<system.serviceModel>

     <bindings>

       <basicHttpBinding>

         <binding name="testWebServiceSoap" />

       </basicHttpBinding>

       <customBinding>

         <binding name="testWebServiceSoap12">

           <textMessageEncoding messageVersion="Soap12" />

           <httpTransport />

         </binding>

       </customBinding>

     </bindings>

     <client>

       <endpoint address="http://localhost:3360/WebServices/testWebService.asmx"

           binding="basicHttpBinding" bindingConfiguration="testWebServiceSoap"

           contract="ServiceReference1.testWebServiceSoap" name="testWebServiceSoap" />

       <endpoint address="http://localhost:3360/WebServices/testWebService.asmx"

           binding="customBinding" bindingConfiguration="testWebServiceSoap12"

           contract="ServiceReference1.testWebServiceSoap" name="testWebServiceSoap12" />

     </client>

   </system.serviceModel>

导致的原因是多了一段,删除这里即可:

       <endpoint address="http://localhost:3360/WebServices/testWebService.asmx"

           binding="customBinding" bindingConfiguration="testWebServiceSoap12"

           contract="ServiceReference1.testWebServiceSoap" name="testWebServiceSoap12" />