ASP. NET cache (cache)-asp. NET Trivia (2)

Overview

1. meaning

The data is placed in the cache and can be obtained directly from the cache for a specified period of time, avoiding stress on the database, etc.

2. Procedure

Set up:

HttpRuntime.Cache.Insert (CacheKey, objobject,null,absoluteexpiration,slidingexpiration);

Read:

httpruntime.cache["Name"]

Demoprotected void Page_Load (object sender, EventArgs e) {//cache is a globally shared DataTable dt = (Dat aTable) httpruntime.cache["persons"];//If the cache does not, then go to the database query //This can reduce the pressure on the database server
            if (dt = = null)              {                     dt = Sqlhelper.executequery ("SELECT * from T_persons");                     //Storage cache, expires after 30 seconds                      HttpRuntime.Cache.Insert ("persons", DT, NULL,                      DateTime.Now.AddSeconds (30), TimeSpan.Zero);            }                repeater1.datasource = DT;             Repeater1.databind ();        }

ASP. NET cache (cache)-asp. NET Trivia (2)