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Exchange Web Services - FindItem restriction using date/time works in US, fails in UK

• Wednesday, October 28, 2009 6:51 PMMightyMouseLDH

   
  

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  Hello all, hoping I can get some assistance from anyone who's encountered this issue.
  
  I am using EWS/VB.NET and a restriction to search for emails within a specific date range.  When the locale is set to "English (US)" the code works just fine.  When I move the application to a machine with a locale set to "English (UK)" the FindItem call fails with the error:  "Object reference not set to an instance of an object".
  
  I am using a DateTimePicker control, and pass the value to a variable.  Then, in my code which builds the request I convert this Date/Time value to a UTC formatted string:
  
  

                          ' Add the search criteria
  
                          Dim StartDateReceivedField As New PathToUnindexedFieldType()
  
                          StartDateReceivedField.FieldURI = UnindexedFieldURIType.itemDateTimeReceived
  
  
  
                          Dim StartDateReceivedToGet As New ConstantValueType()
  
  
  
                          StartDateReceivedToGet.Value = EndDate.ToUniversalTime().ToString()
  

  
  Again, this works flawlessly on systems set for "English (US)".  The main difference here is that in the US the format is MM/DD/YYYY, whereas in the UK it's DD/MM/YYYY.  Wouldn't the "ToUniversalTime()" .NET function convert this correctly?
  
  Any help here would be appreciated.
  
  Thank you in advance,
  
  Chris
  
  
  
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