如何在共享的托管服务器上按配置的计划时间执行各种任务(例如电子邮件警报/发送新闻信件)？
解决方法
这是一个Global.ascx.cs文件,我以前用过这种方式,使用缓存到期来触发计划任务：
public class Global : HttpApplication
{
private const string CACHE_ENTRY_KEY = "ServiceMimicCacheEntry";
private const string CACHE_KEY = "ServiceMimicCache";
private void Application_Start(object sender,EventArgs e)
{
Application[CACHE_KEY] = HttpContext.Current.Cache;
RegisterCacheEntry();
}
private void RegisterCacheEntry()
{
Cache cache = (Cache)Application[CACHE_KEY];
if (cache[CACHE_ENTRY_KEY] != null) return;
cache.Add(CACHE_ENTRY_KEY,CACHE_ENTRY_KEY,null,DateTime.MaxValue,TimeSpan.FromSeconds(120),CacheItemPriority.Normal,new CacheItemRemovedCallback(CacheItemRemoved));
}
private void SpawnServiceActions()
{
ThreadStart threadStart = new ThreadStart(DoServiceActions);
Thread thread = new Thread(threadStart);
thread.Start();
}
private void DoServiceActions()
{
// do your scheduled stuff
}
private void CacheItemRemoved(string key,object value,CacheItemRemovedReason reason)
{
SpawnServiceActions();
RegisterCacheEntry();
}
}
目前,这会每2分钟触发一次您的操作,但这可以在代码中配置.
