c# - Calling asmx web service using JQuery with parameters causes 500 error -

c# - Calling asmx web service using JQuery with parameters causes 500 error -

i have simple plenty web service:

[scriptmethod(usehttpget = true, responseformat = responseformat.json)] [webmethod] public string gettoken(string a) { }

and i'm calling client side using jquery:

$.ajax({ post: 'get', contenttype: "application/json; charset=utf-8", datatype: 'json', url: '../url/gettoken', data: "{'a':'test'}", success: function (data) { }, error: function (a, b, c) { } });

the phone call fails , error returned 500 internal server error. have placed breakpoint within web service, , code isn't beingness reached @ all. when modify web service take no arguments @ (and remove data element jquery call) phone call succeeds. have played around different ways pass data element; i've passed json object (no quotes), , i've removed quotes around a argument. none of works.

edit:

using fiddler have determined actual error causing 500 "invalid web service call, missing value parameter".

edit 2:

passing info way works:

data: "a='test'"

i have no thought why. ideas?

haven't tested this, in code snippet have post: 'get' rather type: 'get'. may causing server reject contenttype json (which why info isn't beingness serialized properly).

c# web-services jquery asmx