如何修复“对象引用未设置为对象实例”？

Question

我已经用C＃创建了Web服务，并且需要使用PHP创建一个客户端。由于无法从PHP连接和使用Web服务中的函数和方法，因此我用C＃创建了自己的Web服务，并且我可以管理几乎所有方法而没有问题。我可以使用所有将数据作为列表返回并在PHP中将其用作数组的方法。我无法做的是，我需要发送一些数据并将其保存在供Web Service使用的数据库中。

我可以成功发送所有必要的数据，但是当我打电话时

ServisSonucOfDenetimKayitSonuc8Zb117hL denkayit = badsClient.AsansorDenetimKayit(dkayit); 

保存方法给了我

<br>badsClient.AsansorDenetimKayit[FaultException] kod: Client<br>FaultException message: Object reference not set to an instance of an object.<br>FaultException reason: Object reference not set to an instance of an object.<br>FaultException Action: 
Server stack trace: 
   konum: System.ServiceModel.Channels.ServiceChannel.HandleReply(ProxyOperationRuntime operation, ProxyRpc& rpc)
   konum: System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs, TimeSpan timeout)
   konum: System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCallMessage methodCall, ProxyOperationRuntime operation)
   konum: System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message)
Exception rethrown at [0]: 
   konum: System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
   konum: System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
   konum: WebServiceApp.AsansorDenetimServis.IBstbAsansorDenetimServis.AsansorDenetimKayit(DenetimKayit denetimKayit)
   konum: WebServiceApp.AsansorDenetimServis.BstbAsansorDenetimServisClient.AsansorDenetimKayit(DenetimKayit denetimKayit)
   konum: WebServiceApp.WebService.MuayeneKayit(String jsonArry)

调试时，我可以看到发送到该方法的所有数据，并且可以在断点行上看到它们。

serviceConnect(username, password);



        [WebMethod]
        public void serviceConnect(string usr, string pwd)
        {
            try
            {
                BstbAsansorDenetimServisClient Client = new BstbAsansorDenetimServisClient();

                //var myEndpointBehavior = new SimpleEndpointBehavior();

                //client.Endpoint.Behaviors.Add(myEndpointBehavior);
                Client.ClientCredentials.UserName.UserName = usr;
                Client.ClientCredentials.UserName.Password = pwd;

                var basicHttpBinding = new BasicHttpBinding(
                              BasicHttpSecurityMode.TransportWithMessageCredential);
                basicHttpBinding.Security.Message.ClientCredentialType =
                                                     BasicHttpMessageCredentialType.UserName;
                badsClient = Client;
            }
            catch (FaultException<ServiceException> fe)
            {
                string hata = "TumIlleriSorgula[FaultException]: " + fe.Detail.Message +
                    "\r\nTumIlleriSorgula[FaultException]: " + fe.Detail.DebugInfo +
                    "\r\nTumIlleriSorgula[FaultException]: " + fe.Code.Name;
                System.Diagnostics.Debug.WriteLine(hata);
            }
            catch (Exception se)
            {
                string hata = "TumIlleriSorgula[FaultException]: " + se.Message +
                    "\r\nTumIlleriSorgula[FaultException]: " + se.InnerException +
                    "\r\nTumIlleriSorgula[FaultException]: " + se.Source;
                System.Diagnostics.Debug.WriteLine(hata);
            }
        }

 sonuc += dkayit.DenetimKayitDetayAsansorBilgi[0].KimlikNumarasi;
                        sonuc += dkayit.DenetimKayitDetayBakimSozlesme[0].TseBelgeDurum;
                        sonuc += dkayit.DenetimKayitDetayBinaSorumlusuBilgileri[0].BinaSorumluAdSoyad;
                        sonuc += dkayit.DenetimKayitDetayFirmaBilgi[0].BakimFirmaAd;
                        sonuc += dkayit.DenetimKayitDetaySoru[0].SoruSkala;
                        sonuc += dkayit.DenetimKayitDetayTechizatBilgi[0].DemirbasNo;
                        sonuc += dkayit.DenetimKayitSonuc[0].DenetimKayitId;
                        sonuc += dkayit.DenetimTarih;
                        sonuc += "<br>[badsClient.AsansorDenetimKayit] [CommunicationState]: Current state: <br>" + badsClient.State.ToString();

                        ServisSonucOfDenetimKayitSonuc8Zb117hL denkayit = badsClient.AsansorDenetimKayit(dkayit); --> where I am getting error...

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