
throw; // Given Culture is not supported culture
}
}
public static DateTime ToDateTime(this string s,
string format, CultureInfo culture) {
try {
var r = DateTime.ParseExact(s: s, format: format,
provider: culture);
return r;
} catch (FormatException) {
throw;
} catch (CultureNotFoundException) {
throw; // Given Culture is not supported culture
}
}
}
}
namespace SO {
using ExtensionMethods;
using System;
using System.Globalization;
class Program {
static void Main(string[] args) {
var mydate = "29021996";
var date = mydate.ToDateTime(format: "ddMMyyyy"); // {29.02.1996 00:00:00}
mydate = "2016 3";
date = mydate.ToDateTime("yyyy M"); // {01.03.2016 00:00:00}
mydate = "2016 12";
date = mydate.ToDateTime("yyyy d"); // {12.01.2016 00:00:00}
mydate = "2016/31/05 13:33";
date = mydate.ToDateTime("yyyy/d/M HH:mm"); // {31.05.2016 13:33:00}
mydate = "2016/31 Ocak";
date = mydate.ToDateTime("yyyy/d MMMM"); // {31.01.2016 00:00:00}
mydate = "2016/31 January";
date = mydate.ToDateTime("yyyy/d MMMM", cultureString: "en-US");
// {31.01.2016 00:00:00}
mydate = "11/شعبان/1437";
date = mydate.ToDateTime(
culture: CultureInfo.GetCultureInfo("ar-SA"),
format: "dd/MMMM/yyyy");
// Weird :) I supposed dd/yyyy/MMMM but that did not work !?$^&*
System.Diagnostics.Debug.Assert(
date.Equals(new DateTime(year: 2016, month: 5, day: 18)));
}
}
}
I tried various ways. What worked for me was this:
Convert.ToDateTime(data, CultureInfo.InvariantCulture);
data for me was times like this 9/24/2017 9:31:34 AM
Try the below, where strDate is your date in 'MM/dd/yyyy' format
var date = DateTime.Parse(strDate,new CultureInfo("en-US", true))
Convert.ToDateTime or DateTime.Parse
DateTime.Parse
Syntax:
DateTime.Parse(String value)
DateTime.Parse(String value, IFormatProvider provider)
DateTime.Parse(String value, IFormatProvider provider, DateTypeStyles styles)
Example:
string value = "1 January 2019";
CultureInfo provider = new CultureInfo("en-GB");
DateTime.Parse(value, provider, DateTimeStyles.NoCurrentDateDefault););
Value: string representation of date and time.
Provider: object which provides culture specific info.
Styles: formatting options that customize string parsing for some date and time parsing methods. For instance, AllowWhiteSpaces is a value which helps to ignore all spaces present in string while it parse.
It's also worth remembering DateTime is an object that is stored as number internally in the framework, Format only applies to it when you convert it back to string.
Parsing converting a string to the internal number type.
Formatting converting the internal numeric value to a readable
string.
I recently had an issue where I was trying to convert a DateTime to pass to Linq what I hadn't realised at the time was format is irrelevant when passing DateTime to a Linq Query.
DateTime SearchDate = DateTime.Parse(searchDate);
applicationsUsages = applicationsUsages.Where(x => DbFunctions.TruncateTime(x.dateApplicationSelected) == SearchDate.Date);
Full DateTime Documentation
string input;
DateTime db;
Console.WriteLine("Enter Date in this Format(YYYY-MM-DD): ");
input = Console.ReadLine();
db = Convert.ToDateTime(input);
//////// this methods convert string value to datetime
///////// in order to print date
Console.WriteLine("{0}-{1}-{2}",db.Year,db.Month,db.Day);
You could also use DateTime.TryParseExact() as below if you are unsure of the input value.
