asp.net - How to Read System.GUID on C# -

here's controller action

[httpget] public jsonresult getordernum(string input) {     aentities db = new aentities();      var result = r in db.orders                  r.trackingnumber.tostring() == input                  select new {                      r.status,                                            };      return json(result, jsonrequestbehavior.allowget); } 

and here make ajax call

var myactionurl = '@url.action("gettrackingnumber", "acustomer")';     var trackinginfo = $('#trackingnumber').val();       $('.track').click(function () {              $.ajax({                 type: "get",                 url: myactionurl,                 data: $('#trackingnumber').val(),                 contenttype: "application/json; charset=utf-8",                 datatype: "json",                 success: function (json) {                     alert("response js object: " + json);                     console.log(json);                 }       }); 

the problem wont read r.trackingnumber.tostring() system.guid. idea how can resolve this?

at moment when run it, empty array "[]".

there number of different ways guid can represented string.

system.guid.tostring() provides overload format specifier. select format specifier matches format of guid found in input.

update

'system.string tostring()' method, , method cannot translated store expression

you need instead create guid input:

guid inputguid = guid.parse(input);  var result = r in db.orders              r.trackingnumber == inputguid              select new {                  r.status,                                        };