I'm trying to set LongTimePattern property of CurrentCulture with the following code:
System.Threading.Thread.CurrentThread.CurrentCulture.DateTimeFormat.LongTimePattern = "HH:mm:ss";
and I'm getting InvalidOperationException: Instance is read-only.
Any idea how can I change it? I want to force LongTimePattern to show 24h format for any culture.
If you change the System.Threading.Thread.CurrentThread.CurrentCulture then it will automatically update the LongTimePattern.
You can't make any updation in current assigned culture info but create a new one and assign it to current culture.
System.Globalization.CultureInfo c = new System.Globalization.CultureInfo("es-ES");
c.DateTimeFormat.LongTimePattern = "h-mm-ss";
Thread.CurrentThread.CurrentCulture = c;
If you just want to change ONE or TWO values and keep the rest the same, you can use Clone to get a writable copy of the current culture, eg:
CultureInfo i;
i = (CultureInfo)Thread.CurrentThread.CurrentCulture.Clone();
i.DateTimeFormat.LongTimePattern = "HH:mm:ss";
i.DateTimeFormat.ShortTimePattern = "HH:mm";
Thread.CurrentThread.CurrentCulture = i;
i = (CultureInfo)Thread.CurrentThread.CurrentUICulture.Clone();
i.DateTimeFormat.LongTimePattern = "HH:mm:ss";
i.DateTimeFormat.ShortTimePattern = "HH:mm";
Thread.CurrentThread.CurrentUICulture = i;
This seems better than having to use a culture string to get your starting culture.
I'm not sure if you can change the cultures, allowing you to do so would defeat the purpose of having cultures in the first place - they should show the date and time in the commonly accepted format used by that culture.
If you wish to show a different format, then you can always use a custom date/time formatter.
See http://msdn.microsoft.com/en-us/library/az4se3k1.aspx for all available pre-set formats, and details on how to display your own format.
