I have a map table (tblUserRoles) which can contain multiple records. When i insert only one record using L2E it saves but when try to save multiple records it gives exception. I am saving like this:
foreach (tblUserRoles u in InsertUserRole)
{
EntityHelperUtil.AddObject(context, "tblUserRoles", (IEntityWithRelationships)u);
}
context.SaveChanges();
I am using a utility class of EntityHelperUtil from(http://bernhardelbl.spaces.live.com/blog/cns!DB54AE2C5D84DB78!238.entry) Here is the exception:
AttachSingleObject(System.Object, System.Data.Metadata.Edm.EntitySet, System.String)---An object with the same key already exists in the ObjectStateManager. The ObjectStateManager cannot track multiple objects with the same key.
at System.Data.Objects.ObjectContext.AttachSingleObject(Object entity, EntitySet entitySet, String argumentName)
at System.Data.Objects.DataClasses.RelatedEnd.AddEntityToObjectStateManager(IEntityWithRelationships entity, Boolean doAttach)
at System.Data.Objects.DataClasses.RelatedEnd.AddGraphToObjectStateManager(IEntityWithRelationships entity, Boolean relationshipAlreadyExists, Boolean addRelationshipAsUnchanged, Boolean doAttach, HashSet`1 promotedEntityKeyRefs)
at System.Data.Objects.DataClasses.RelatedEnd.IncludeEntity[U](U entity, Boolean addRelationshipAsUnchanged, Boolean doAttach, HashSet`1 promotedEntityKeyRefs)
at System.Data.Objects.DataClasses.EntityCollection`1.Include(Boolean addRelationshipAsUnchanged, Boolean doAttach, HashSet`1 promotedEntityKeyRefs)
at System.Data.Objects.DataClasses.RelationshipManager.AddRelatedEntitiesToObjectStateManager(Boolean doAttach)
at System.Data.Objects.ObjectContext.AttachTo(String entitySetName, Object entity)
at System.Data.Objects.ObjectContext.Attach(IEntityWithKey entity)
at HealthSphereServices.EntityHelperUtil.AddRelationships(ObjectContext context, List`1 map) in E:\E_Drive data\ORB\ORB_Development\ControlRoom\ControlRoom\HealthSphereServices\EntityHelperUtil.cs:line 158