实体框架中已添加具有相同密钥的项目

Question

我有2个外键的表。当我试图插入重复值（对于外键）时，它给erroe说“已经添加了具有相同键的项目”

下面是我的代码

CheckListTrack CheckListtrack = new CheckListTrack();
trackId = entityCollection.WorkItemTrack.Max(p => p.TrackID) ;
foreach (int ListID in tracklist)
{
    CheckListtrack.WorkItemTrackReference.EntityKey = new EntityKey("SEIESSEntities.WorkItemTrack", "TrackID", trackId);   // foreign key

    CheckListtrack.CheckListReference.EntityKey = new EntityKey("SEIESSEntities.CheckList", "CheckListID", ListID);     // foreign key

    entityCollection.AddToCheckListTrack(CheckListtrack); // error comes after second time control passes here

    }
    curentScope.Complete();
    success = true;

请帮帮我

Answer 1

错误在于您将同一实体多次放入实体集合中。您必须在foreach循环中创建新的CheckListTrack（）实体。我猜CheckListTrack有自己的主键自动增量？