internal server error

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I am fetching data from database and want to fill it in the dropdownlist. Following is my Javascript code .

<pre lang="c#">
 $(document).ready(function () {
         //function search(){
         alert(location.pathname);
         $.ajax({

             type: "GET",
             url:location.pathname+ "SearchFromHome.asmx/AllCities",
             data: "{}",
             dataType: "json",
             contentType: "application/json; charset=utf-8",
             success: OnSuccess,
             error: onerror

         });
     });

Following is the code in web service.

<pre lang="c#">
   [WebMethod]
        [ScriptMethod(ResponseFormat = ResponseFormat.Json]
        public  List<City> AllCities()
        {
            List<City> cityList = new List<City>();

            using (cab_4_21Entities1 d = new cab_4_21Entities1())
            {
                cityList = d.Cities.ToList<City>();
            }
            return cityList;
        }

when I run the project, it gives 500 internal server error. In inspect element, console tab, the error location is shown in jquery file - jquery-2.1.3.min.js.

Posted 20-Mar-15 0:56am

Dolly Nimavat

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Thanks7872 · Answer 1 · 2015-03-20T01:06:00

Change the code as follows:

C#

$(document).ready(function () {
           $.ajax({
               type: "POST",
               url: "SearchFromHome.asmx/AllCities",
               data: "{}",
               contentType: "application/json; charset=utf-8",
               dataType: "json",
               success: ....,
               error:....
           });
       });

C#

[WebMethod]
[ScriptMethod(ResponseFormat = ResponseFormat.Json)]
public List<City> AllCities()
{
  ...........
  ...........
}

Make sure to uncomment [System.Web.Script.Services.ScriptService] in your webservice file. I've tested this code and it's working.

Regards...