Question

If I have a page class that returns an IQueryable result set like:

protected virtual IQueryable<EntityResult> GetEntities(ETBDataContext pContext)
    {
        return from e in pContext.Entities
               where e.SectionId == SectionId && e.StatusCode == "Published"
               orderby e.PublishDate descending
               select new EntityResult
               {
                   EntityId = e.Id,
                   Excerpt = e.Excerpt,
                   Name = e.Name,
                   PublishDate = e.PublishDate,
                   ShortDescription = e.ShortDescription
               };
    }

If I call this method in a inherited class, How can I clear the select and just get the ShortDescription?

public void IQueryable<EntityResult> GetResult(ETBDataContext pContext)
{
    IQueryable<EntityResult> pQuery = base.GetEntities(pContext);

    //right here: how can I just return the ShortDescription Only?

    return pQuery;
}

I am using the default GetEntities() to do the standard select operation for default queries, but on some calls I would like to get just the specific data that I need.

Is this possible? are there other ways? Thanks in advance!!

Answer 1

You can try

pQuery = pQuery.Select(e => new EntityResult { 
    ShortDescription = e.ShortDescription 
});

I’m pretty sure that this won’t select the other columns.