C# 如何使用带有WCF服务引用的RPC样式的Web服务？

我正在编写一个C#客户端，它调用web服务来验证客户端。我使用AddServiceReference将wsdl文件添加到我的项目中，并成功生成了代理类

我正在创建新的对象实例，这些对象将按如下方式使用：

authenticateAccessPortTypeClient client = new authenticateAccessPortTypeClient();
authDetails details = new authDetails();
returnResult result = new returnResult();

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:example="www.example.com">
   <soapenv:Header/>
   <soapenv:Body>
      <example:authenticateAccessResponse>
         <result>
            <message>some string</message>
         </result>
      </example:authenticateAccessResponse>
   </soapenv:Body>
</soapenv:Envelope>

<soap:binding style="document" transport="http://schemas.xmlsoap.org/soap/http"/>
<wsdl:operation name="nameOfWebMethod">
  <soap:operation soapAction="nameOfWebMethod"/>
  <wsdl:input>
    <soap:body use="literal"
               encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"
               namespace="urn:youNamespace:nameOfService"/>
    <soap:header message="tns:messageName" part="nameOfType" use="literal"/>
  </wsdl:input>
  <wsdl:output>
    <soap:body use="literal"
               encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"
               namespace="urn:youNamespace:nameOfService"/>
  </wsdl:output>
</wsdl:operation>

当用户需要进行身份验证时，这是我的代码：

// This is details that needs to be passed in the header of the SOAP Envelope
details.key = "some key as string";
details.mode = "the mode as string";

// This is a parameter that is passed in the body of the SOAP Envelope
string memKey = "the member key as string";

result = client.authenticateAccess(details, memKey);

textBoxResult.Text = result.message;

我的soap响应如下所示：

authenticateAccessPortTypeClient client = new authenticateAccessPortTypeClient();
authDetails details = new authDetails();
returnResult result = new returnResult();

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:example="www.example.com">
   <soapenv:Header/>
   <soapenv:Body>
      <example:authenticateAccessResponse>
         <result>
            <message>some string</message>
         </result>
      </example:authenticateAccessResponse>
   </soapenv:Body>
</soapenv:Envelope>

<soap:binding style="document" transport="http://schemas.xmlsoap.org/soap/http"/>
<wsdl:operation name="nameOfWebMethod">
  <soap:operation soapAction="nameOfWebMethod"/>
  <wsdl:input>
    <soap:body use="literal"
               encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"
               namespace="urn:youNamespace:nameOfService"/>
    <soap:header message="tns:messageName" part="nameOfType" use="literal"/>
  </wsdl:input>
  <wsdl:output>
    <soap:body use="literal"
               encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"
               namespace="urn:youNamespace:nameOfService"/>
  </wsdl:output>
</wsdl:operation>

一些绳子

在生成的代理类中，returnResults如下所示：

public partial class returnResult : object, System.ComponentModel.INotifyPropertyChanged {

    private string messageField;

    /// <remarks/>
    [System.Xml.Serialization.XmlElementAttribute(Form=System.Xml.Schema.XmlSchemaForm.Unqualified, Order=0)]
    public string message {
        get {
            return this.messageField;
        }
        set {
            this.messageField = value;
            this.RaisePropertyChanged("message");
        }
    }

    public event System.ComponentModel.PropertyChangedEventHandler PropertyChanged;

    protected void RaisePropertyChanged(string propertyName) {
        System.ComponentModel.PropertyChangedEventHandler propertyChanged = this.PropertyChanged;
        if ((propertyChanged != null)) {
            propertyChanged(this, new System.ComponentModel.PropertyChangedEventArgs(propertyName));
        }
    }
}

public分部类returnResult:object，System.ComponentModel.INotifyPropertyChanged{
私有字符串消息字段；
/// 
[System.Xml.Serialization.xmlementAttribute（Form=System.Xml.Schema.XmlSchemaForm.Unqualified，Order=0）]
公共字符串消息{
得到{
返回此.messageField；
}
设置{
this.messageField=值；
此.RaisePropertyChanged（“消息”）；
}
}
公共事件System.ComponentModel.PropertyChangedEventHandler PropertyChanged；
受保护的void RaisePropertyChanged（字符串propertyName）{
System.ComponentModel.PropertyChangedEventHandler propertyChanged=this.propertyChanged；
如果（（propertyChanged！=null））{
propertyChanged（这是新的System.ComponentModel.PropertyChangedEventArgs（propertyName））；
}
}
}

---

我不断得到错误：对象引用未设置为对象的实例，返回结果为空。

经过大量的谷歌搜索和调试，感谢对本文发表评论的用户，我解决了我的问题

实际的问题不在客户端，而是WSDL文件本身。我将WSDL文件的绑定样式更改为使用文本包装的文档。我的wsdl文件的类型结构已更改为以下内容：

<xsd:element name="nameOfType">
    <xsd:complexType>
      <xsd:sequence>
        <xsd:element minOccurs="1" maxOccurs="1" name="element1" type="xsd:string"/>
        <xsd:element minOccurs="1" maxOccurs="1" name="element2" type="xsd:string"/>
      </xsd:sequence>
    </xsd:complexType>
  </xsd:element>

complexType标记需要包装在另一个元素标记中，才能使用文字包装，因为名称属性是在第一个元素中设置的

消息标签随后更改为：

<wsdl:message name="messageName">
    <wsdl:part name="nameOfType" element="tns:nameOfType"/>
</wsdl:message>

*注意元素属性而不是类型属性

绑定方式如下所示：

authenticateAccessPortTypeClient client = new authenticateAccessPortTypeClient();
authDetails details = new authDetails();
returnResult result = new returnResult();

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:example="www.example.com">
   <soapenv:Header/>
   <soapenv:Body>
      <example:authenticateAccessResponse>
         <result>
            <message>some string</message>
         </result>
      </example:authenticateAccessResponse>
   </soapenv:Body>
</soapenv:Envelope>

<soap:binding style="document" transport="http://schemas.xmlsoap.org/soap/http"/>
<wsdl:operation name="nameOfWebMethod">
  <soap:operation soapAction="nameOfWebMethod"/>
  <wsdl:input>
    <soap:body use="literal"
               encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"
               namespace="urn:youNamespace:nameOfService"/>
    <soap:header message="tns:messageName" part="nameOfType" use="literal"/>
  </wsdl:input>
  <wsdl:output>
    <soap:body use="literal"
               encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"
               namespace="urn:youNamespace:nameOfService"/>
  </wsdl:output>
</wsdl:operation>

---

感谢@John Saunders和@Roy Dictus为您提供的输入和指导。

您在哪一行得到了错误？我试图显示结果的最后一行。消息。几乎所有

NullReferenceException

的情况都是相同的。有关提示，请参阅“”。显然，如果

returnResult

为空，那么

returnResult.message

将抛出

NullReferenceException

。所有这些代码都没有NRE的概念，也没有如何调试它们。嗯，所以

textBoxResult

或

result

是

null

。但是您显示的SOAP结果不是空的，

消息

属性被填充。。。我会尝试

var result=client.authenticateAccess（详细信息，memKey）而不是上面的声明和调用，使用调试器确保
result
确实为null。顺便问一下，你是如何使用嗅探器得到SOAP结果的？