How to access Session variables and set them in ja

2020-01-23 07:16发布

站内问答 / JavaScript
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In code-behind I set Session with some data.

Session["usedData"] = "sample data";

And the question is how can I get the Session value(in my example; "sample data") in javascript and set Session["usedData"] with a new value?

16条回答
贪生不怕死
2楼-- · 2020-01-23 07:36

I was able to solve a similar problem with simple URL parameters and auto refresh.

You can get the values from the URL parameters, do whatever you want with them and simply refresh the page.

HTML:

<a href=\"webpage.aspx?parameterName=parameterValue"> LinkText </a>

C#:

string variable = Request.QueryString["parameterName"];
if (parameterName!= null)
{
   Session["sessionVariable"] += parameterName;
   Response.AddHeader("REFRESH", "1;URL=webpage.aspx");
}
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【Aperson】
3楼-- · 2020-01-23 07:37

first create a method in code behind to set session:

 [System.Web.Services.WebMethod]
 public static void SetSession(int id)
 {
     Page objp = new Page();
     objp.Session["IdBalanceSheet"] = id;
 }

then call it from client side: 

function ChangeSession(values) {
     PageMethods.SetSession(values);
     }

you should set EnablePageMethods to true:

<asp:ScriptManager EnablePageMethods="true" ID="MainSM" runat="server" ScriptMode="Release" LoadScriptsBeforeUI="true"></asp:ScriptManager>
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做自己的国王
4楼-- · 2020-01-23 07:41

Accessing & Assigning the Session Variable using Javascript:

Assigning the ASP.NET Session Variable using Javascript:

 <script type="text/javascript">
function SetUserName()
{
    var userName = "Shekhar Shete";
    '<%Session["UserName"] = "' + userName + '"; %>';
     alert('<%=Session["UserName"] %>');
}
</script>

Accessing ASP.NET Session variable using Javascript:

<script type="text/javascript">
    function GetUserName()
    {

        var username = '<%= Session["UserName"] %>';
        alert(username );
    }
</script>
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【Aperson】
5楼-- · 2020-01-23 07:41

If you want read Session value in javascript.This code help for you.

<script type='text/javascript'> var userID='@Session["userID"]'; </script>

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Luminary・发光体
6楼-- · 2020-01-23 07:41

I was looking for solution to this problem, until i found a very simple solution for accessing the session variables, assuming you use a .php file on server side. Hope it answers part of the question :

access session value

<script type="text/javascript">        
    var value = <?php echo $_SESSION['key']; ?>;
    console.log(value);
</script>

Edit : better example below, which you can try on phpfiddle.org, at the "codespace" tab

<!DOCTYPE html>
<html>
 <head>
  <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  <?php
    $_SESSION['key'] = 10;
    $i = $_SESSION['key'];
  ?>
 </head>
 <body>
  <p id="affichage">hello</p>

  <script type="text/javascript">
    var value =  <?php echo $i; ?>;
    $("#affichage").html(value);   
  </script>

 </body>
</html>

set session value

pass it a variable of whatever, you may want to. eg,

$you = 13;
$_SESSION['user_id'] = $you;

This should work, tho' not tested it.

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萌系小妹纸
7楼-- · 2020-01-23 07:45

Assuming you mean "client side JavaScript" - then you can't, at least not directly.

The session data is stored on the server, so client side code can't see it without communicating with the server.

To access it you must make an HTTP request and have a server side program modify / read & return the data.

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