ASP.NET Cache dependency example

In this article we will learn how to implement file dependency in caching.

In this method the cache["messageDependency"] loads the file "DependencyFile.txt" in memory(cache) only when its content is changed in the disk.

public

void displayMessage()
{

String message;
String Path = "~/DependencyFile.txt";

         if (Cache["messageDependency"] == null)
         {
                  System.IO.StreamReader sReader = new StreamReader(Server.MapPath(Path));
                  message = sReader.ReadToEnd();
                  sReader.Close();
                  System.Web.Caching.CacheDependency msgDependency = new System.Web.Caching.CacheDependency(Server.MapPath(Path));

Cache.Insert(

"messageDependency", message, msgDependency);
}

Response.Write(Cache[

"messageDependency"].ToString());

}

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