EF LINQ '凡' 有2场在同一时间

Question

我有如下表：

id    (bigint) 
adId   (bigint) 
listId   (bigint) 
listFieldValue (bigint) 

而且我有这样的搜索列表：

List<long> searchListFieldValues = new List<long>(); 
searchListFieldValues.Add(100); 
searchListFieldValues.Add(200); 

于是我就用：

using (ClearWhiteDBEntities cwContext = new ClearWhiteDBEntities()) 
{ 
    var adsWithRelevantadFields = 
     from adField in cwContext.tblAdFields 
     join ads in cwContext.tblAds on adField.adId equals ads.id 
     group adField by adField.adId into adAdFields 
     where searchListFieldIds.All(i => adAdFields.Select(co => co.listFieldValue).Contains(i)) 
     select adAdFields.Key; 

    MessageBox.Show(adsWithRelevantadFields.Count().ToString()); 
} 

但现在我需要同时检查两个字段listId和listFieldId，所以我创建了另一个搜索列表：

List<long> searchListIds = new List<long>(); 
searchListIds.Add(11); 
searchListIds.Add(12); 

现在我需要把所有adId有（listId == 11 && listFieldValue==100）和（listId == 12 && listFieldValue==200）

我想：

where searchListIds.All(i => adAdFields.Select(co => co.listId).Contains(i)) 
    && searchListFieldValues.All(i => adAdFields.Select(co => co.listFieldValue).Contains(i)) 

但它不工作。任何解决方案

Answer 1

如何将where子句放在group之前？

var adsWithRelevantadFields = 
    from adField in cwContext.tblAdFields 
    join ads in cwContext.tblAds on adField.adId equals ads.id 
    where ((adField.listId == 11 && adField.listFieldValue == 100) 
     || (adField.listId == 12 && adField.listFieldValue == 200) 
    group adField by adField.adId into adAdFields 
    select adAdFields.Key;