C# Date time object with 24 hour format Without Am PM

Question

I am trying to set the DateTime format to 24 hours. Originally I have a string with a 12 hour representation. All solutions I have found are converting DateTime to string.

string dateString = "Mon 16 Jun 8:30 AM 2008"; // <-- Valid
        string format = "dd/MM/yyyy HH:mm";
        DateTime dateTime;
        if (DateTime.TryParseExact(dateString, format, CultureInfo.InvariantCulture,
            DateTimeStyles.RoundtripKind, out dateTime))
        {
            DateTime dateIn24 = dateTime;//  dateIn24 should be in 24 hour format
        }

Is there anything we can do in web.config ? Like the following:

    <globalization fileEncoding="utf-8" requestEncoding="utf-8" responseEncoding="utf-8" culture="en-GB" uiCulture="en-GB"/>

i got the answer

Thread.CurrentThread.CurrentCulture = new CultureInfo("en-GB"); if its en-US 12 hour format by default it will be en-US based on system date time settings

Answer 1

The DateTime instance only contains the information, and the Hour property is an integer from 0 to 23, according to MSDN documentation:

Property Value

Type : System.Int32

The hour component, expressed as a value between 0 and 23.

https://msdn.microsoft.com/library/system.datetime.hour(v=vs.110).aspx

If you're talking about formatting it, then you need to convert it to a string, like mentioned in the comments.

Answer 2

As far as I know, the 24-hour format is neither not a matter of how the DateTime is parsed, nor saved, but rather of the formatting. Given that you enter the if -block (I have not been successful on parsing youre dateString in LinqPad) you can obtain a correctly formatted date string with

var dateStringWith24Hours = dateTime.ToString(dateString);

since the HH in your format string means that you'd like to format the hours as 24 hours.