In my webpage there is a parameter called "Gooo" it's usage is for path of folder which contain downloads files 'i.e ("Down/zip/")
I want to send this parameter(Gooo) from another page.I like it to use post mehod or even something like"download.aspx?id=Down/zip/

what should I do for this purpose
page:download.aspx
------------------------
<script runat="server">
Dim Gooo As String = "Down/zip/"
Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
BindDataList()
End Sub
</script>

If you just want it passed to one single page, then a query string like you have above would be appropriate. In the receiving page, you access it with Request.QueryString("id") (VB) or Request.QueryString["id"]; (C#).

If you want it to be accessable across multiple pages, you could use a session variable.
Session("Gooo") = "/whatever"
then:
MyVar = Session("Gooo")

Let's tell simpler it's the adress of folder that I have saved The Files and it's value is read from the DB in the form1 and then I will send it to the form2.

where should I put the "Request.QueryString("id") "
When I put it in the page_load sub I will encounter error
when I do something like this
Dim Gooo As String = Request.QueryString("id")
again I encounter the Error.
Note that "id" must contain the VAlue which I send from the frist page.
If it's possible I want to send it so that No one can Understand the value of "id"