ASP.Net Outputcache programmatically not working in partial view

The following code is not working in a partial view.

<%
  // Pages always expire at midnight.
  Response.Cache.SetExpires(DateTime.Today.AddHours(24));

  if (variable > 0)
  {
      Response.Cache.SetCacheability(HttpCacheability.ServerAndPrivate);
  }
  else
  {
      Response.Cache.SetCacheability(HttpCacheability.Public);
  }
%>

Can anyone tell me why? The partial view is never cached a开发者_运维问答nd there is no apparent reason. Should I write code to activate the cache? How?

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Try putting the code into the control's codebehind file Page_Load or Page_Init event. I suspect that because your code is inline in your ascx file, it is being executed too late in the lifecycle of the control.