ASP.NET Calling webmethods inside an webservice - Internal Server Error

Question

I have an web service named AEWService.asmx with the following code:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Services;

namespace editor
{
    [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 AEWService : System.Web.Services.WebService
    {
        [WebMethod]
        public static Dictionary<string, string> TestFunc(string elementToBeModified, string selectedValue)
        {
            Dictionary<string, string> newValues = new Dictionary<string, string>();
            newValues.Add("k1", "val1");
            newValues.Add("k2", "val2");
            return newValues;
        }
    }
}

When I call the webmethod with ajax, I get a 500 error - Unknown web method TestFunc. The ajax call looks like this:

var dataString = JSON.stringify({ 
    "elementToBeModified": "someElement", 
    "selectedValue": "someValue"
});
$.ajax({
  url: 'AEWService.asmx/TestFunc',
  type: "POST",
  data: dataString,
  contentType: "application/json; charset=utf-8",
  dataType: "json",
  success: function (data) {
     // do somethig...
  }
});

I also added the following lines into web.config under tags (I'm not sure what they mean but I hope they are ok):

 <remove verb="*" path="*.asmx"/>
        <add verb="*" path="*.asmx" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>

The code worked perfect when the webmethod was on a aspx page. What's wrong with the asmx?

Thanks!

Put a try/catch in the web method and see if any error is being raised... — Brian Mains
– Brian Mains, Commented Dec 13, 2011 at 13:13

Community · Accepted Answer · 2017-05-23 11:43:22Z

4

You can not return a dictionary object from webservice. See this post. http://forums.asp.net/t/1370858.aspx/1

Also don't mark the webmethod as static. Check here Why are Static Methods not Usable as Web Service Operations in ASMX Web Services?

edited May 23, 2017 at 11:43

CommunityBot

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answered Dec 13, 2011 at 13:13

Pavan

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2 Comments

VladN Over a year ago

I was happy if the function trowed an exception about the returning type. But the problem is that I can not call that function :) Thanks!

VladN Over a year ago

Silly me ... I copy/pasted the WebMethod from aspx into the asmx and I forgot about the static :) Thanks a lot!

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