WCF Error in deserializing body of request message for operation

I have a asp.net client web application and a WCF web service which was developed from schema xsd. When calling the service i get an error in deserializing body of request. I tried updating service reference but that did not help.

This is my code:

OSEOP.HMA_OrderingBindingClient client = new OSEOP.HMA_OrderingBindingClient();

OSEOP.GetCapabilitiesRequest request = new OSEOP.GetCapabilitiesRequest();
request.GetCapabilities = new OSEOP.GetCapabilities();
request.GetCapabilities.service = "OS";

string[] arrAcceptedVersions = { "1.0.0", "2.0.0" };
request.GetCapabilities.AcceptVersions = arrAcceptedVersions;

OSEOP.Capabilities capabilities = client.GetCapabilities(request.GetCapabilities);


txtGetCapabilitiesResponse.Text = capabilities.Contents.ToString();

client.Close();

and this is the error:

System.ServiceModel.FaultException`1 was unhandled by user code
  Message=Error in deserializing body of request message for operation 'GetCapabilities'.
  Source=mscorlib
  StackTrace:
    Server stack trace: 
       at System.ServiceModel.Channels.ServiceChannel.ThrowIfFaultUnderstood(Message reply, MessageFault fault, String action, MessageVersion version, FaultConverter faultConverter)
       at System.ServiceModel.Channels.ServiceChannel.HandleReply(ProxyOperationRuntime operation, ProxyRpc& rpc)
       at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs, TimeSpan timeout)
       at System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCallMessage methodCall, ProxyOperationRuntime operation)
       at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message)
    Exception rethrown at [0]: 
       at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
       at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
       at OSEOP.HMA_OrderingBinding.GetCapabilities(GetCapabilitiesRequest request)
       at OSEOP.HMA_OrderingBindingClient.OSEOP.HMA_OrderingBinding.GetCapabilities(GetCapabilitiesRequest request) in c:\Windows\Microsoft.NET\Framework64\v4.0.30319\Temporary ASP.NET Files\oseop_testclient\023fa9f5\ea876945\App_WebReferences.k9c5tqe1.0.cs:line 44135
       at OSEOP.HMA_OrderingBindingClient.GetCapabilities(GetCapabilities GetCapabilities1) in c:\Windows\Microsoft.NET\Framework64\v4.0.30319\Temporary ASP.NET Files\oseop_testclient\023fa9f5\ea876945\App_WebReferences.k9c5tqe1.0.cs:line 44141
       at _Default.cmdGetCapabilities_Click(Object sender, EventArgs e) in d:\Documents\DEV\SARPilot\SVN_repository\Services\OrderingServices\TestClient\Default.aspx.cs:line 30
       at System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument)
       at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
  InnerException: 

as you can see, the error happens at the client and never gets sent out to the WCF service. For this reason i'm not getting anything in my MessageLogging. That's why i thought it would have something to do with the service reference.

Can anyone help?

EDIT #1: What i don't understand is the GetCapabilities takes a GetCapabilitiesRequest parameter but when i'm implementing the client, my intellisense asks for a OSEOP.GetCapabilities object.

OSEOP is what i named the web reference.

public class OrderingService : HMA_OrderingBinding
{
    public GetCapabilitiesResponse GetCapabilities(GetCapabilitiesRequest request)
    {
        throw new NotImplementedException();
    }
}

[System.CodeDom.Compiler.GeneratedCodeAttribute("System.ServiceModel", "3.0.0.0")]
[System.ServiceModel.ServiceContractAttribute(Namespace = "http://www.opengis.net/oseop/1.0", ConfigurationName = "HMA_OrderingBinding")]
public interface HMA_OrderingBinding
{
    [OperationContract]
    [XmlSerializerFormatAttribute]
    GetCapabilitiesResponse GetCapabilities(GetCapabilitiesRequest request);
}



/// <remarks/>
[System.CodeDom.Compiler.GeneratedCodeAttribute("svcutil", "3.0.4506.2152")]
[System.SerializableAttribute()]
[System.Diagnostics.DebuggerStepThroughAttribute()]
[System.ComponentModel.DesignerCategoryAttribute("code")]
[System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true, Namespace = "http://www.opengis.net/oseop/1.0")]
public partial class Capabilities : CapabilitiesBaseType
{

    private OrderingServiceContentsType contentsField;

    private NotificationProducerMetadataPropertyType notificationsField;

