WCF服务请求标头中未获取SoapAction属性

Question

我试图从WCF请求标头中获取SoapAction值。

在WSDL文件中，SoapAtion如下所述

<wsdl:operation name="getCustomer">
      <soap:operation soapAction="getCustomer" style="document" />
      <wsdl:input>
        <soap:body use="literal" />
      </wsdl:input>
      <wsdl:output>
        <soap:body use="literal" />
      </wsdl:output>
      <wsdl:fault name="ServiceFaultExceptionFault">
        <soap:fault use="literal" name="ServiceFaultExceptionFault" namespace="" />
      </wsdl:fault>
    </wsdl:operation>

但是，我正在从((HttpWebRequest)request).Headers对象进入请求标头

Request Header:
{
Content-Type: application/soap+xml; charset=utf-8
Host: testhub.gct.com
Request-Context: appId=cid-v1:4ecd5f66-38c2-4c8d-b360-b166d19d91a5
Request-Id: |k6/8Z.Pads2.8cfbcce5_10.
Content-Length: 1138
Expect: 100-continue
Accept-Encoding: gzip, deflate
Connection: Keep-Alive
}

我在这里缺少SoapAction属性值，任何人都可以帮忙解决这个问题。