Get session variable in javascript

Question

User-376222682 posted
HI all, There is any possible way to get session variable in javascript ?? I used asp.net 1.1 and vb.net Thanks Sajjad

Answer 1

User541108374 posted

Hi,

normally I would say no because javascript is on the client and Sessions are on the server. However a scenario that you could give a try would involve AJAX. Create a webservice that's able to read the session object you're interested in and you could call that when appropriate from your client javascript code. If you're using ASP.NET AJAX you could also use PageMethods, remember to set the EnablePageMethods property on the ScriptManager control, so you don't need a dedicated webservice.

Update: I guess I'm just too busy learning AJAX at the moment that I want to solve everything with it [8-|]. The suggestions provided by the other members are also applicable to your problem. If you however want to decide at runtime in javascript which session to use you could use AJAX.

Grz, Kris.

Answer 2

User-1386562875 posted

You could write some javascript on the server-side and put the session variable in it and the render the result to your page.

 

Answer 3

User-376222682 posted
Thanx for reply... JohanNL can u send me the sample code... bcz i have no idea about that Thanks once again Sajjad

Answer 4

User-154051931 posted

See my reply here:

http://forums.asp.net/thread/1685859.aspx

Hope this helps!  Don't forget to mark the most helpful post(s) as Answer for the sake of future readers.

Answer 5

User1001737435 posted

you can access your session variable like '<%= Session("VariableName")%>'

 the text in single quotes will give session value.

regards,
 

Answer 6

User-376222682 posted
Thanks Josh :)
Your's code is working..........
Thanks to All

Sajjad

Answer 7

User-1068907443 posted

Thanks 4 the Help...but i got this error

A name was started with an invalid character.

           string a ='<%=Session["MemberType"]%>';
-----------------------^

Answer 8

User-144522783 posted

hi,

r u putting this code in external js?  

Answer 9

User-1068907443 posted

thanks 4 the response

i was not putting it in external js there was some other problem in my script,

a ="<%=Session("MemberType")%>";  is working fine.

actually i wanna to pass datagrid item value as parameter to javascript

<%# DataBinder.Eval(Container.DataItem, "CompanyName") %>'<%# DataBinder.Eval(Container.DataItem, "CompanyName")%>'<%# DataBinder.Eval(Container.DataItem, "CompanyName") %>

<%# DataBinder.Eval(Container.DataItem, "CompanyName") %>'<%# DataBinder.Eval(Container.DataItem, "CompanyName") %> but ..... not able to get the solution

 

Answer 10

User-144522783 posted

hi,

post your code 

Answer 11

User-1068907443 posted

thanx..alot 4 the response 

now i have done it but  in code behiend ........... actually i wanna to send user according to his/her menbertype through javascript nd two parameters are required one is action nd second one is vacancy id......i m fetching them using Request.QueryString["vacancy_id"];

 my javascript

function Trim(str)
{  while(str.charAt(0) == (" ") )
  {  str = str.substring(1);
  }
  while(str.charAt(str.length-1) == " " )
  {  str = str.substring(0,str.length-1);
  }
  return str;
}

function Openview(vid)
{
  alert(vid);
       var a;
           a ='<%=Session["MemberType"]%>';
     
       var s=Trim(a);
       if(s.toUpperCase()=="STUDENT")
       {
     location.href='view_vacancy.aspx?action=view'+'&vacancy_id'+'='+ vid;
         return false;
       }
       else
       {
        
        location.href='form.aspx?action=view'+'&vacancy_id'+'='+ vid;
         return false;
       }
  
}

</script>

 

my ascx page

here is the call to javascript......

i m using datagrid...

<asp:HyperLink Runat="server" Font-Name="Arial" Font-Size="16px" ForeColor="black" ID="Hyperlink_to_vacancy" Target="_self" Text='<%# DataBinder.Eval(Container.DataItem, "JobDesignation") %>' NavigateUrl="javascript:Openview(this.DataKeyField)">
              </asp:HyperLink>

in this case error........vacancy id is going undefined in code behind.....

or

<asp:HyperLink Runat="server" Font-Name="Arial" Font-Size="16px" ForeColor="black" ID="Hyperlink_to_vacancy" Target="_self" Text='<%# DataBinder.Eval(Container.DataItem, "JobDesignation") %>' NavigateUrl="javascript:Openview('<%# DataBinder.Eval(Container.DataItem, "vacancy_id") %>')">
              </asp:HyperLink>

