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.NET Service Client DateTime Time Zone Offset Compatability Issue

I'm attempting to communicate with a Java webservice via a .NET application, using a Visual Studio Service reference (System.ServiceModel namespace classes). I've found that whenever it serializes a DateTime value it does not specify the offset. The problem is two fold:

I can't figure out how to create a DateTime object with a specific time zone. I can create a DateTimeOffset that will accomplish this, but the service client is expecting a DateTime object.
When the DateTime object is serialized, it does not include the time zone offset.
To elaborate on issue #2, the XML that the service expects for the timestamp object is as follows:

<startDate>2011-03-18T00:00:00-07:00</startDate>
<endDate>2011-03-19T00:00:00-07:00</endDate>

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However, the XML that I see when tracing the .NET app is as follows:

<startDate>2011-03-18T00:00:00</startDate>
<endDate>2011-03-19T00:00:00</endDate>

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The web service requires the time zone, because the underlying data is tracked in GMT-0. The data that is returned is in daily intervals, so if I don't specify a time zone then I get data back for GMT-0. Only when I provide the offset in the query do I get the in the data correct time zone.
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Ryan McCauley
Asked:
Ryan McCauley
1 Solution
 
Chad SmithSoftware EngineerCommented:
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lenordisteCommented:
You could try implementing a custom IClientMessageFormatter to alter the XML you are sending to the java service. This way you can still use a DateTime as forced by the java webservice API and programatically add timezone information on the fly before sending your request.

Here is a good read from a user who had the opposite problem you had (receiving timezone offset):
http://stackoverflow.com/questions/3067650/how-to-ignore-timezone-of-datetime-in-net-wcf-client

please note that he customizes the DeserializeReply method in order to strip timezone offset information while in your case you should work on the SerializeRequest method which he left intact.
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