public static void PreloadWidgetsAsync(string zoneName)
{
//8/16/11 RonC Method Added
//Need to access the Cache to force it to be constructed
//while we still have HttpContext.
CacheProvider cache = Blog.CurrentInstance.Cache;
// Need blogSettings to pass to Ping since the current blog instance won't
// be detectable once in a BG thread.
Guid blogId = Blog.CurrentInstance.Id;
ThreadPool.QueueUserWorkItem(delegate {
// because HttpContext is not available within this BG thread
// needed to determine the current blog instance,
// set override value here.
Blog.InstanceIdOverride = blogId;
XmlDocument doc;
// check the cache for the document. if not loaded yet, load it & put in cache
if (Blog.CurrentInstance.Cache[zoneName] == null) {
doc = RetrieveXml(zoneName);
if (doc != null) {
Blog.CurrentInstance.Cache[zoneName] = doc;
}
} else {
doc = (XmlDocument)Blog.CurrentInstance.Cache[zoneName];
}
var zone = doc.SelectNodes("//widget");
if (zone == null) {
return;
}
System.Web.UI.Page page = new System.Web.UI.Page();
foreach (XmlNode widget in zone) {
var fileName = string.Format("{0}widgets/{1}/widget.ascx", Utils.ApplicationRelativeWebRoot, widget.InnerText);
try {
bool isAdminWidget = (fileName.ToLower().IndexOf("/administration/widget.ascx") >= 0);
if (!isAdminWidget || (isAdminWidget && Security.IsAuthenticated)) {
//Loading the widget control now, will cause it to be in
//memory when a real page request comes in later because
//the .Net framework will cached the control.
page.LoadControl(fileName);
}
} catch {
//mask the exceptions since we are just preloading controls
//Later when the control is loaded for a real page request
//The system will show an appropriate error.
}
}
});//end delegate
}
