Skip to main content

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());
}

Comments

Post a Comment

Popular posts from this blog

UML - Association, Aggregation, Composition, Generalization, Specialization, Realization and Dependency

Association Association is a simple relationship between two classes. For example A relationship between Professor Class and Student class is known as Association. Both Classes can exist without each other, so Professor and Student are two independent classes. In this kind of relationships there will not be any owner class. Both classes have their own life cycle. UML Notation:     Aggregation Aggregation is a special type of Association. It is known as “Has-A” relationship. For example A Department class can contain Professor Class. Here Department class is owner class. Here in this relationship even after deleting Department class, Professor Class can exits. UML Notation: Composition Composition is a special type of Aggregation. It is known as “Is-A” relationship. For example A University Class has many Department class. Here University and Department objects are dependent on each other. If we delete Univ...
1 comment
Read more

C# Generic Factory

Implement Factory pattern using generics     public interface IDoWork   {       string DoWork();   }     Declare an Interface first by abstracting the common  functionality    Here I am taking the example of DoWork     public class Manager : IDoWork   {     public string DoWork()     {         return "Manager Manages School" ;     }   }     Implement the IDoWork in concrete classes as shown      public class Teacher : IDoWork     {         public string DoWork()         {             return "Teacher teaches student in school" ;         ...
7 comments
Read more

SQL query - Table sorting

In this article we will learn how to sort the table values with out using dynamic query to improve performance. CREATE PROCEDURE SortingExample ( @sortFiled INT, @sortType INT  -- 1 for ASC, 2 for DESC ) AS BEGIN -- Create a table variable to store user data DECLARE @myTable TABLE ( UserID INT IDENTITY(1,1), UserName VARCHAR(50), Password VARCHAR(50), Email VARCHAR(50) ) -- Insert some data to table to work on that data INSERT INTO @myTable(UserName, Password, Email) VALUES ('Jack', 'JackPwd', 'jack@gmail.com') INSERT INTO @myTable(UserName, Password, Email) VALUES ('Anand', 'AnandPwd', 'raj@gmail.com') INSERT INTO @myTable(UserName, Password, Email) VALUES ('smith', 'smithPwd', 'smith@gmail.com') INSERT INTO @myTable(UserName, Password, Email) VALUES ('Brandy', 'BrandyPwd', 'tom@gmail.com') -- If @sortType = 1 then sort the selected field in ASC ord...
Post a Comment
Read more