Question

I have an EditorTemplate that is repeated on a page. This EditorTemplate creates a Telerik Window (see code below). How do I ensure that only one instance of the PostalLookupWindow Window is created for a given page/request? I want to re-use this Window for all the EditorTemplates.

I have tried using ViewData and TempData to store temporary values indicating that the control has been created before but was unsuccessful.

I cannot put the Window creation in the controls’s parent as the EditorTemplate is re-used in multiple pages.

 Html.Telerik().Window()
    .Name("PostalLookupWindow")
    .Title("Postal Code Selection")
    .Height(430)
    .Width(700)
    .Modal(true)
    .Draggable(true)
    .Scrollable(false)
    .LoadContentFrom(Url.Action("Index","PostalCode", null, Request.Url.Scheme))
    .Visible(false).Render();

Answer 1

You could try using HttpContext.Items to store a value. There is only one instance of that collection for the entire request.