3

如何在共享托管服务器上按照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）？

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3 回答 3

10

这是一个 Global.ascx.cs 文件，我过去曾经做过这种事情，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，但这可以在代码中进行配置。

于 2009-04-09T10:34:03.903 回答
0

有些人在这里通过在 global.asax 中创建线程来做到这一点。听起来他们在这方面取得了成功。我自己从未测试过这种方法。

在我看来，这将是一个更好的选择，然后重载缓存过期机制。

于 2009-04-09T11:07:07.193 回答
0

You can use ATrigger scheduling service on a shared hosting without any problem. A .Net library is also available to create scheduled tasks without overhead.

Disclaimer: I was among the ATrigger team. It's a freeware and I have not any commercial purpose.

于 2013-08-26T11:54:10.897 回答