将ISO日期转换为.net DateTime时，Sitecore 8出现奇怪的行为

Question

I have an item with a field " Birthday ". The value is " 15/03/1977 " and the raw value is " 19770315T000000 ". I took example from here

Now the output of following code is:

var item = Sitecore.Context.Database.GetItem("{8935CD35-5EAD-4C8E-B85C-E95E9B1ED5C3}");
DateField dateField = (DateField)item.Fields["Birthdate"];
// DateTime object
var date = dateField.DateTime.Date;
 // String
lblTest.Text = date.ToString();

Output :

3/14/1977 12:00:00 AM // Instead of 15 here date is 14

If I format the string to " dd-MM-yyyy ":

 lblTest.Text = date.ToString("dd-MM-yyyy");

Output

 14-03-1977 

I don't know why I have this difference, the date saved is 15/03/1977 and the output is 14-03-1977 .

And second question is, in above code var date = dateField.DateTime.Date; I am assigning .Date to variable date but in the output I still see the time if no format is provided. I am talking about this lblTest.Text = date.ToString();

Answer 1

This may be because of the timezone added to the DateTime field raw values in Sitecore 8.

Similar problem described in this blog post: Sitecore 8 ServerTimeZone – my dates are all wrong

The new format contains Z at the end (eg 20160907T120740Z ) which is part of the ISO 8601 datetime standard for UTC times and indicates that that time is UTC.

I'm not 100% sure if this will help you but you can try:

Sitecore.DateUtil.ToServerTime(dateField.DateTime).ToString("dd-MM-yyyy");

Answer 2

And second question is, in above code var date = dateField.DateTime.Date; I am assigning .Date to variable date but in the output I still see the time if no format is provided. I am talking about this lblTest.Text = date.ToString();

The System.DateTime.Date property is still a DateTime object, just with the default value for the time fragment. You need to apply formatting if you want to lose the time fragment.