Web services do not work in mono 4

Question

I have an application that uses Webservices with ASP.Net and should support it. So I sharpened my skills on this topic. I have no problem running Webservice on Windows with VS 2013, but you have problems with mono.

Here is the error I get when running the code

System.ArgumentNullException Value cannot be null. Parameter name: path1 Description: HTTP 500.Error processing request. Details: Non-web exception. Exception origin (name of application or object): mscorlib. Exception stack trace: at System.IO.Path.Combine (System.String path1, System.String path2) [0x00006] in <filename unknown>:0 at System.Web.Services.Configuration.WsdlHelpGeneratorElement.get_HelpGeneratorPath () [0x0000c] in <filename unknown>:0 at System.Web.Services.Protocols.DocumentationServerProtocol.Initialize () [0x001f1] in <filename unknown>:0 at System.Web.Services.Protocols.ServerProtocol.SetContext (System.Type type, System.Web.HttpContext context, System.Web.HttpRequest request, System.Web.HttpResponse response) [0x00022] in <filename unknown>:0 at System.Web.Services.Protocols.ServerProtocolFactory.Create (System.Type type, System.Web.HttpContext context, System.Web.HttpRequest request, System.Web.HttpResponse response, System.Boolean& abortProcessing) [0x00014] in <filename unknown>:0 

and here are the codes

WebService1.asmx

 <%@ WebService Language="C#" CodeBehind="WebService1.asmx.cs" Class="DemoService.WebService1" %> 

WebService1.asmx.cs

 using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.Services; using System.Xml; namespace DemoService { /// <summary> /// Summary description for WebService1 /// </summary> [WebService(Namespace = "http://tempuri.org/")] [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)] [System.ComponentModel.ToolboxItem(false)] // To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line. // [System.Web.Script.Services.ScriptService] public class WebService1 : System.Web.Services.WebService { [WebMethod] public string HelloWorld() { return "Hello World"; } [WebMethod] public XmlElement AddMe(int a, int b) { XmlDocument doc = new XmlDocument(); for(int i=0; i<5; i++) { XmlNode n = doc.CreateNode( XmlNodeType.Element, i.ToString(), "me.com.aisee"); for(int j=0; j<5; j++) { //n.AppendChild(doc.CreateElement(j.ToString())); } } return doc.DocumentElement; } } } 

I'm not what I miss here. as far as I know, it should just work fine. Here is my version of Mono

 ~$ mono --version Mono JIT compiler version 4.3.0 (tarball Fri Jun 12 11:43:58 UTC 2015) Copyright (C) 2002-2014 Novell, Inc, Xamarin Inc and Contributors. www.mono-project.com TLS: __thread SIGSEGV: altstack Notifications: epoll Architecture: amd64 Disabled: none Misc: softdebug LLVM: supported, not enabled. GC: sgen 

Answer 1

This is a mistake in mono. You can look here: https://bugzilla.xamarin.com/show_bug.cgi?id=37137

and https://bugzilla.xamarin.com/show_bug.cgi?id=39772

Answer 2

It looks like the documentation page for webservice has not yet been implemented. But the web service should work despite this error. You can see this by adding ?WSDL to the end of the URL, i.e. http: //localhost/WebService1.asmx? WSDL