ODP.NET

Hi:

I am using WCF Data Service and Oracle

EF Provider is ODAC11.2 Release 4

Wcf Data Service fails when more than 8 properties are specified in the 'select=' portion of the URI

here is my code

var q = from c in this.ctx.SALESORDER_ITEM
select new
{
c.SORDERDETAILID,
c.IID,c.DMFLAG,c.OWNERID,c.SKUID,c.SKU_ID,c.TRADENO,c.SOURCEID,c.SORDERID
};

excetion:

InvalidOperationException: An error occurred for this query during batch execution. See the inner exception for details

The inner exception is null, but the DataServiceClientException states: Value cannot be null Parameter name: value

the exception is thrown in base.OnStartProcessingRequest(args) method (overridden).

Here is the call stack as well:

at System.Data.Services.WebUtil.CheckArgumentNull[T](T value, String parameterName)

at System.Data.Services.Internal.ProjectedWrapper.set_PropertyNameList(String value)

at lambda_method(Closure , Shaper )

at System.Data.Common.Internal.Materialization.Coordinator`1.ReadNextElement(Shaper shaper)

at System.Data.Common.Internal.Materialization.Shaper`1.SimpleEnumerator.MoveNext()

at System.Data.Services.Internal.ProjectedWrapper.EnumeratorWrapper.MoveNext()

at System.Data.Services.DataService`1.SerializeResponseBody(RequestDescription description, IDataService dataService)

at System.Data.Services.DataService`1.HandleNonBatchRequest(RequestDescription description)

at System.Data.Services.DataService`1.HandleRequest()


Is there a max number of properties in $select statement

I think may be it is oracle provider's problem ,but i don't konw how to debug it Can anyone help me

Any help is greatly appreciated