Simulate Windows Service with ASP.NET
- by Bayonian
Hi,
I have small web app that generate PDF files as a report. I'm trying to delete those generated PDF files after 10 sec that they are generated. What I want to do is to read a folder with PDF files every 10 sec, and delete all the PDF files inside that folder.
I read this post of Easy Background Tasks in ASP.NET. The following code is the VB version.
Protected Sub Application_Start(ByVal sender As Object, ByVal e As EventArgs)
AddTask("DoStuff", 10)
End Sub
Private Sub AddTask(ByVal name As String, ByVal seconds As Integer)
OnCacheRemove = New CacheItemRemovedCallback(CacheItemRemoved)
HttpRuntime.Cache.Insert(name, seconds, Nothing, DateTime.Now.AddSeconds(seconds), Cache.NoSlidingExpiration, CacheItemPriority.NotRemovable, _
OnCacheRemove)
End Sub
Public Sub CacheItemRemoved(ByVal k As String, ByVal v As Object, ByVal r As CacheItemRemovedReason)
' do stuff here if it matches our taskname, like WebRequest
DeletePDFilesInFoler()
' re-add our task so it recurs
AddTask(k, Convert.ToInt32(v))
End Sub
But I got this error
Delegate
'System.Web.Caching.CacheItemRemovedCallback'
requires an 'AddressOf' expression or
lambda expression as the only argument
to its constructor.
If this code works, where I should put it. Right, now I'm putting it in the master page. How to get this error out?
Thank you
