Docusign Listener Argument Null (dev Sandbox) - docusignapi

Question

I have created a webmethod in a C# webservice that listens for Docusign to call when an Envelope status changes:
[WebMethod]
public void DocuSignConnectUpdate(DocuSignEnvelopeInformation DocuSignEnvelopeInformation)
{
//Check if null
if (DocuSignEnvelopeInformation == null)
{
File.WriteAllText("C:\\websites\\DataAPI\\datalog.txt", "Data: " + "Data is null");
}
else
{
string envelopeId = "";
try
{
//Write a line in a file
File.WriteAllText("C:\\websites\\DataAPI\\datalog.txt", "Data: " + DocuSignEnvelopeInformation.ToString());
//Get some data out
envelopeId = DocuSignEnvelopeInformation.EnvelopeStatus.EnvelopeID;
//Write Data to a file
File.WriteAllText("C:\\websites\\DataAPI\\innerdatalog.txt", "Data: " + DocuSignEnvelopeInformation.ToString());
}
catch (Exception ex)
{
// could not serialize
File.WriteAllText("C:\\websites\\DataAPI\\errorlog.txt", "Exception: " + ex.Message);
throw new SoapException(ex.Message, SoapException.ClientFaultCode);
}
}
The issue I am having is that DocuSignEnvelopeInformation argument is not being set when called, so the code keeps terminating at the if==null statement. When I run the envelope data to the API using SoapUI everything works correctly. Any ideas what I'm missing would be appreciated.
EDIT: I wanted to Add the Interface here too since I forgot it originally
[ServiceContract(ConfigurationName = "IOperations", Namespace = "https://www.docusign.net/API/3.0")]
public interface IOperations
{
[OperationContract(Action = "DocuSignConnectListener/Operations/DocuSignConnectUpdate")]
[XmlSerializerFormat]
string DocuSignConnectUpdate(DocuSignEnvelopeInformation DocuSignEnvelopeInformation);
}

Answer 1

When a DocuSign webhook is set to use SOAP mode, the notification is sent as a SOAP request to your server (your listener).
If SOAP mode is off, then the notification is sent as a regular POST request with an XML body.
In your question, you say that
When I run the envelope data to the API using SoapUI everything works correctly
So it sounds like everything is worked as designed.

Answer 2

Ok I finally figured this out, turns out it just wasn't pretty enough so I added a decoration specifically:
[SoapDocumentMethod("http://tempuri.org/DocuSignConnectUpdate",
RequestNamespace = "http://tempuri.org",
ResponseNamespace = "http://tempuri.org",
Use = System.Web.Services.Description.SoapBindingUse.Literal,
ParameterStyle = System.Web.Services.Protocols.SoapParameterStyle.Wrapped)]
on the method and now everything works like its supposed too. Now that I look at it, it makes a lot more sense.