I have a page call "A" Asp.Net and i want to allow only one user to access the page. If nobody accessing the page then any user are allowed to access the page Without using database how can i do it. I am trying to use page load of c# and window onbeforeunload event of javascript but didnt get it.
<script type="text/javascript" language="JavaScript">
var hidViewstate;
window.onload = body_Load;
window.onbeforeunload = WindowCloseHanlder;
function body_Load()
{
hidViewstate = document.getElementById('<%=hidViewstate.ClientID %>');
}
function WindowCloseHanlder()
{
hidViewstate.value = parseFloat(hidViewstate.value - 1);
}
</script>
<div>
<asp:Label ID="lblText" runat="server" Text="Label"></asp:Label>
<asp:HiddenField ID="hidViewstate" runat="server" />
</div>
protected void Page_Load(object sender, EventArgs e)
{
hidViewstate.Value = "1";
if(Convert.ToInt32(hidViewstate.Value) == 1)
{
lblText.Text = "Welcome First User";
}
else
{
lblText.Text = "Visiting on this page is not allowed because user is already login.";
}
}
This is counter to how a web server should operate. It would be interesting to know your actual problem that led you to try this.
On the technical side you could store a global variable in Application
. All requests share the same global object.
But if you explained to us the real problem you are trying to solve I think you would find this isn't a good approach and Im sure we could suggest a real solution.
You can use a global veriable, like static variable of a static class,
on page load you can check like
if(clsGlobal.userCount > 1)
{
Response.Redirect("~/anotherPage.aspx") // somewhere you want..
}
else
{
//display your welcome message
}
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