DateTime outputDateTimeValue;
if (DateTime.TryParseExact("2009-05-08 14:40:52,531", "yyyy-MM-dd HH:mm:ss,fff", System.Globalization.CultureInfo.InvariantCulture, System.Globalization.DateTimeStyles.None, out outputDateTimeValue))
{
return outputDateTimeValue;
}
else
{
// Handle the fact that parse did not succeed
}
I just found an elegant way:
Convert.ChangeType("2020-12-31", typeof(DateTime));
Convert.ChangeType("2020/12/31", typeof(DateTime));
Convert.ChangeType("2020-01-01 16:00:30", typeof(DateTime));
Convert.ChangeType("2020/12/31 16:00:30", typeof(DateTime), System.Globalization.CultureInfo.GetCultureInfo("en-GB"));
Convert.ChangeType("11/شعبان/1437", typeof(DateTime), System.Globalization.CultureInfo.GetCultureInfo("ar-SA"));
Convert.ChangeType("2020-02-11T16:54:51.466+03:00", typeof(DateTime)); // format: "yyyy'-'MM'-'dd'T'HH':'mm':'ss'.'fffzzz"
Put this code in a static class> public static class ClassName{ }
public static DateTime ToDateTime(this string datetime, char dateSpliter = '-', char timeSpliter = ':', char millisecondSpliter = ',')
{
try
{
datetime = datetime.Trim();
datetime = datetime.Replace(" ", " ");
string[] body = datetime.Split(' ');
string[] date = body[0].Split(dateSpliter);
int year = date[0].ToInt();
int month = date[1].ToInt();
int day = date[2].ToInt();
int hour = 0, minute = 0, second = 0, millisecond = 0;
if (body.Length == 2)
{
string[] tpart = body[1].Split(millisecondSpliter);
string[] time = tpart[0].Split(timeSpliter);
hour = time[0].ToInt();
minute = time[1].ToInt();
if (time.Length == 3) second = time[2].ToInt();
if (tpart.Length == 2) millisecond = tpart[1].ToInt();
}
return new DateTime(year, month, day, hour, minute, second, millisecond);
}
catch
{
return new DateTime();
}
}
In this way, you can use
string datetime = "2009-05-08 14:40:52,531";
DateTime dt0 = datetime.TToDateTime();
DateTime dt1 = "2009-05-08 14:40:52,531".ToDateTime();
DateTime dt5 = "2009-05-08".ToDateTime();
DateTime dt2 = "2009/05/08 14:40:52".ToDateTime('/');
DateTime dt3 = "2009/05/08 14.40".ToDateTime('/', '.');
DateTime dt4 = "2009-05-08 14:40-531".ToDateTime('-', ':', '-');
String now = DateTime.Now.ToString("YYYY-MM-DD HH:MI:SS");//make it datetime
DateTime.Parse(now);
this one gives you
2019-08-17 11:14:49.000
Different cultures in the world write date strings in different ways. For example, in the US 01/20/2008 is January 20th, 2008. In France this will throw an InvalidFormatException. This is because France reads date-times as Day/Month/Year, and in the US it is Month/Day/Year.
Consequently, a string like 20/01/2008 will parse to January 20th, 2008 in France, and then throw an InvalidFormatException in the US.
To determine your current culture settings, you can use System.Globalization.CultureInfo.CurrentCulture.
string dateTime = "01/08/2008 14:50:50.42";
DateTime dt = Convert.ToDateTime(dateTime);
Console.WriteLine("Year: {0}, Month: {1}, Day: {2}, Hour: {3}, Minute: {4}, Second: {5}, Millisecond: {6}",
dt.Year, dt.Month, dt.Day, dt.Hour, dt.Minute, dt.Second, dt.Millisecond);
This worked for me:
CultureInfo provider = CultureInfo.InvariantCulture;
DateTime dt = DateTime.ParseExact("2009-05-08 14:40:52,531","yyyy-MM-dd HH:mm:ss,fff", provider);
Do you want it fast?
Let's say you have a date with format yyMMdd.
The fastest way to convert it that I found is:
var d = new DateTime(
(s[0] - '0') * 10 + s[1] - '0' + 2000,
(s[2] - '0') * 10 + s[3] - '0',
(s[4] - '0') * 10 + s[5] - '0')
Just, choose the indexes according to your date format of choice. If you need speed probably you don't mind the 'non-generic' way of the function.
This method takes about 10% of the time required by:
var d = DateTime.ParseExact(s, "yyMMdd", System.Globalization.CultureInfo.InvariantCulture);
Is there a way to convert a yyyy/ddd string to Date in C#?
For example 2019003 is January 3, 2019.
Also to validate if the string is yyyy/ddd format.
Kindly help
You could make a TryParse method like this:
public static bool TryParseSpecialDate(string dateString, out DateTime parsedDate)
{
parsedDate = DateTime.MinValue;
// parse yyyy/DDD into 2 separate capture groups
var match = Regex.Match(dateString ?? string.Empty, #"^(\d{4})/(\d{3})$");
if (!match.Success)
{
return false;
}
// Create a date for yyyy/01/01
var yearDate = new DateTime(int.Parse(match.Groups[1].Value), 1, 1);
var dayOfYear = int.Parse(match.Groups[2].Value);
if (dayOfYear < 1 || dayOfYear > 366)
{
return false;
}
// Add the required number of days
var result = yearDate.AddDays(dayOfYear - 1);
// Check that it's the same year (so that 2019/888 won't work, or 366 in a non leap year)
if (result.Year != yearDate.Year)
{
return false;
}
// Set the date and return it
parsedDate = result;
return true;
}
I've used regex (I didn't need to but it seemed easier, feel free to replace it with string operations instead). This then starts from January in the desired year, and adds the number of days to it.
