Shulou(Shulou.com)06/02 Report--

In this issue, the editor will bring you what are the three strategies for Cache expiration in ASP.NET cache. The article is rich in content and analyzes and describes it from a professional point of view. I hope you can get something after reading this article.

We add three buttons on the page and double-click the button to create an event handling method, and the three buttons use different expiration policies to add the ASP.NET cache.

The Click event handling method for the three buttons is as follows:

Protected void btn_InsertNoExpirationCache_Click (object sender, EventArgs e) {DataSet ds = GetData (); Cache.Insert ("Data", ds);} protected void btn_InsertAbsoluteExpirationCache_Click (object sender, EventArgs e) {DataSet ds = GetData (); Cache.Insert ("Data", ds,null, DateTime.Now.AddSeconds (10), TimeSpan.Zero);} protected void btn_InsertSlidingExpirationCache_Click (object sender, EventArgs e) {DataSet ds = GetData () Cache.Insert ("Data", ds, null, DateTime.MaxValue, TimeSpan.FromSeconds (10);}

Let's analyze these three ASP.NET cache expiration strategies.

◆ never expires. Just assign cached Key and Value directly.

◆ absolute time expires. DateTime.Now.AddSeconds (10) indicates that the cache expires after 10 seconds, and TimeSpan.Zero indicates that the smooth expiration policy is not used.

◆ change time expires (smooth expiration). DateTime.MaxValue indicates that the absolute time expiration policy is not used, and TimeSpan.FromSeconds (10) indicates that the cache expires without access for 10 consecutive seconds.

Here, we all use the Insert () method to add the cache. In fact, Cache also has an Add () method that can also add items to the cache. The difference is that the Add () method can only add items that are not in the cache, and adding items already in the cache will fail (but will not throw an exception), while the Insert () method can overwrite the original item.

Note: unlike Application, there is no need to use locking operations when inserting ASP.NET cache. Cache will handle concurrency on its own.

These are the three strategies of Cache expiration in ASP.NET cache shared by Xiaobian. If you happen to have similar doubts, please refer to the above analysis to understand. If you want to know more about it, you are welcome to follow the industry information channel.

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