ASP.NET网站中的预定作业,无需购买专用服务器

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

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.

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