Question

Please see code below :

public class NewsFilterModel
{
    public CtArticleDetail ArticleDetail { get; set; }

    public PcPage Page { get; set; }
}

public IEnumerable<NewsFilterModel> GetNewsFilterModelByTagNames(string tagNames, int status)
{
     var resultArticle = db.CtArticleDetail.Where(m => m.tagNames == tagNames);
     var resultPage  = db.PcPage.Where(m => m.tagNames == tagNames);
}

Can anyone please advice what the best way to combine two model to one model which is NewsFilterModel ?

What I am trying to achieve is:

NewsFilterModelList

1.Article1
2.Page1
3.Article2
4.Page2
5.Article3
6.Page3

I’ve ended this like below:

foreach (var item in pageResult)
            {
                resultList.Add(new NewsFilterModel { ArticleDetail = null, Page = item, Date = item.UpdatedOn.ToDateTime() });
            }

            foreach (var item in tempArticleList)
            {
                resultList.Add(new NewsFilterModel { ArticleDetail = item, Page = null, Date = item.LiveDate.ToDateTime() });
            }

            return resultList.AsEnumerable();

Anyone has better idea, please advice.

Answer 1

You can use Union to combine the result sets

var query1 = db.CtArticleDetail
    .Where(a => a.tagNames.Equals(tagNames))
    .Select(a => new NewsFilterModel() { ArticleDetail = a, Page = null });
var query2 = db.PcPage
    .Where(a => a.tagNames.Equals(tagNames))
    .Select(a => new NewsFilterModel() { ArticleDetail = null, Page = a });
var query3 = query1.Union(query2)
    //.OrderBy(a => a.Date); -- Order here
    ;