    /// <remarks/>
    [System.Xml.Serialization.XmlElementAttribute(Order = 0)]
    public OrderingServiceContentsType Contents
    {
        get
        {
            return this.contentsField;
        }
        set
        {
            this.contentsField = value;
        }
    }

    /// <remarks/>
    [System.Xml.Serialization.XmlElementAttribute(Order = 1)]
    public NotificationProducerMetadataPropertyType Notifications
    {
        get
        {
            return this.notificationsField;
        }
        set
        {
            this.notificationsField = value;
        }
    }
}

[System.Diagnostics.DebuggerStepThroughAttribute()]
[System.CodeDom.Compiler.GeneratedCodeAttribute("System.ServiceModel", "3.0.0.0")]
[System.ServiceModel.MessageContractAttribute(IsWrapped = false)]
public partial class GetCapabilitiesRequest
{

    [System.ServiceModel.MessageBodyMemberAttribute(Namespace = "http://www.opengis.net/oseop/1.0", Order = 0)]
    public GetCapabilities GetCapabilities;

    public GetCapabilitiesRequest()
    {
    }

    public GetCapabilitiesRequest(GetCapabilities GetCapabilities)
    {
        this.GetCapabilities = GetCapabilities;
    }
}

EDIT #2 @Marc: Marc, your answer was very helpful. But you see how the server side is something like this:

GetCapabilitiesResponse GetCapabilities(GetCapabilitiesRequest request) 

Yet my intellisense thinks it's something like this:

Capabilities GetCapabilities(GetCapabilities GetCapabilities1)

And I've found a snippet of code within the IOrder.cs file (47,256 lines of code generated from schema) that I'm sure is causing the problem but I tried commenting out the trouble function, updating service reference, and my intellisense still wants GetCapabilities GetCapabilities1

[System.Diagnostics.DebuggerStepThroughAttribute()]
[System.CodeDom.Compiler.GeneratedCodeAttribute("System.ServiceModel", "3.0.0.0")]
public partial class HMA_OrderingBindingClient : System.ServiceModel.ClientBase<HMA_OrderingBinding>, HMA_OrderingBinding
{

    public HMA_OrderingBindingClient()
    {
    }

    [System.ComponentModel.EditorBrowsableAttribute(System.ComponentModel.EditorBrowsableState.Advanced)]
    GetCapabilitiesResponse HMA_OrderingBinding.GetCapabilities(GetCapabilitiesRequest request)
    {
        return base.Channel.GetCapabilities(request);
    }

    public Capabilities GetCapabilities(GetCapabilities GetCapabilities1)
    {
        GetCapabilitiesRequest inValue = new GetCa开发者_Go百科pabilitiesRequest();
        inValue.GetCapabilities = GetCapabilities1;
        GetCapabilitiesResponse retVal = ((HMA_OrderingBinding)(this)).GetCapabilities(inValue);
        return retVal.Capabilities;
    }
}

---

Two questions:

1. Why do you create a GetCapabilitiesRequest object which contains a subobject GetCapabilities, and then in your method call, you only use the contained suboject GetCapabilities??

   So why not just create the GetCapabilities in the first place and forget about the wrapping object??

2. Also, can you please show us the GetCapabilitiesRequest and GetCapabilities and the return class Capabilities, too? If you have a deserialization error, most likely something with those classes isn't right...

Update: thanks for the update to your question.... hmm... can't seem to find anything obviously wrong at first glance....

About your question:

What I don't understand is the GetCapabilities takes a GetCapabilitiesRequest parameter but when I'm implementing the client, my intellisense asks for a OSEOP.GetCapabilities object.

Yes, that's clear - your service-side uses its set of classes - GetCapabilitiesRequest and so forth.

When you do an Add Service Reference in Visual Studio, what VS does is

• interrogate the server to find out about the service - what methods it has and what parameters it needs

• it creates a set of copies of your classes for the client-side proxy - in that namespace that you define on the Add Service Reference dialog box. Those are classes that look exactly the same as your server side classes - but they are not the same classes - they just serialize to XML (and deserialize from XML) the same way as those on the server. That's why your client-side proxy has different classes in a different namespace. That's standard WCF behavior - nothing to be alarmed about...

Update no. 2: Carlos, the schema you sent me seems to be incomplete or has errors. Try to use OGC project on CodePlex as a base and build in your code manually or wait until the schema gets ‘officially’ published.