Usage:
bool success = DateTimeHelpers.TryParseSpecialDate("2019/354", out tmp);
Output will be 2019/12/20
Try it online
You can probably do this:
string julianDate = "2019003";
int year = Convert.ToInt32(julianDate.Substring(0, 4));
int dayOfYear = Convert.ToInt32(julianDate.Substring(4));
DateTime dateTime = new DateTime(year-1, 12, 18, new JulianCalendar());
dateTime = dateTime.AddDays(dayOfYear);
This should return the desired date.
Reference:
I want to covert julian date(YYJJJ format) to any normal date format(MMDDYY) using c#. Is there any defined function for that?
Here's method to achieve that:
public DateTime ParseDateString(string strDt)
{
// validate string, pattern explanation:
// \d - match sigle digit
// ^ - match beginning of a string
// $ - match end of a string
// /? - match zero or one /
if(! Regex.Match(strDt, #"^\d\d\d\d/?\d\d\d$").Success)
throw new ArgumentException("Invalid string");
// get rid of a optional /
strDt = strDt.Replace("/", "");
var days = int.Parse(dt.Substring(4));
var year = int.Parse(dt.Substring(0, 4));
var date = new DateTime(year, 1, 1);
return date.AddDays(days - 1);
}
Trying to figure out how to add a century prefix (19 or 20) to a birth date. Does anyone see how to write this in a better way?
public string GetCenturyPrefix(string socSecNo)
{
string prefix = string.Empty;
try
{
var currentDate = DateTime.Now;
var birthDayTemp = socSecNo.Substring(0, 6);
var yy = birthDayTemp.Substring(0, 2);
var mm = birthDayTemp.Substring(2, 2);
var dd = birthDayTemp.Substring(4, 2);
birthDayTemp = yy + "-" + mm + "-" + dd;
var birthDay = Convert.ToDateTime(birthDayTemp);
var totalDays = currentDate - birthDay;
var age = totalDays.TotalDays / 365;
var yearsAfter2000 = Convert.ToInt32(currentDate.Year.ToString().Substring(2, 2));
if (age > yearsAfter2000)
{
prefix = "19";
}
else
{
prefix = "20";
}
}
catch (Exception)
{
}
return prefix;
}
Don't use Substring to parse a string value into a DateTime. .Net has very robust methods created for you to do this conversion.
Here I'm using DateTime.TryParseExact(), which lets me specify the exact format I expect dates values to be provided in. The method returns true or false indicating if the value is in that supplied format. No need to use exceptions to control logic flow.
public string GetCenturyPrefix(string socSecNo)
{
// Check if you're able to parse the incoming value
// in the format "yyMMdd".
if (!DateTime.TryParseExact(socSecNo, "yyMMdd", CultureInfo.InvariantCulture,
DateTimeStyles.None, out DateTime parsedDateTime))
{
// Do something if the input can't be parsed in that format.
// In this example I'm throwing an exception, but you can also
// return an empty string.
throw new Exception("Not valid date format");
}
// Extract only the Year portion as a 4 digit string,
// and return the first 2 characters.
return parsedDateTime.ToString("yyyy").Substring(0, 2);
}
You can do it like (year/100)+1 but put {0:n0} format to your .ToString("{0:n0}") this could be the logic and for the if else it can stay like that. This should be working for any century as I tried on calculator.
I have two concatenated values such as
string BreakOut = "10:15 Mintes";
string BreakIn = "10:30 Minutes";
I want result as
Total=15 Minutes
It is a time difference calculation. But values are not in a time format it is in a string format. How can I do this. Please suggest a way. I tried like
TimeSpan span=Convert.ToDateTime(BreakOut ).Subtract(Convert.ToDateTime(BreakIn ));
There is no point to parse them to DateTime since they are time interval. TimeSpan would be better choice since it is exactly what this for.
If Mintes is typo and your values are always the same standard format, you can easily split them with white space and then parse to TimeSpan.
