c# - Retrieve "null values" from OrganizationServiceContext -


i having problem retrieving empty columns "null values" in crm 2011 using c# , organizationservicecontext.createquery method. code below. problem subtype. when null error: "object not set instance of object". can please assist?

    public list<opportunities> getopportunitieslist()     {         using (_orgservice = new organizationservice(connection))         {             organizationservicecontext context = new organizationservicecontext(_orgservice);             // create linq query.             datetime getdate = datetime.now.adddays(-3);             var query = (from r in context.createquery<opportunity>()                          join c in context.createquery<contact>() on r.contactid.id equals c.contactid                              rc                          z in rc.defaultifempty()                          r.createdon > getdate && r.new_type.value != null                          orderby r.contactid                          select new opportunities                          {                              opporunity = r.new_opportunitynumber,                              //region =getaccountregionsbyid(a.new_region.value),                                accountid = r.customerid.id,                              topic = r.name,                              status = r.statecode.value.tostring(),                              pcustomer = r.customerid.name,                              estreve = (decimal)r.estimatedvalue.value,                              owner = r.ownerid.name,                              salesstagecode = r.salesstagecode.value,                              pipelinephase = r.stepname,                              opptype = getalloptionsetvalues(r.logicalname, "new_sf_recordtype", r.new_sf_recordtype.value),                              subtype = getalloptionsetvalues(r.logicalname, "new_type", r.new_type.value == null ? default(int) : r.new_type.value),                              estclosedate = r.estimatedclosedate.value,                              actualrev = (microsoft.xrm.sdk.money)r.actualvalue,                              probability = r.closeprobability.value,                              weighedrev = (decimal)r.new_weightedvalue.value,                              email = z.emailaddress1,                              createdon = r.createdon.value,                              modifiedby = r.modifiedby.name,                               modifiedon = r.modifiedon.value                          }).tolist();             foreach (opportunities o in query)             {                 o.region = (from d in context.createquery<account>() d.accountid == o.accountid select getalloptionsetvalues(d.logicalname, "new_region", d.new_region.value)).firstordefault();              }             return query;         }     }

i'm guessing r.new_type optionsetvalue. you'll need check null instead of value being null. try this:

public list<opportunities> getopportunitieslist() {     using (_orgservice = new organizationservice(connection))     {         organizationservicecontext context = new organizationservicecontext(_orgservice);         // create linq query.         datetime getdate = datetime.now.adddays(-3);         var query = (from r in context.createquery<opportunity>()                      join c in context.createquery<contact>() on r.contactid.id equals c.contactid                          rc                      z in rc.defaultifempty()                      r.createdon > getdate && r.new_type != null                      orderby r.contactid                      select new opportunities                      {                          opporunity = r.new_opportunitynumber,                          //region =getaccountregionsbyid(a.new_region.value),                            accountid = r.customerid.id,                          topic = r.name,                          status = r.statecode.value.tostring(),                          pcustomer = r.customerid.name,                          estreve = (decimal)r.estimatedvalue.value,                          owner = r.ownerid.name,                          salesstagecode = r.salesstagecode.value,                          pipelinephase = r.stepname,                          opptype = getalloptionsetvalues(r.logicalname, "new_sf_recordtype", r.new_sf_recordtype.value),                          subtype = getalloptionsetvalues(r.logicalname, "new_type", r.new_type == null ? default(int) : r.new_type.value),                          estclosedate = r.estimatedclosedate.value,                          actualrev = (microsoft.xrm.sdk.money)r.actualvalue,                          probability = r.closeprobability.value,                          weighedrev = (decimal)r.new_weightedvalue.value,                          email = z.emailaddress1,                          createdon = r.createdon.value,                          modifiedby = r.modifiedby.name,                           modifiedon = r.modifiedon.value                      }).tolist();         foreach (opportunities o in query)         {             o.region = (from d in context.createquery<account>() d.accountid == o.accountid select getalloptionsetvalues(d.logicalname, "new_region", d.new_region.value)).firstordefault();          }         return query;     } }

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