Java Webservice returning null object to a .net client

Question

Can any one figure out my problem is...

I'm calling a webmethod of a Java Webservice (Axis 1.4) from a .Net client. That method returns a Map object, and if i call it from an Axis client works fine, but in my c# code it´s always null.

That's the WSDL:

<wsdl:definitions xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/" xmlns:apachesoap="http://xml.apache.org/xml-soap" xmlns:impl="urn:http.service.enlaces.portlet.ext.com" xmlns:intf="urn:http.service.enlaces.portlet.ext.com" xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/" xmlns:tns1="http://model.enlaces.portlet.ext.com" xmlns:wsdlsoap="http://schemas.xmlsoap.org/wsdl/soap/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" targetNamespace="urn:http.service.enlaces.portlet.ext.com">

<wsdl:types>

<schema xmlns="http://www.w3.org/2001/XMLSchema" targetNamespace="http://xml.apache.org/xml-soap">
<import namespace="urn:http.service.enlaces.portlet.ext.com"/>
<import namespace="http://model.enlaces.portlet.ext.com"/>
<import namespace="http://schemas.xmlsoap.org/soap/encoding/"/>
<complexType name="mapItem">
   <sequence>
 <element name="key" nillable="true" type="xsd:anyType"/>
 <element name="value" nillable="true" type="xsd:anyType"/>
   </sequence>
</complexType>
<complexType name="Map">
   <sequence>
   <element maxOccurs="unbounded" minOccurs="0" name="item" type="apachesoap:mapItem"/>
   </sequence>
</complexType>   
</schema>
 </wsdl:types>

<wsdl:message name="getFoldersAndBookmarksRequest" />
<wsdl:message name="getFoldersAndBookmarksResponse">
    <wsdl:part name="getFoldersAndBookmarksReturn" type="apachesoap:Map" />
</wsdl:message>

<wsdl:portType name="BookmarksEntryServiceSoap">
<wsdl:operation name="getFoldersAndBookmarks">
      <wsdl:input name="getFoldersAndBookmarksRequest"  message="intf:getFoldersAndBookmarksRequest" />
      <wsdl:output name="getFoldersAndBookmarksResponse" message="intf:getFoldersAndBookmarksResponse" />
    </wsdl:operation>
  </wsdl:portType>

<wsdl:binding name="Portlet_Bookmarks_BookmarksEntryServiceSoapBinding" type="intf:BookmarksEntryServiceSoap">
    <wsdlsoap:binding transport="http://schemas.xmlsoap.org/soap/http" style="rpc" />
  <wsdl:operation name="getFoldersAndBookmarks">
      <wsdlsoap:operation soapAction="" />
      <wsdl:input name="getFoldersAndBookmarksRequest">
        <wsdlsoap:body use="encoded" namespace="urn:http.service.enlaces.portlet.ext.com" encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" />
      </wsdl:input>
      <wsdl:output name="getFoldersAndBookmarksResponse">
        <wsdlsoap:body use="encoded" namespace="urn:http.service.enlaces.portlet.ext.com" encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" />
      </wsdl:output>
    </wsdl:operation>
</wsdl:binding>

and my c# auto-generated code:

[System.Web.Services.Protocols.SoapRpcMethodAttribute("", RequestNamespace="urn:http.service.enlaces.portlet.ext.com", ResponseNamespace="urn:http.service.enlaces.portlet.ext.com")]
[return: System.Xml.Serialization.SoapElementAttribute("getFoldersAndBookmarksReturn")]
public Map getFoldersAndBookmarks() {
    object[] results = this.Invoke("getFoldersAndBookmarks", new object[0]);
    return ((Map)(results[0]));
}

[System.CodeDom.Compiler.GeneratedCodeAttribute("System.Xml", "2.0.50727.3082")]
[System.SerializableAttribute()]
[System.Diagnostics.DebuggerStepThroughAttribute()]
[System.ComponentModel.DesignerCategoryAttribute("code")]
[System.Xml.Serialization.SoapTypeAttribute(Namespace="http://xml.apache.org/xml-soap")]
public partial class Map {

    private mapItem[] itemField;

    /// <comentarios/>
    public mapItem[] item {
        get {
            return this.itemField;
        }
        set {
            this.itemField = value;
        }
    }
}

I,ve seen everywhere unfortunately, i don't find the solution. Please, there are anyone what knows it?

Answer 1

I've faced the same problem a while ago. This happens when you try to get an array of elements through an axis webservice with a .net client.

The problem is "name=item" part of this line :

<element maxOccurs="unbounded" minOccurs="0" name="item" type="apachesoap:mapItem"/>

Try changing in that particular line "item" to "mapItem". Try one of these :

<element maxOccurs="unbounded" minOccurs="0" name="mapItem" type="apachesoap:mapItem"/>

or

<element maxOccurs="unbounded" minOccurs="0" name="key" type="apachesoap:mapItem"/>

or

<element maxOccurs="unbounded" minOccurs="0" name="value" type="apachesoap:mapItem"/>

Answer 2

So it very late to help you but I recently was running into the same problem.

Firstly I am using Eclipse to create a web service. The problem for me was that the wsdd generated was using the 'document/literal(wrapped)' style. Changing that to 'RPC' fixed the issue. No more nulls.

So maybe if you change your encoding to RPC that might fix your issue too.