internal static QDataDataContext CreateDataContext()
{
QDataDataContext newContext;
string ConnStr;
ConnStr = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
newContext = new QDataDataContext(ConnStr);
return(newContext);
}
public List <TEntityType> SaveEntities <TEntityType, TKeyType>(List <TEntityType> EntitiesToSave, string KeyFieldName)
{
List <TEntityType> EntitiesToPossiblyUpdate;
List <TEntityType> EntitiesToInsert;
List <TEntityType> HandledEntities = new List <TEntityType>();
bool TimeStampEntity;
Type ActualFieldType;
if (EntitiesToSave.Count > 0)
{
TimeStampEntity = Base.EntityContainsTimeStamp(typeof(TEntityType), ContextForUpdate);
ActualFieldType = EntitiesToSave.FirstOrDefault().GetPropertyType(KeyFieldName);
if (ActualFieldType != typeof(TKeyType))
{
throw new Exception("The UniqueFieldType[" + typeof(TKeyType).Name + "] specified does not match the actual field Type[" + ActualFieldType.Name + "]");
}
if (ActualFieldType == typeof(string))
{
EntitiesToPossiblyUpdate = EntitiesToSave.Where(ent => string.IsNullOrEmpty(ent.GetPropertyValue <string>(KeyFieldName)) == false).ToList();
EntitiesToInsert = EntitiesToSave.Where(ent => string.IsNullOrEmpty(ent.GetPropertyValue <string>(KeyFieldName)) == true).ToList();
}
else
{
EntitiesToPossiblyUpdate = EntitiesToSave.Where(ent => EqualityComparer <TKeyType> .Default.Equals(ent.GetPropertyValue <TKeyType>(KeyFieldName), default(TKeyType)) == false).ToList();
EntitiesToInsert = EntitiesToSave.Where(ent => EqualityComparer <TKeyType> .Default.Equals(ent.GetPropertyValue <TKeyType>(KeyFieldName), default(TKeyType)) == true).ToList();
}
if (EntitiesToPossiblyUpdate.Count > 0)
{
EntitiesToInsert.AddRange(ResolveUpdatesReturnInserts <TEntityType, TKeyType>(EntitiesToPossiblyUpdate, KeyFieldName));
HandledEntities.AddRange(EntitiesToPossiblyUpdate.Where(ent => EntitiesToInsert.Select(eti => eti.GetPropertyValue <TKeyType>(KeyFieldName)).Contains(ent.GetPropertyValue <TKeyType>(KeyFieldName)) == false));
}
if (EntitiesToInsert.Count > 0)
{
ContextForUpdate.GetTable(typeof(TEntityType)).InsertAllOnSubmit(EntitiesToInsert);
HandledEntities.AddRange(EntitiesToInsert);
}
ContextForUpdate.SubmitChanges();
ContextForUpdate = null;
return(HandledEntities);
}
else
{
return(EntitiesToSave);
}
}
public DisconnectedEntitySaver()
{
ContextForUpdate = Base.CreateDataContext();
}
internal static bool EntityContainsTimeStamp(Type EntityType, QDataDataContext CurrentContext)
{
return(CurrentContext.Mapping.MappingSource.GetModel(CurrentContext.GetType()).GetMetaType(EntityType).DataMembers.Where(dm => dm.IsVersion == true).FirstOrDefault() != null);
}
internal static string GetPrimaryKeyName(Type EntityType, QDataDataContext CurrentContext)
{
return((from m in CurrentContext.Mapping.MappingSource.GetModel(CurrentContext.GetType()).GetMetaType(EntityType).DataMembers where m.IsPrimaryKey == true select m.Name).FirstOrDefault());
}
internal static string GetTableName(Type EntityType, QDataDataContext CurrentContext)
{
return(CurrentContext.Mapping.GetTable(EntityType).TableName);
}
