linq到條件發出的實體

Question

我試圖列出滿足條件＃1或＃2的所有行，並返回＃1和＃2的兩行。 但問題是僅返回滿足一個條件（＃1或＃2）的行。

    var query = (from c in context.Tasks where 
                && ((c.FK_PrivacyID == 1 && c.Fk_TaskFollowerTypeID == 1)  
                 || (c.TaskFollower == FK_userID && c.Fk_TaskFollowerTypeID == 2))
                  orderby c.CreatedDate descending
                  orderby c.LastModificationDate descending 
                  select c)).ToList();

感謝任何幫助。

Answer 1

您需要條件1而不是條件2->（condition1）&&！（condition2）

var query = (from c in context.Tasks where 
                ((c.FK_PrivacyID == 1 && c.Fk_TaskFollowerTypeID == 1)  
                 && !(c.TaskFollower == FK_userID && c.Fk_TaskFollowerTypeID == 2))
                  orderby c.CreatedDate descending
                  orderby c.LastModificationDate descending 
                  select c).ToList();

Answer 2

嘗試在where子句和不必要的括號后加上第一個“ &&”

    var query = (from c in context.Tasks where 
            (c.FK_PrivacyID == 1 && c.Fk_TaskFollowerTypeID == 1)  
             || (c.TaskFollower == FK_userID && c.Fk_TaskFollowerTypeID == 2)
              orderby c.CreatedDate descending
              orderby c.LastModificationDate descending 
              select c)).ToList();