如何在 c#asp.net mvc 中从控制器获取会话变量值到 ajax 调用

Question

I want to fetch Session variable value from an mvc controller actionresult which returns a cshtml view. This ajax call is connected in a button click and is calling from a different cshtml.

function accountLogin() {
$.ajax({
    url: accountLogin,
    async: true,
    type: 'POST',
    cache: false,
    success: function (data) {
        var testUser = @Session[Keys.accountrole];
        alert(testUser);
        $("#navigationbar").empty();
        $("#navigationbar").html(data);}

C# Code

[HttpPost]
    public ActionResult accountLogin(){
        Session[Keys.accountrole] = "value";
        return View("_viewpage");
    }

The curent implementation is reaturning either undefined session variable or it will display the @session keyword itself not the value in it.

Answer 1

You can only access Session on the server side. So you have to get a Session variable value inside of the action and retun it back as a json value

Try this

    [HttpPost]
    public IActionResult accountLogin(){

        //I don't understand why you need it
        Session[Keys.accountrole] = "value";

        var sessionAccountRole=Session[Keys.accountrole];

        return OK( {accountRole=sessionAccountRole} );

        // or if you use an ancient net 
        return Json ( new {accountRole=sessionAccountRole} );

       // or maybe 
   return new JsonResult {accountRole=sessionAccountRole};
    }

and ajax

  success: function (data) {
        var testUser = data.accountRole;
        alert(testUser);