投的IList <int>到IList的<string>

Question

代碼在我EFService：

private IDbSet<Item> _Items; 
    private int _SearchTakeCount = 10; 
    public IList<string> SearchByArticleCount(int articleCount) 
     { 
      return _Items.AsNoTracking().Where(m => m.Articles.Count().Equals(articleCount)) 
       .Take(_SearchTakeCount) 
       .Select(m => m.Articles.Count().ToString()) 
       .Distinct() 
       .ToList(); 
     } 

代碼在我的控制器：

public virtual ActionResult AutoCompleteSearch(string term, KeywordSearchBy searchBy = KeywordSearchBy.Name) 
     { 
      IList<string> data = new List<string>(); 
     switch (searchBy) 
     { 
      case ItemSearchBy.Name: 
       data = _ItemService.SearchByName(term); 
       break; 
      case ItemSearchBy.ArticleCount: 
       int articleCount = Convert.ToInt32(term); 
       data = _ItemService.SearchByArticleCount(articleCount); 
       break; 
     } 

當我運行異常計提壞賬項目

。 此例外是： LINQ to Entities不能識別方法'System.String ToString（）'方法，並且此方法不能轉換爲存儲表達式。

Answer 1

讓ToString()呼叫作爲LINQ到對象的查詢，EF部分完成後：

public IList<string> SearchByArticleCount(int articleCount) 
{ 
    return _Items.AsNoTracking().Where(m => m.Articles.Count().Equals(articleCount)) 
     .Take(_SearchTakeCount) 
     .Select(m => m.Articles.Count()) 
     .Distinct() 
     .AsEnumerable() 
     .Select(x => x.ToString()) 
     .ToList(); 
}