linq .ToList（）返回所有記錄，忽略where子句？

Question

下面的linq查詢顯示我所有的結果集，而不是用where子句過濾premalink.PremalinkID == id ???

lstpremalink = dalpremalink.GetUserNewsFeed(UserID); 
var premalinkid = (from p in lstpremalink select p.PremalinkID).Distinct(); 

    foreach (Int64 id in premalinkid) 
    { 
    lstprema = (from premalinktags in lstpremalink 
        where premalinktags.PremalinkID == id 
        select premalinktags).ToList(); 
} 

lstprema顯示所有的結果集以下

Answer 1

lstprema = (from premalinktags in lstpremalink 
      where premalink.PremalinkID == id select premalinktags).ToList(); 

你迭代通過premalinktags但你where子句不包含該變量！應該不是premalinktags.PremalinkID == id而是？

Answer 2

lstpremalink = dalpremalink.GetUserNewsFeed(UserID); 

var premalinkid = (from p in lstpremalink 
        where p.PremalinkID == lstpremaLink.ID 
        select p).Distinct(); 

您必須使用WHERE條件