剛開(kāi)始學(xué)習(xí)EF，在閱讀別人代碼的時(shí)候看到導(dǎo)航屬性，網(wǎng)上沒(méi)有找到關(guān)于導(dǎo)航屬性的詳細(xì)說(shuō)明，只知道是設(shè)置多表關(guān)聯(lián)的，代碼如下/// <summary>/// /// </summary>[XmlIgnoreAttribute()] [SoapIgnoreAttribute()] [DataMemberAttribute()] [EdmRelationshipNavigationPropertyAttribute("Gift163DBModel", "FK_PRODUCTT_REFERENCE_PRODUCTT", "ProductTypes1")]public EntityCollection<ProductTypes> ProductTypes1 {get{return ((IEntityWithRelationships)this).RelationshipManager.GetRelatedCollection<ProductTypes>("Gift163DBModel.FK_PRODUCTT_REFERENCE_PRODUCTT", "ProductTypes1"); }set{if ((value != null)) { ((IEntityWithRelationships)this).RelationshipManager.InitializeRelatedCollection<ProductTypes>("Gift163DBModel.FK_PRODUCTT_REFERENCE_PRODUCTT", "ProductTypes1", value); } } }數(shù)據(jù)庫(kù)表中沒(méi)有ProductTypes1這個(gè)字段，請(qǐng)問(wèn)這段代碼是EF自動(dòng)生成的還是手寫(xiě)的呢？調(diào)用代碼如下public ActionResult LeftTree() {var items = _ProductTypesBLL.Get().Where(a=>a.ProductTypes2.Name.Equals("按地域分")).Take(11);return View(items); }