如何将两个模型列表组合到一个模型中

时间:2012-11-07 15:39:35

标签: c# asp.net-mvc-3 linq entity-framework lambda

请参阅以下代码:

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);
}

任何人都可以建议将两个模型组合成一个模型的最佳方法,即NewsFilterModel?

我想要实现的目标是:

NewsFilterModelList

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

我的结尾如下:

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();

任何人都有更好的想法,请指教。

2 个答案:

答案 0 :(得分:1)

您可以使用Union来组合结果集

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
    ;

答案 1 :(得分:0)

显然,您的CtArticleDetailPcPage没有任何关系,因此您需要更改模型。

public class NewsFilterModel
{
    public IEnmerable<CtArticleDetail> ArticleDetails { get; set; }

    public IEnmerable<PcPage> Pages { get; set; }
}

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

     var newsFilterModel = new NewFilterModel { ArticleDetails = resultArticle, Pages = resultPage };
     return newsFilterModel;
}