JavaScriptSerializer is subtracting one day from date
c#-4.0, datetime, javascriptserializer
Solution
It's not losing a day arbitrarily, it's converting to a UTC date (or I should say using the date in a UTC date format) so when it's unserialized it you're no longer within your personal time zone. It's basically performing:
DateTime whateverDate = /* incoming date */;
long ticks = whateverDate.ToUniversalTime() // make UTC
.Subtract(new DateTime(1970, 1, 1)) // subtract UNIX Epoch
.TotalMilliseconds(); // get milliseconds since then
// push in to the "\/Date(ticks)\/" format
String value = String.Format(@"\/Date({0})\/", ticks);
However, try the following:
// or you rely on it serializing, then bring it back to your own local time
// (apply the time zone).
afterDeserialize = afterDeserialize.ToLocalTime();
You'll now have the UTC time back to your local time (with time zone applied).
To Pass your test:
DateTime startDate = new DateTime(2012,1,20);
JavaScriptSerializer serializer = new JavaScriptSerializer();
String serializeDate = serializer.Serialize(startDate);
DateTime afterDeserialize = serializer.Deserialize<DateTime>(serializeDate)
.ToLocalTime(); // Note: this is added
Assert.Equals(startDate, afterDeserialize); // pass!
Problem
I am using `JavaScriptSerializer` for serializing DateTime, but when I deserialize it show one day less from the date it get serialize: Here is test: ``` DateTime startDate=new DateTime(2012,1,20);//set the 20th of January JavaScriptSerializer serializer=new JavaScriptSerializer(); string serializeDate= serializer.Serialize(startDate); DateTime afterDeserialize= serializer.Deserialize<DateTime>(serializeDate);//I get 19th of Jan Assert.Equals(startDate, afterDeserialize); ``` firstly I thougt it because of javascript datetime format but as I know for javascript Month is zero index `0=January`, but I am getting one day less than the original date.