I am working on passing a formatted datetime variable to SQL Server. I need to concatenate the date with the time, as they come from 2 different controls. The code seems to work okay and the two strings, once put together, are parsed as DateTime.
The problem is that when it goes up to SQL Server, the time part is lost and the column displays yyyy-mm-dd hh:mm:ss.fff as 2012-09-03 00:00:00.000 as opposed to 2012-09-03-12 1:23:45:678 (for example).
Here's my code, for testing I have replaced the time with a hard-coded variable, and objInfo.SemesterEnrollStart is a DateTime variable. Also, the control dpEnrollStart is a DatePicker.
DateTime semDate = Convert.ToDateTime(dpEnrollStart.SelectedDate);
string semTime = "12:34";
DateTime dtp = DateTime.ParseExact(semDate.ToShortDateString() + " " + semTime, "MM/dd/yyyy hh:mm", null);
objInfo.SemesterEnrollStart = dtp;
Thanks so much!
EDIT:
So, here's the c# that I am using to call the stored procedure:
objInfo.SemesterQuarter = ddl_SemQuarter.SelectedValue;
objInfo.SemesterYear = ddl_SemYear.SelectedValue;
objInfo.SemesterStart = Convert.ToDateTime(dpSemStart.SelectedDate);
objInfo.SemesterEnd = Convert.ToDateTime(dpSemEnd.SelectedDate);
DateTime semDate = Convert.ToDateTime(dpEnrollStart.SelectedDate);
string semTime = "12:34:00.000";
objInfo.SemesterEnrollStart = DateTime.ParseExact(semDate.ToShortDateString() + " " + semTime, "MM/dd/yyyy HH:mm:ss.fff", null);
objInfo.SemesterEnrollEnd = Convert.ToDateTime(dpEnrollEnd.SelectedDate);
objInfo.PriorityRegDate = Convert.ToDateTime(dpPriRegDate.SelectedDate);
objInfo.AgeCutoffDate = Convert.ToDateTime(dpAgeCutoffDate.SelectedDate);
lblTSMessage.Text = objInfo.SemesterEnrollStart.ToString();
objManager.AddNewSemester(objInfo);
The problem is in the format you are using in ParseExact:
MM/dd/yyyy hh:mm
Therefore, you are purposely discarding the seconds and milliseconds part.
Instead, you need to parse your date with: yyyy-MM-dd HH:mm:ss.fff but then you will need to capture seconds (ss) and milliseconds(fff) in the semTime variable or the ParseExact method will crap out.
One Example:
string s = "01/01/2012 11:23";
//FAILS because there's not ss and fff part
DateTime dtp = DateTime.ParseExact(s, "MM/dd/yyyy hh:mm:ss.fff", null);
string s = "01/01/2012 11:23:12.678";
//Works because there's a ss and fff part
DateTime dtp = DateTime.ParseExact(s, "MM/dd/yyyy hh:mm:ss.fff", null);
Related
I'm currently using C# and I want to convert a string like "2022-01-15 18:40:30" to a DateTime object with this format "15-01-2022 18:40:30". Below is what I've tried.
string stringDate = "2022-01-15 18:40:30";
string newStringDate = DateTime.ParseExact(date, "yyyy-MM-dd HH:mm:ss", CultureInfo.InvariantCulture).ToString("dd-MM-yyyy HH:mm:ss");
DateTime newDateFormat = DateTime.ParseExact(newStringDate, "dd-MM-yyyy HH:mm:ss", CultureInfo.InvariantCulture);
But the result i keep getting is "2022-01-15T18:40:30"
Any help would be appreciated
As others pointed out, you have a internal data value for DateTime.
So, FOR SURE we suggest that you convert the string into that internal format.
Once you do that, then you are free to output that internal date time value to ANY kind of format and output you want.
Thus, we have this:
string stringDate = "2022-01-15 18:40:30";
DateTime MyDate = DateTime.ParseExact(stringDate,"yyyy-MM-dd HH:mm:ss",CultureInfo.InvariantCulture);
// now we can output convert to anything we want.
Debug.Print("Day of week = " + MyDate.ToString("dddd"));
Debug.Print("Month = " + MyDate.ToString("MM"));
Debug.Print("Month (as text) = " + MyDate.ToString("MMMM"));
// desired format
Debug.Print(MyDate.ToString("dd-MM-yyyy HH:mm:ss"));
And output is this:
DateTime date = Convert.ToDateTime("2022-01-15");
DateTime time = Convert.ToDateTime("18:40:30");
DateTime dt = Convert.ToDateTime(date.ToShortDateString() + " " + time.ToShortTimeString());
try this style
Try this one:
string stringDate = "2022-01-15 18:40:30";
Console.WriteLine((DateTime.Parse(stringDate)).ToString("dd-MM-yyyy HH:mm:ss"));
The DateTime object by itself does not have a specific "format".
