在MVC 4 Razor中使用Javascript添加会话

Question

I'm writing application which upload file, first I need some configuration for file storage i read the first Ten rows and show them to user, user provide configuration and I'll upload the file .

i tried this

<script>
document.getElementById('file').addEventListener('change', readSingleFile, false);
function readSingleFile(evt) {
    var FileBlock = "";   
    var contents="";
    var f = evt.target.files[0];
    if (f) {
        var r = new FileReader();
        r.onload = function (e) {
            contents = e.target.result;
            var Rows = contents.toString().split("\n", 10);
            FileBlock = Rows[0];
             for (var i = 1 ; i < Rows.length; i++) {
                 FileBlock += "|" + Rows[i];
             }
             alert(contents);

            @{
                Session["Test"] = @:contents+"";
             }

            OpenDockPanelBySumbitForm("ImporterPanel", "form",FileBlock);
            Hide_ContentZone_Panel();
        }
        r.readAsText(f);      
    } else {
        alert("Failed to load file");
    }
}

this piece of code not work

@{
   Session["Test"] = @:contents+"";
 }

if anyone Can Help I'll be grateful, Thanks in participation.

Answer 1

I found that there is no way to do that, because C# Code compiled first before Javascript, so C# will not be able to see Javascript code while the opposite is possible.

one way to solve is move your script to another folder -plugins - to insure that it will compile first.

check Source here

Answer 2

Asp.net code is running server-based dynamic work in Javascript. JavaScript assign values ​​to variables based on the server can not. However, keeping in hidden variables you can use;

http://i.hizliresim.com/aq336d.png

<input type="hidden" id="hdnsession" name="sessionData" value=" @ViewBag.session??"" " />
public ActionResult test(string sessionData){
Session["Test"] = sessionData;
ViewBag.session = Session["Test"];
return View();
}