For example;
var BreakOut= "10:15 Minutes";
var BreakIn = "10:30 Minutes";
BreakOut = BreakOut.Split(new string[]{" "},
StringSplitOptions.RemoveEmptyEntries)[0];
BreakIn = BreakIn.Split(new string[] { " " },
StringSplitOptions.RemoveEmptyEntries)[0];
var ts1 = TimeSpan.Parse(BreakOut, CultureInfo.InvariantCulture);
var ts2 = TimeSpan.Parse(BreakIn, CultureInfo.InvariantCulture);
var difference = ts2 - ts1;
Console.WriteLine("{0} minutes", difference.TotalMinutes); // 15 Minutes
Here a demonstration.
if your values always refers to the same day,
you can use something like that :
string BreakOut="10:15" ;
string BreakIn ="10:30";
double res =DiffInMinutes(BreakIn, BreakOut);
//Total=15 Minutes
public static double DiffInMinutes(string _BreakIn, string _BreakOut)
{
double diff = 0;
string[] BreakIn = _BreakIn.Split(':');
string[] BreakOut = _BreakOut.Split(':');
//timeSpan instanciated with Hours/minutes/seconds
TimeSpan TimeElapsed = new TimeSpan(int.Parse(BreakOut[0]) - int.Parse(BreakIn[0]), int.Parse(BreakOut[1]) - int.Parse(BreakIn[1]), 0);
diff = TimeElapsed.TotalMinutes;
return diff;
}
I downvoted your question, but maybe you really dont know that there is TimeSpan.Parse
string breakOut = "10:15 Minutes";
string breakIn = "10:30 Minutes";
string cleanBreakIn = breakIn.Split(' ')[0];
string cleanBreakOut = breakOut.Split(' ')[0];
TimeSpan total = TimeSpan.Parse(cleanBreakIn) - TimeSpan.Parse(cleanBreakOut);
I try to popup a msgbox that shows the months and years of the given dates for example
my input is:
7/2012 and 2/2013
and the output should be:
7/2012,8/2012,9/2012,10/2012,11/2012,12/2012,1/2013,2/2013
I wrote:
string datePart1;
string datePart2;
string[] date1 = new string[] { "" };
string[] date2 = new string[] { "" };
private void button1_Click(object sender, EventArgs e)
{
DateTime endDate = new DateTime(2013, 2, 1); // i will be having the date time as a variable from a textbox
DateTime begDate = new DateTime(2012, 7, 1); // i will be having the date time as a variable from a text box
int year, month;
if (endDate.Month - begDate.Month < 0)
{
month = (endDate.Month - begDate.Month) + 12;
endDate = new DateTime(endDate.Year - 1, endDate.Month, endDate.Day);
}
else
month = endDate.Month - begDate.Month;
year = endDate.Year - begDate.Year;
The above code calculates the time difference, but my attempts at outputting haven't worked.
Here's a sample to get you started.
It provides a handy MonthsInRange() method which returns a sequence of all the months in the specified range. You can then format the returned dates using "M\\/yyyy" (see below) to output the required format. (Note: That's not a letter V, it's a backslash followed by a forward slash!)
See Custom Date and Time Format Strings for an explanation of the format string.
using System;
using System.Collections.Generic;
namespace Demo
{
public static class Program
{
static void Main(string[] args)
{
DateTime endDate = new DateTime(2013, 2, 1);
DateTime begDate = new DateTime(2012, 7, 1);
foreach (DateTime date in MonthsInRange(begDate, endDate))
{
Console.WriteLine(date.ToString("M\\/yyyy"));
}
}
public static IEnumerable<DateTime> MonthsInRange(DateTime start, DateTime end)
{
for (DateTime date = start; date <= end; date = date.AddMonths(1))
{
yield return date;
}
}
}
}
Why "M\\/yyyy" and not just "M/yyyy"?
This is because the "/" character in a DateTime format string will be interpreted as the "date separator", not a literal "/". In some locales, this will come out as "." and not "/".
To fix this, we need to escape it with a "\" character. However, we can't just use a single "\" because C# itself will interpret that as an escape character, and will use it to escape the following character. The C# escape sequence for a literal "\" is "\\", which is why we have to put "\\/" and not just "\/".
Alternatively you can turn of escaping of "\" characters by prefixing the string with an # character, like so:
#"M/yyyy"
You can use whichever you prefer.
Since you're not guaranteed to have dates with the same day, you can use this code which creates new dates that only consider the first of the month.
static IEnumerable<string> InclusiveMonths(DateTime start, DateTime end)
{
// copies to ensure the same day.
var startMonth = new DateTime(start.Year, start.Month, 1);
var endMonth = new DateTime(end.Year, end.Month, 1);
for (var current = startMonth; current <= endMonth; current = current.AddMonths(1))
yield return current.ToString("M/yyyy");
}
// usage
foreach (var mmyyyy in InclusiveMonths(begDate, endDate))
{
Console.WriteLine(mmyyyy);
}
var allMonths = string.Join(", ", InclusiveMonths(begDate, endDate));
Look into using the TimeSpan structure, it'll help you achieve your goal a lot faster.
http://msdn.microsoft.com/en-us/library/system.timespan.aspx
You may use
TimeSpan dateDifference = endDate - begDate;
year = dateDifference.Days / 365;
month = dateDifference.Days / 30;
Edit:
I forgot TimeSpan does not feature Year or Month, sorry :(