Question

嗨我正在尝试通过WCF获取顾问列表，因为我收到标题中提到的这个错误所以我会在调试时告诉你所有代码，这样你就会得到跟踪错误的地方，

因为我在负载上运行表单，

    private void LoadData()
    {
        try
        {
            CIService.CIServiceClient serv = new CIServiceClient();
            serv.GetConsultantListCompleted += new EventHandler<GetConsultantListCompletedEventArgs>(serv_GetConsultantListCompleted);
            serv.GetConsultantListAsync();
            serv.Close();
        }
        catch (Exception ex)
        {
            string error = "<script language=javascript>alert('Failed to Load Consultants at PageLoad \r\n" + ex.StackTrace + "');</script>";
            if (!ClientScript.IsClientScriptBlockRegistered("ConLoadErr"))
                ClientScript.RegisterClientScriptBlock(Page.GetType(), "ConLoadErr", error);  
        }
    }

 public ConsultantService():base(connectionString)
        {

        }

    public DataAccessBase(string connectionString)
        {
            this.sqlCommand = new SqlCommand();
            this.sqlConnection = new SqlConnection(connectionString);
            this.sqlCommand.Connection = this.sqlConnection;
            this.commandType = System.Data.CommandType.Text;
        }

  List<Consultant> ICIService.GetConsultantList()
        {
            ConsultantService service = new ConsultantService();
            return service.GetConsultantList();
        }

    public List<Consultant> GetConsultantList()
        {
            DataAccessManager.SystemSetup sysSetup = new SystemSetup();
            return sysSetup.GetConsultantList();
        }

 public List<Consultant> GetConsultantList()
        {
            InspectionEntities dbContext = new InspectionEntities();
            return dbContext.Consultants.ToList();
        }

    public InspectionEntities() : 
                base("name=InspectionEntities", "InspectionEntities")
        {
            this.OnContextCreated();
        }

  public List<Consultant> GetConsultantList()
        {
            InspectionEntities dbContext = new InspectionEntities();
            return dbContext.Consultants.ToList();
        }

再次返回时，它会在“return dbContext.Consultants.ToList（）;”

上给出错误

Inner Exception ({"A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)"})

和

Stack Trace

   at System.Data.EntityClient.EntityConnection.OpenStoreConnectionIf(Boolean openCondition, DbConnection storeConnectionToOpen, DbConnection originalConnection, String exceptionCode, String attemptedOperation, Boolean& closeStoreConnectionOnFailure)
   at System.Data.EntityClient.EntityConnection.Open()
   at System.Data.Objects.ObjectContext.EnsureConnection()
   at System.Data.Objects.ObjectQuery`1.GetResults(Nullable`1 forMergeOption)
   at System.Data.Objects.ObjectQuery`1.System.Collections.Generic.IEnumerable<T>.GetEnumerator()
   at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)
   at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source)
   at DataAccessManager.SystemSetup.GetConsultantList() in G:\Design Scoring\DataAccessManager\SystemSetup.cs:line 42
   at InspectionServices.ConsultantService.GetConsultantList() in G:\Design Scoring\InspectionServices\Services\ConsultantService.cs:line 112
   at InspectionServices.CIService.InspectionServices.ICIService.GetConsultantList() in G:\Design Scoring\InspectionServices\CIService.cs:line 253
   at SyncInvokeGetConsultantList(Object , Object[] , Object[] )
   at System.ServiceModel.Dispatcher.SyncMethodInvoker.Invoke(Object instance, Object[] inputs, Object[]& outputs)
   at System.ServiceModel.Dispatcher.DispatchOperationRuntime.InvokeBegin(MessageRpc& rpc)

希望你的建议

由于

已编辑：还有一件事我想在其他形式的应用程序中提到我从数据库中获取数据而没有任何错误

底层提供程序在使用WCF打开时失败了？

0 个答案: