asp.net - Pass Session Variable to another page Javascript - Stack Overflow

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I guys, I'm creating a VB.NET application, and this is the first time that I used Session Variables.

What I want to do is to pass the session variable from a page (first.aspx) to another page (second.aspx) via url.

Here an example of what I want to do:

In the first.aspx.vb page I declare a session variable and assign to it a value

Session("example") = "example123"

Then I pass this Session Variable to the first.aspx page

Response.Write(Session("example"))

and via javascript read the value of the Variable

<script type= text/javascript>
    var SessionVar = '<%=Session("example")%>)';
</script>

Now, what I want to do is to change the value of the Variable (for example setting it as example456), and then pass the variable to the second.aspx [for example with window.open()] so that the url not contains the value of the variable but its name:

url/second.aspx?value=example AND NOT url/second.aspx?value=example456

Infact I don't want that the user read the value of the variable.

Finally I have to read the value of the session variable in the second.aspx.vb via Request.QueryString("value") and do the various operations.

Is it possible ?

If not, there is anothe way to do this

Thanks for the help :)

I guys, I'm creating a VB.NET application, and this is the first time that I used Session Variables.

What I want to do is to pass the session variable from a page (first.aspx) to another page (second.aspx) via url.

Here an example of what I want to do:

In the first.aspx.vb page I declare a session variable and assign to it a value

Session("example") = "example123"

Then I pass this Session Variable to the first.aspx page

Response.Write(Session("example"))

and via javascript read the value of the Variable

<script type= text/javascript>
    var SessionVar = '<%=Session("example")%>)';
</script>

Now, what I want to do is to change the value of the Variable (for example setting it as example456), and then pass the variable to the second.aspx [for example with window.open()] so that the url not contains the value of the variable but its name:

url/second.aspx?value=example AND NOT url/second.aspx?value=example456

Infact I don't want that the user read the value of the variable.

Finally I have to read the value of the session variable in the second.aspx.vb via Request.QueryString("value") and do the various operations.

Is it possible ?

If not, there is anothe way to do this

Thanks for the help :)

• javascript
• asp
• vb
• session-variables

Share Improve this question Follow asked May 1, 2013 at 9:36 user2217039user2217039 13122 gold badges44 silver badges1111 bronze badges

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2 Answers 2

Sorted by: Reset to default 2

To set session variable from javascript can be done like below:

1. Create a hidden field control on the first page

   <asp:HiddenField ID="HiddenField1" runat="server" />
   

2. Client script to set value of the hidden field

   function setVal(value) {
       // if using jQuery
       $("#<%= HiddenField1.ClientID%>").val(value);
   
       // if using javascript
       var hf = document.getElementById("<%= HiddenField1.ClientID%>");
       hf.value = value;
   }
   

3. Create a button or link to navigate to the second page

   <asp:Button ID="Button1" runat="server" Text="Go to second page" OnClick="NavigateToSecondPage" /> 
         or 
   <asp:LinkButton ID="LinkButton1" runat="server" OnClick="NavigateToSecondPage">Go to second page</asp:LinkButton>
   

4. In the first page code behind, create the NavigateToSecondPage sub to handle the onclick event of the button/link

   Protected Sub NavigateToSecondPage(sender As Object, e As EventArgs)
       Session("example") = HiddenField1.Value
       Response.Redirect("SecondPage.aspx")
   End Sub
   

Therefore, in your second page, you can access the Session("example") value and it will have a new value set by the client script in the first page.

Session variables are called this way because they are passed automatically from one page to the other within the same session, so you should just modify the value of the variable whenever you want and then access it again in the second page to find the value. You don't need to pass anything explicitely.

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