C# Datetime to "Yyyymmddhhmmss" Format

C# DateTime to YYYYMMDDHHMMSS format

DateTime.Now.ToString("yyyyMMddHHmmss"); // case sensitive

How to get DateTime in yyyymmddhhmmss

You can use

string strDate = DateTime.Now.ToString("yyyyMMddhhmmss");

If 24hr format is required that use uppercase HH inplace of hh in the format string.

Remember the first MM should be in upper case as lower case mm is for minutes where as uppercase is for Month.

For your particular case instead of writing a new method you can do:

new XAttribute("SLOTTINGTIME",slottingmessage.SlottingDateTime.ToString("yyyyMMddhhmmss")),

One more thing to add: The output will contain Hour in 12 hours format because of the lower case hh part in the string. Not really sure if you need that because without AM/PM this can't indicate the accurate time. For that purpose use HH for hours which will display hours in 24 hour format. So your code could be:

new XAttribute("SLOTTINGTIME",slottingmessage.SlottingDateTime.ToString("yyyyMMddHHmmss")),
                                                                               //^^ for 24 hours format

How to check if a string in yyyyMMddHHmmss format in C#?

TryParse doesn't have overload to provide exact format, try using TryParseExact. Example:

// adjust IFormatProvider and DateTimeStyles if needed
if (DateTime.TryParseExact(
    timestampValue, 
    "yyyyMMddHHmmss", //format
    CultureInfo.CurrentCulture, 
    DateTimeStyles.None, out outDate))
{
    //do work
}

Convert String value format of YYYYMMDDHHMMSS to C# DateTime

Define your own parse format string to use.

string formatString = "yyyyMMddHHmmss";
string sample = "20100611221912";
DateTime dt = DateTime.ParseExact(sample,formatString,null);

In case you got a datetime having milliseconds, use the following formatString

string format = "yyyyMMddHHmmssfff"
string dateTime = "20140123205803252";
DateTime.ParseExact(dateTime ,format,CultureInfo.InvariantCulture);

Thanks

Convert DateTime to string with format YYYYMMDD

date.ToString("yyyyMMdd");

Should be what you need.

Format DateTime.Now to yyyy-mm-dd

According to msdn MM format specifier stands for month and mm - for minutes.

"mm" | The minute, from 00 through 59.

"MM" | The month, from 01 through 12.

So your code should look like the following:

    var dateString1 = DateTime.Now.ToString("yyyyMMdd");
    var dateString2 = DateTime.Now.ToString("yyyy-MM-dd");

    Console.WriteLine("yyyyMMdd " + dateString1);
    Console.WriteLine("yyyy-MM-dd "+ dateString2);

And you will get the desired result

Invalid date format error yyyymmddhhmmss in c#

use this yyyyMMddHHmmss. Because it's case sensitive

How to convert DateTime to/from specific string format (both ways, e.g. given Format is yyyyMMdd)?

if you have a date in a string with the format "ddMMyyyy" and want to convert it to "yyyyMMdd" you could do like this:

DateTime dt = DateTime.ParseExact(dateString, "ddMMyyyy", 
                                  CultureInfo.InvariantCulture);
dt.ToString("yyyyMMdd");

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