 

error ......error in page .... no display

<script type=text/javascript> function Trim(str) { while(str.charAt(0) == (" ") ) { str = str.substring(1); } while(str.charAt(str.length-1) == " " ) { str = str.substring(0,str.length-1); } return str; } function Openview(vid) { alert(vid); var a; a ='<%=Session["MemberType"]%>'; var s=Trim(a); if(s.toUpperCase()=="STUDENT") { location.href='view_vacancy.aspx?action=view'+'&vacancy_id'+'='+ vid; return false; } else { location.href='form.aspx?action=view'+'&vacancy_id'+'='+ vid; return false; } } </script> <script type=text/javascript> function Trim(str) { while(str.charAt(0) == (" ") ) { str = str.substring(1); } while(str.charAt(str.length-1) == " " ) { str = str.substring(0,str.length-1); } return str; } function Openview(vid) { alert(vid); var a; a ='<%=Session["MemberType"]%>'; var s=Trim(a); if(s.toUpperCase()=="STUDENT") { location.href='view_vacancy.aspx?action=view'+'&vacancy_id'+'='+ vid; return false; } else { location.href='form.aspx?action=view'+'&vacancy_id'+'='+ vid; return false; } } </script>

Answer 12

User-144522783 posted

<asp:HyperLink Runat="server" Font-Name="Arial" Font-Size="16px" ForeColor="black" ID="Hyperlink_to_vacancy" Target="_self" Text='<%# DataBinder.Eval(Container.DataItem, "JobDesignation") %>' NavigateUrl="javascript:Openview('<%# DataBinder.Eval(Container.DataItem, "vacancy_id") %>')">
              </asp:HyperLink>

 

 

Hi,

try

<asp:HyperLinkField HeaderText="Type Name" SortExpression="Name" DataTextField="JobDesignation" DataNavigateUrlFormatString="javascript:Openview({0})" DataNavigateUrlFields="vacancy_id">

 

Answer 13

User-1068907443 posted

hi

thanx alot.........its working....

 

Answer 14

User-786444330 posted

 Hello,

I'm having a similar problem.  Not sure if I should start a new post so I decided to piggyback.

I have the following code in pageload (javascript) calling a web service that updates 

Session("CanUserViewAll").

 

TopENet.Vendors.ReturnVendorsDataSourceForLoggedUser(startIndex, _pager2.get_pageSize(),"VendorPaymentInquiry," + AlphaIndexValue ,onLoadResultsSuccess);

 

I update a javascript global variable in the onLoadResultsSuccess function with the following code.

LoggedUserCanSeeAll = '<%= Session("CanUserViewAll")%>' ;

alert( LoggedUserCanSeeAll);

 

Now for my issue.  First time the page loads the value should be 'False' however the alert shows blank.  Now if I refresh the browser without doing anything I get the correct value.  Is there a timing issue here?

 

Thanks in advance for your help. 

 

Answer 15

User1673853347 posted

Hi

When working with sessions and javascript be sure that you are not using any extrnal JS files.Bz it will not work.

Try to do all in intarnal JS files.

Answer 16

User583955902 posted

<script language=Javascript>
     function testval()
     {
       document.form1.Text1.value="<%= Session["MyName"] %>";

    return true;
     }
   
    </script>

Answer 17

User-1802511287 posted

<

 

 

{

 

{

document.getElementById(

 

 

{

__doPostBack(

}

 

 

function GetSessionValue()if

( document.getElementById("ctl00_ActiveContentArea_txtBox").value == "" )"ctl00_ActiveContentArea_txtBox").value = parent.frames["side"].document.getElementById("hidUserID").value;if ( document.getElementById("ctl00_ActiveContentArea_txtBox").value != "" )"id",document.getElementById("ctl00_ActiveContentArea_txtBox").value);else

{

__doPostBack(

}

}

}

"id",parent.frames["side"].document.getElementById("hidUserID").value);

</

script>

Answer 18

User798903548 posted

Actually you should never "piggyback". That is considered rude and not good forum etiquette and is called hijacking a thread.

This: LoggedUserCanSeeAll = '<%= Session("CanUserViewAll")%>' is ONLY going to reflect what the Session value contains when the page initially renders. When are you actually setting the value?

NC...

Answer 19

User-786444330 posted

 Thanks for the forum rules...  don't use them much...  I will remember that next time...

I set the value during the WebService call at the end of the page load event.

 

Thanks again

 

Pat

Answer 20

User798903548 posted

 Thanks for the forum rules...  don't use them much...  I will remember that next time...

I set the value during the WebService call at the end of the page load event.

 

Thanks again

 

Pat

 

I'm afraid that doesn't help much as I don't know if you mean the server-side page load or the client-side page load. Why don't you start your own new thread posting some of the relevent code. Then someone might be able to help.

NC...

 

Answer 21

User-1318143558 posted

hello friends you can get the values from query string to your java script variable as

this

var Qtext = '<%= Session["Stext"] %>';

and

this one is wrong for your asp.net application

var Qtext = '<%= Session("Stext") %>';

Happy coding