The string representation gets created when you call the .ToString() function.
There are multiple overloads of the ToString function with which you can specify the format.
I have a date time string that looks like this:
13.08.2014 17:17:45.000 UTC-60
I am trying to parse it into a C# date time object but it is not working as I expected.
Here is what I tried:
DateTime.ParseExact(dateToParse, "dd.MM.yyyy hh:mm:ss.fff Z", CultureInfo.InvariantCulture);
DateTime.ParseExact(dateToParse, "dd.MM.yyyy hh:mm:ss.fff UTC", CultureInfo.InvariantCulture);
DateTime.ParseExact(checkInDate, "dd.MM.yyyy hh:mm:ss.fff", CultureInfo.InvariantCulture);
They all return same error
{"String was not recognized as a valid DateTime."}
Some of the existing questions like this did not help either.
Any suggestions?
First, your main problem there with parsing is that your're using hh for 24h format. That should be HH. This should work:
DateTime.ParseExact("13.08.2014 17:17:45.000", "dd.MM.yyyy HH:mm:ss.fff", null, System.Globalization.DateTimeStyles.AssumeUniversal)
As for the UTC part, that's not standard format, so I suggest you to create a helper method that splits this string in 2, parse the first part as provided above, and parse the number after UTC and either add that to your DateTime:
myDate.AddMinutes(Int32.Parse("-60"))
Or create a DateTimeOffset. In either case, you must parse them individually.
How much control do you have over the time format.
.Net datetime parsing expects 2 things that are wrong with the current time format that you are trying to parse:
First, you have 24 hour time, so in your format you must use HH for hours, the lower case hh implies that the hours will be 12 hour format.
The UTC issue is another one that will require you to modify the string first, .Net expects timezone information in the form of HH:mm, so the following string and conversion will work, notice the key differences
var dateToParse = "13.08.2014 17:17:45.000 -01:00";
var value = DateTimeOffset.ParseExact(dateToParse, "dd.MM.yyyy HH:mm:ss.fff zzz", CultureInfo.InvariantCulture);
Use DateTimeOffset to maintain the TimeZone information
HH to map the hours
zzz to map the timezone information
So, to address you question, how can we parse the string into a format that we can then use to parse into a date time:
dateToParse = "13.08.2014 17:17:45.000 UTC-60";
string utc = null;
if (dateToParse.Contains("UTC"))
{
var tokens = dateToParse.Split(new string[] { "UTC" }, StringSplitOptions.None);
dateToParse = tokens[0];
utc = tokens[1];
int minutes = int.Parse(utc);
var offset = TimeSpan.FromMinutes(minutes);
bool negative = offset.Hours < 0;
dateToParse += (negative ? "-" : "") + Math.Abs(offset.Hours).ToString().PadLeft(2,'0') + ":" + offset.Minutes.ToString().PadLeft(2,'0');
}
var value = DateTimeOffset.ParseExact(dateToParse, "dd.MM.yyyy HH:mm:ss.fff zzz", CultureInfo.InvariantCulture);
To be honest, that was more complicated than I thought, there might be some regex expressions that might help, but this first principals approach to manipulating the string first works with your string.
Finally, now that we have a DateTimeOffset value, you can easily convert this into any local or other timezone without too much hassel, if you need to:
var asUtc = dateValue.UtcDateTime;
var asLocal = dateValue.LocalDateTime;
var asSpecific = dateValue.ToOffset(TimeSpan.FromHours(10)).DateTime;
I have a project that contain 3 string variables.
DateFormatStr is the format string I need to use to output dates.
DateFormatFrom is the start date a request will apply from
FilloutDateTo is the end date the request will apply to.
The problem is that I don't want to manually specify the dates. As you can see in my example below (a working example), I need to specify the dates, but is there a way to make it that the from date has time 00:00:00 and the end date has time 23:59:59?
string DateFormatStr = "MM/dd/yy hh:mm:ss tt";
string DateFormatFrom = "12/04/14 00:00:00";
string FilloutDateTo = "12/04/14 23:59:59";
So I would like to the system time to recognize the from date and the start date respecting the formatStr variable.
