How to find Serviceappointment by regardingobjectid

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  Hi Team,

       I would like to find the service appointment by regarding object id. I use below code for retrieve the record. Record is exists in crm but cannot find the record. It always return null.

      What wrong my code?

  I'm still using CRM 4.0.

  _beEntityCollection = DynamicsEntities.GetBusinessEntityCollection(new AllColumns(), "serviceappointment", "regardingobjectid", new object[] { ((Key)_pdynentity.Properties["incidentid"]).Value });

  
  

  public static BusinessEntityCollection GetBusinessEntityCollection(ColumnSetBase _columnsetbase, string _entityname,
                                                       string _attributename, object[] _filterid)
          {
              // Create Service
              //CrmService _crmService = CrmWebServices.CrmServices();
              //ICrmService _crmService = CrmWebServices._ICrmService;
              ColumnSetBase _columnsetbases = _columnsetbase;
  
              ConditionExpression cond = new ConditionExpression();
              cond.AttributeName = _attributename;
              cond.Operator = ConditionOperator.Equal;
              cond.Values = _filterid;
  
              FilterExpression filter = new FilterExpression();
              filter.FilterOperator = LogicalOperator.And;
              filter.Conditions.AddRange(new ConditionExpression[] { cond });
              QueryExpression query = new QueryExpression();
              query.ColumnSet = _columnsetbases;
              query.Criteria = filter;
              query.EntityName = _entityname;
  
              RetrieveMultipleRequest _retrievemultiplerequest = new RetrieveMultipleRequest();
              _retrievemultiplerequest.ReturnDynamicEntities = true;
              _retrievemultiplerequest.Query = query;
              RetrieveMultipleResponse _retrievemultipleresponse = null;
              BusinessEntityCollection _businessentitycollection = null;
              CrmService _CrmServiceExe = null;
              ICrmService _ICrmServiceExe = null;
              // Get a new instance of the CRM service from the context
              try
              {
                  if (CrmWebServices._CrmService != null)
                  {
                      _CrmServiceExe = CrmWebServices._CrmService;
                      _retrievemultipleresponse = (RetrieveMultipleResponse)_CrmServiceExe.Execute(_retrievemultiplerequest);
                  }
                  else
                  {
                      _ICrmServiceExe = CrmWebServices._ICrmService;
                      _retrievemultipleresponse = (RetrieveMultipleResponse)_CrmServiceExe.Execute(_retrievemultiplerequest);
                  }
                  _businessentitycollection = _retrievemultipleresponse.BusinessEntityCollection;
              }
              catch (SoapException soapex)
              {
                  XmlNode _xmlnode = soapex.Detail.SelectSingleNode("//error//code");
                  if (_xmlnode.InnerText == "0x80040217")
                      return null;
                  else throw new ApplicationException(soapex.Detail.InnerText, soapex);
              }
              catch (System.NullReferenceException ex)
              {
                  throw new NullReferenceException("An error has occurred in the Service Appointment", ex);
              }
              return _businessentitycollection;
          }

  Regards,

  Yukon

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  Thursday, December 26, 2013 1:39 PM