[invalidoperationexception: sequence contains no elements] system.linq.enumerable.first(ienumerable`1 source) +335 sd.smartwebsite.article.article.bindarticle() +274 sd.smartwebsite.article.article.page_load(object sender, eventargs e) +49 system.web.util.callieventhandlerdelegateproxy.callback(object sender, eventargs e) +52 system.web.ui.control.onload(eventargs e) +97 system.web.ui.control.loadrecursive() +61 system.web.ui.page.processrequestmain(boolean includestagesbeforeasyncpoint, boolean includestagesafterasyncpoint) +693 |