“不支持指定的方法."在实体框架中

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这是我的实体类，列为

this is my entity class listed as

public partial class NerdDinnerEntities : ObjectContext { #region Constructors public NerdDinnerEntities(string connectionString) : base(connectionString, "NerdDinnerEntities") { try { ObjectContext oc = new ObjectContext(connectionString); oc.Connection.ChangeDatabase("NERDDINNER1"); oc.AcceptAllChanges(); this.ContextOptions.LazyLoadingEnabled = true; OnContextCreated(); } catch (Exception ex) { } } #endregion #region Partial Methods partial void OnContextCreated(); #endregion #region ObjectSet Properties /// /// No Metadata Documentation available. /// public ObjectSet Dinners { get { if ((_Dinners == null)) { _Dinners = base.CreateObjectSet("Dinners"); } return _Dinners; } } private ObjectSet _Dinners; /// /// No Metadata Documentation available. /// public ObjectSet RSVPs { get { if ((_RSVPs == null)) { _RSVPs = base.CreateObjectSet("RSVPs"); } return _RSVPs; } } private ObjectSet _RSVPs; /// /// No Metadata Documentation available. /// public ObjectSet sysdiagrams { get { if ((_sysdiagrams == null)) { _sysdiagrams = base.CreateObjectSet("sysdiagrams"); } return _sysdiagrams; } } private ObjectSet _sysdiagrams; #endregion #region AddTo Methods /// /// Deprecated Method for adding a new object to the Dinners EntitySet. Consider using the .Add method of the associated ObjectSet<T> property instead. /// public void AddToDinners(Dinner dinner) { base.AddObject("Dinners", dinner); } /// /// Deprecated Method for adding a new object to the RSVPs EntitySet. Consider using the .Add method of the associated ObjectSet<T> property instead. /// public void AddToRSVPs(RSVP rSVP) { base.AddObject("RSVPs", rSVP); } /// /// Deprecated Method for adding a new object to the sysdiagrams EntitySet. Consider using the .Add method of the associated ObjectSet<T> property instead. /// public void AddTosysdiagrams(sysdiagram sysdiagram) { base.AddObject("sysdiagrams", sysdiagram); } #endregion }

这是我的web.config文件，

and these is my web.config file as

<add name="NerdDinnerEntities" connectionString="metadata=res://*/Models.NerdDinner.csdl|res://*/Models.NerdDinner.ssdl|res://*/Models.NerdDinner.msl;provider=System.Data.SqlClient;provider connection string=&quot;Data Source=@;Database=NERDDINNER;User ID=@;Password=@@@;MultipleActiveResultSets=True&quot;" providerName="System.Data.EntityClients" />

我在这行中得到错误，因为

and i am getting error in this line as

oc.Connection.ChangeDatabase("NERDDINNER1");

不支持指定的方法. 我不知道该如何进行?您能否提出宝贵的建议?

Specified method is not supported. i do not know how to proceed can u give ur valuable sugessions

推荐答案

不支持意味着不支持.这意味着它还行不通. Not supported means not supported. It means it doesn''t work, yet.