У меня есть требование отобразить элемент управления в фоновом потоке и отправить вывод по почте. Итак, у меня есть этот фрагмент кода, работающий в фоновом потоке:
System.Threading.ThreadPool.QueueUserWorkItem(new System.Threading.WaitCallback(sendmail), new Object());
public void sendmail(object o)
{
UserControl cntrl = new Page().LoadControl("~/mycontrol.ascx") as UserControl;
StringWriter stringwriter = new StringWriter();
Html32TextWriter htmlwriter = new Html32TextWriter(stringwriter);
cntrl.RenderControl(htmlwriter);
SendEmailUsingNetMail(stringwriter);
}
At runtime I am getting this exception
System.NullReferenceException: Object reference NOT SET TO an instance of an object.
AT System.Web.UI.HtmlControls.HtmlForm.GetActionAttribute()
AT System.Web.UI.HtmlControls.HtmlForm.RenderAttributes(HtmlTextWriter writer)
AT System.Web.UI.HtmlControls.HtmlControl.RenderBeginTag(HtmlTextWriter writer)
AT System.Web.UI.HtmlControls.HtmlContainerControl.Render(HtmlTextWriter writer)
AT System.Web.UI.HtmlControls.HtmlForm.Render(HtmlTextWriter output)
AT System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter)
AT System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter)
AT System.Web.UI.HtmlControls.HtmlForm.RenderControl(HtmlTextWriter writer)
AT System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children)
AT System.Web.UI.Control.RenderChildren(HtmlTextWriter writer)
AT System.Web.UI.Control.Render(HtmlTextWriter writer)
AT System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter)
AT System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter)
AT System.Web.UI.Control.RenderControl(HtmlTextWriter writer)
AT RedBus.RBMail.sendmail(object o)
Тот же код при запуске из потока запросов asp.net работает отлично. Можно ли заставить эту штуку работать в самом фоновом потоке? Если да, то как?
Спасибо, Прадхан.