вы можете использовать планировщик окон или службу, которая подходит вам лучше всего, но помимо этого у вас есть опция в веб-приложении, с помощью которой вы можете запустить запланированное задание. Для этого вам нужно использовать файл goabal.asax. Он будет запускаться через каждые 60 минут.
Код global.asax выглядит следующим образом: *
<code>
<%@ Application Language="C#" %>
<script runat="server">
private const string DeliveryPageUrl = "http://put any test url of your application";
private const string DummyCacheItemKey = "Any hard coded value"; // you can put any name here DummyCacheItemKey = "gigigagagugu";
void Application_Start(object sender, EventArgs e)
{
// Code that runs on application startup
RegisterCacheEntry();
}
protected void Application_BeginRequest(Object sender, EventArgs e)
{
// If the dummy page is hit, then it means we want to add another item
// in cache
if (HttpContext.Current.Request.Url.ToString() == DeliveryPageUrl)
{
// Add the item in cache and when succesful, do the work.
RegisterCacheEntry();
}
}
/// <summary>
/// Register a cache entry which expires in 60 minute and gives us a callback.
/// </summary>
/// <returns></returns>
private void RegisterCacheEntry()
{
// Prevent duplicate key addition
if (null != HttpContext.Current.Cache[DummyCacheItemKey]) return;
HttpContext.Current.Cache.Add(DummyCacheItemKey, "Test", null, DateTime.MaxValue,
TimeSpan.FromMinutes(60), CacheItemPriority.NotRemovable,
new CacheItemRemovedCallback(CacheItemRemovedCallback));
}
/// <summary>
/// Callback method which gets invoked whenever the cache entry expires.
/// We can do our "service" works here.
/// </summary>
/// <param name="key"></param>
/// <param name="value"></param>
/// <param name="reason"></param>
public void CacheItemRemovedCallback(string key, object value, CacheItemRemovedReason reason)
{
// We need to register another cache item which will expire again in one
// minute. However, as this callback occurs without any HttpContext, we do not
// have access to HttpContext and thus cannot access the Cache object. The
// only way we can access HttpContext is when a request is being processed which
// means a webpage is hit. So, we need to simulate a web page hit and then
// add the cache item.
HitPage();
}
/// <summary>
/// Hits a local webpage in order to add another expiring item in cache
/// </summary>
private void HitPage()
{
System.Net.WebClient client = new System.Net.WebClient();
client.DownloadData(DeliveryPageUrl);
}
void Application_End(object sender, EventArgs e)
{
// Code that runs on application shutdown
}
void Application_Error(object sender, EventArgs e)
{
// Code that runs when an unhandled error occurs
}
void Session_Start(object sender, EventArgs e)
{
// Code that runs when a new session is started
}
void Session_End(object sender, EventArgs e)
{
// Code that runs when a session ends.
// Note: The Session_End event is raised only when the sessionstate mode
// is set to InProc in the Web.config file. If session mode is set to StateServer
// or SQLServer, the event is not raised.
}
</script>
</code>