Add Session Value to HiddenField placed in web control

<asp:HiddenField ID="mypostID" runat="server" Value=""/>

I wanted to ask if I could do something like:

<asp:HiddenField ID="mypostID" runat="server" Value="<% Response.Write(Session["ïd"])%>"/>

I cannot access the session from the user control code behind but if I put a Respose.Write on the page itself it shows the sessi开发者_JAVA技巧on value.

Thanks

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Use HTTPContext.CurrentContext.Current.HTTPSessionState to access session states from the code behind of the control.

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You need to specify the Fully Qualified Namespace for the HTTP Session in this case, because you're in a user control.

When you do Session["foo"] in a user control, it will access the UserControl.Session property (see here), not the HttpContext.Session.

So do it like this:

HttpContext.Current.Session("foo")

See more details on HttpContext.Current.Session here