Thanks
If I understand correctly, you can use DateTime.Today property like;
var dt1 = DateTime.Today;
var dt2 = DateTime.Today.AddDays(1).AddSeconds(-1);
and use DateTime.ToString() to format them like;
var DateFormatFrom = dt1.ToString("MM/dd/yyyy HH:mm:ss", CultureInfo.InvariantCulture);
var FilloutDateTo = dt2.ToString("MM/dd/yyyy HH:mm:ss", CultureInfo.InvariantCulture);
Results will be;
12/04/2014 00:00:00
12/04/2014 23:59:59
You used hh format specifier but it is for 12-hour clock. Use HH format specifier instead which is for 24-hour clock. And since your result strings doesn't have any AM/PM designator, you don't need to use tt format specifier.
In C# 6.0 you can use string interpolation in order to display formatted dates.
DateTime startOfDay = DateTime.Today;
DateTime endOfDay = DateTime.Today.AddDays(1).AddTicks(-1);
string dateFormatFrom = $"{startOfDay: MM/dd/yy hh:mm:ss tt}";
string filloutDateTo = $"{endOfDay: MM/dd/yy hh:mm:ss tt}";
string idate = "01/11/2019 19:00:00";
DateTime odate = Convert.ToDateTime(idate);
DateTime sdate1 = DateTime.Parse(idate);
string outDate1 = String.Format("{0}/{1}/{2}", sdate1.Day, sdate1.Month,sdate1.Year);
Console.WriteLine(outDate1);
string final = Convert.ToString(DateTime.Parse(date, System.Globalization.CultureInfo.InvariantCulture) + TimeSpan.Parse(duration));
Hi, I use the above code to add two date's to eachother. It do work very well on Windows and returns the required format yyyy-MM-dd HH:mm:ss in a correct fashion. HOWEVER, when on Linux building with Mono it returns the following format dd/MM/yyyy HH:mm:ss which is not what I want.
How can I specify that I ONLY want the first formatting and nothing else? I tried playing around with ParseExact but it did not do very well. What I've heard ParseExact should not really be needed for this?
Here is a example of input:
string date = "2014-10-30 10:00:04"; // On windows
string duration = "05:02:10"; // duration to be added to date
Greetings.
Use ToString("yyyy-MM-dd HH:mm:ss") instead of Convert.ToString.
string date = "2014-10-30 10:00:04";
string duration = "05:02:10";
DateTime dt1 = DateTime.Parse(date, CultureInfo.InvariantCulture);
TimeSpan ts = TimeSpan.Parse(duration, CultureInfo.InvariantCulture);
DateTime dtFinal = dt1.Add(ts);
string final = dtFinal.ToString("yyyy-MM-dd HH:mm:ss", CultureInfo.InvariantCulture);
Convert.ToString uses your current culture's date separator, use CultureInfo.InvariantCulture.
Read: Custom Date and Time Format Strings
You can use the ToString() Method of the DateTime object.
var dt = DateTime.Now;
dt.ToString("yyyy-MM-dd HH:mm");
Using your code:
string _final = (DateTime.Parse(date, System.Globalization.CultureInfo.InvariantCulture) + TimeSpan.Parse(duration)).ToString("yyyy-MM-dd HH:mm:ss");
I have a win form c# SQL app that stores date in one column and time in the another.
There is only one date time picker on my form and I want to display both date and time values (which are from two separate columns)..
So far this is what I've done
Datetime final = datetime. Parse exact (date + " " + time , "MM/dd/yyyy hh:mm tt", cultureinfo. Invariant culture);
But it throws " string was not recognized as valid datetime" exception on the above line.
If date and time are DateTime variables, you can combine them with date arithmetic:
DateTime date=...;
DateTime time = ...;
DateTime finalDate = date.Date + time.TimeOfDay;
If they are strings, you can parse them to DateTime and TimeSpan variables:
DateTime date=DateTime.ParseExact(dateString,dateFormat,CultureInfo.InvariantCulture);
TimeSpan time = TimeSpan.ParseExact(timeString,timeFormat,CultureInfo.InvariantCulture);
DateTime finalDate = date.Date + time;
This is possible because you can add a DateTime and a TimeSpan value to get a new DateTime value
You can use TimeSpan.Parse to parse
DateTime newDateTime = date.Add(TimeSpan.Parse(time));
string d = DateTime.Now.Date.ToString("dd/MM/yyyy");
string t = DateTime.Now.ToString("h:mm");
var ts = TimeSpan.ParseExact(t, #"h\:mm",CultureInfo.InvariantCulture);
DateTime result = DateTime.ParseExact(d, "dd/MM/yyyy", CultureInfo.InvariantCulture)+ts;
Hope this helps,
Thanks.