ServiceEndpoint上具有约定'；IService1'；尝试访问wcf服务时缺少Transport

我正在尝试访问WCF服务。但它给了我以下错误：

约定为"IService1"的ServiceEndpoint上的CustomBinding缺少TransportBindingElement。每个绑定必须至少有一个从TransportBindingElement派生的binding元素。

描述：在执行期间发生未处理的异常当前web请求。请查看堆栈跟踪以了解更多信息有关错误的信息以及错误在代码中的来源。

异常详细信息：System.InvalidOperationException：CustomBinding在约定为"IService1"的ServiceEndpoint上缺少TransportBindingElement。每个绑定必须至少有一个绑定从TransportBindingElement派生的元素。

以下是我的服务模型完整配置：

<system.serviceModel>
<!-- change -->
<bindings>
  <customBinding>
    <binding name="Wrabind" closeTimeout="00:02:00" openTimeout="00:02:00">
      <transactionFlow />
      <security authenticationMode="SecureConversation" messageSecurityVersion="WSSecurity11WSTrustFebruary2005WSSecureConversationFebruary2005WSSecurityPolicy11BasicSecurityProfile10">
        <localClientSettings maxClockSkew="00:07:00" />
        <localServiceSettings maxClockSkew="00:07:00" />
        <secureConversationBootstrap messageSecurityVersion="WSSecurity11WSTrustFebruary2005WSSecureConversationFebruary2005WSSecurityPolicy11BasicSecurityProfile10">
          <localClientSettings maxClockSkew="00:30:00" />
          <localServiceSettings maxClockSkew="00:30:00" />
        </secureConversationBootstrap>
      </security>
      <textMessageEncoding />
      <httpTransport authenticationScheme="Anonymous" bypassProxyOnLocal="false" hostNameComparisonMode="StrongWildcard" proxyAuthenticationScheme="Anonymous" realm="" useDefaultWebProxy="true" />
    </binding>
  </customBinding>
</bindings>
<!-- change -->
<services>
  <service behaviorConfiguration="WCFService.Service1Behavior"
      name="WCFService.Service1">
    <endpoint address="http://subdomain.domain.com/service1.svc" binding="customBinding"
        bindingName="Wrabind" contract="WCFService.IService1" />
    <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" />
  </service>
</services>
<behaviors>
  <serviceBehaviors>
    <behavior name="WCFService.Service1Behavior">
      <!-- To avoid disclosing metadata information, set the value below to false before deployment -->
      <serviceMetadata httpGetEnabled="false" />
      <!-- change -->
      <!--<serviceCredentials>
        <userNameAuthentication userNamePasswordValidationMode="Custom" customUserNamePasswordValidatorType="WrangleCoreService.Authentication.DistributorValidator, WrangleCoreService"/>
        <serviceCertificate findValue="WCFService" storeLocation="LocalMachine" storeName="TrustedPeople" x509FindType="FindBySubjectName"/>
      </serviceCredentials>-->
      <!-- change -->
      <!-- To receive exception details in faults for debugging purposes, set the value below to true.  Set to false before deployment to avoid disclosing exception information -->
      <serviceDebug includeExceptionDetailInFaults="false" />
    </behavior>
  </serviceBehaviors>
</behaviors>
<serviceHostingEnvironment>
  <baseAddressPrefixFilters>
    <add prefix="http://subdomain.domain.com/"/>
  </baseAddressPrefixFilters>
</serviceHostingEnvironment>
<!--<standardEndpoints>
  <webHttpEndpoint>
    <standardEndpoint name="" helpEnabled="true"
      automaticFormatSelectionEnabled="true"/>
  </webHttpEndpoint>
</standardEndpoints>-->

正如您所看到的，它已经具有传输元素。但我还是克服了错误。原因是什么？

我的客户端配置：

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <system.serviceModel>
    <bindings>
      <wsHttpBinding>
        <binding name="CustomBinding_IService1" />
      </wsHttpBinding>
    </bindings>
    <client>
      <endpoint address="http://subdomain.domain.com/service1.svc" binding="wsHttpBinding"
        bindingConfiguration="CustomBinding_IService1" contract="ServiceReference1.IService1"
        name="CustomBinding_IService1">
        <identity>
          <userPrincipalName value="DOMAIN'subdomaindomaincom_web" />
        </identity>
      </endpoint>
    </client>
  </system.serviceModel>
</configuration>