c# - How to use session in apicontroller in asp.net mvc 4 -

i working on application using asp.net mvc 4. here want use autocomplete extender using jquery want populate location of cityid stored in session.

here function creating session:

public string create(string city) {     try     {         //httpsessionstatebase session["c"]=city;         //httpcontext.current.session["city"] = city;         system.web.httpcontext.current.session["city"] = city;         long cityid = convert.toint64(system.web.httpcontext.current.session["city"].tostring());          return city;     }     catch (exception ex)     {        throw (ex);     } } 

this function called when user select city city dropdownlist.

my jquery calling autocomplete extender is:

<script type="text/javascript"> var url = '@url.routeurl("defaultapi", new { httproute = "", controller = "productapi" })'; $('#txtlocation').autocomplete({     source: function (request, response) {         alert(url);         $.ajax({             url: url,             data: { query: request.term },             datatype: 'json',             type: 'get',             success: function (data) {                 response($.map(data, function (item) {                     return {                         label: item.name                         //value: item.id                     }                 }));             }         })     },     select: function (event, ui) {         $('#txtlocation').val(ui.item.label);         //$('#id').val(ui.item.value);         return false;     },     minlength: 1 }); 

my api controller :

public class productapicontroller : apicontroller {     sqlconnection cnn = new sqlconnection(system.configuration.configurationmanager.appsettings["sqlconn"].tostring());              [httpget]     public ienumerable<search> getproducts(string query = "")     {         cnn.open();         //string gid = getsession("t");          long cityid = convert.toint64(system.web.httpcontext.current.session["city"].tostring());          sqlcommand cmd = new sqlcommand("check_prefixtext", cnn);         cmd.parameters.addwithvalue("city", cityid);         cmd.parameters.addwithvalue("@prefix", query);          cmd.commandtype = commandtype.storedprocedure;          sqldataadapter da = new sqldataadapter(cmd);         datatable dt = new datatable();         da.fill(dt);          //var result = ienumerable<city>(query);         search obj = new search();         cnn.close();         return dt.asenumerable().select(row =>         {             return new search             {                 name = convert.tostring(row["name"]),             };         });     } } 

in global.asax file have written 2 methods:

protected void application_postauthorizerequest() {     if (iswebapirequest())     {         httpcontext.current.setsessionstatebehavior(sessionstatebehavior.required);     } }  private bool iswebapirequest() {     return httpcontext.current.request.apprelativecurrentexecutionfilepath.startswith(webapiconfig.urlprefixrelative); } 

in webapiconfig class have written follows:

public static string urlprefix { { return "api"; } } public static string urlprefixrelative { { return "~/api"; } }  public static void register(httpconfiguration config) {     config.routes.maphttproute(          name: "defaultapi",          routetemplate: webapiconfig.urlprefix + "/{controller}/{id}",          defaults: new { id = routeparameter.optional }     ); } 

but still value of session["city"] coming null in apicontroller while there there value stored showing in session["city"].

change api to:

[httpget] public ienumerable<search> getproducts(long cityid, string query = "") { 

then pass cityid data

data: {      cityid: $("#citydropdownid :selected").val(),     query: request.term  }, 

forget trying use "session" - it's not correct technology trying do.