Skip to main content

ASP.NET Caching

Caching is process of saving html and data in browser cache. Some data are difficult to obatin it assumes lot of resouceof the server. The best way to store it in cache. So we can retrive from cache instead doing round trip to the server.There are also some portion of the site does not change frequently so caching is a good idea to store this portion ofwebsite in cahce rather then loadind it from server.

ASP.NET also provide caching features.ASP.NET Caching API provides great features for caching.ASP.NET provide three types of caching.

1) Page Output Caching
2) Page Fragment Caching
3) Data Caching


1) Page Output Caching:

In ASP.NET you can do page output caching with output directive....
Here is the code for output caching

<%@ OutputCache Duration="120" VaryByParam="none"%>

This means that page will cache for 120 second and during that time page will not change with get or post parameters.After 120 second page cache will be flush and then page content can be change by get or post parameters.

2) Page Fragment Caching:

We all know that it is impratical to cache whole page of website. So it is better cache a portion of a website thenwhole page. ASP.NET caching API also provide that feature.

From Following code asp.net can cache categoryid parameter of get and post method.

<%@ OutputCache Duration="120" VaryByParam="CategoryID"%>

You can also cache whole control in asp.net which can be used as portion of parameter.

<%@ OutputCache Duration="120" VaryByParam="none" VaryByControl="ViewCategory" %>

This will cache whole user control called viewcategory.

3) Data Caching:
For that ASP.NET Caching API provides two classes in System.Web.Cache name space.The first class, Cache, is the classwill be using to add and remove items from the data cache. The second class, CacheDependency,is used when assigning a cache dependency to an item in the data cache.

To add an item to the cache you can simply do:


' In VB.NET
Cache("name") = value


// In C#
Cache["name"] = value;


to get value

'IN VB.NET
value = Cache("name")

- or -

//IN C#
value = Cache.Get("name")


That's all..
Happy Programming....

Comments

Popular posts from this blog

How to create Rest API(Web API) with ASP.NET Core 1.0

Recently Microsoft has released ASP.NET Core 1.0 RC2, I am getting lots of request from readers that about creating Web API. So I thought it will be a good idea to write a blog post about how to create Rest API(Web API) with ASP.NET Core 1.0.

So let’s get started via creating an ASP.NET Core 1.0 Web Application like following.



Once you click on ASP.NET Web Application, It will ask whether you need to create Web Application or Web API application. We are going to Web API so I am going to select Web API Application like following. Please note that in ASP.NET Core 1.0 there is no separate libraries or DLLs required for creating web APIs. This is just a project template.



Now once you click on OK It will create a Web API application with default values controller and program.cs.  As you know Program.cs is now starting point for the ASP.NET Core 1.0 application so It contains all the required configuration and startup items. Following is a code for that.
using System.IO; using Microsoft.Asp…

How to use migration with Entity Framework Core

Entity framework core is  the lightweight, extensible and cross-platform version of Entity Framework. Before some time, Microsoft has Released a new version of Entity Framework RC2. I have written a couple of blog post about Entity framework code first migration earlier for Entity framework 6.0. So there was a couple of request coming for writing a blog post about Entity Framework Core RC2 migration. So I thought it will be a good idea to give an overview how database migration works in Entity Framework Core RC2. This post will cover a basic scenario where we are going to create the database with existing ASP.NET Identity migration and then we are going to create a new model and have that migration applied in the database.

How to use Entity Framework Migrations: Let’s get started, To demonstrate entity framework core migrations, I am going to create a sample asp.net core web application like following.



Once we select asp.net core application it will appear the following dialog.



Now w…

Solution: gulp is not recognized as internal or external command- Visual Studio

Recently, After Upgrading to the newer version of Gulp, I was getting this error.  After doing lots of  finding online and in my system I was able to figure out that Modules like Gulp does not installed to the path. So when you try to run it from the command line it was showing below error.
gulp is not recognized as internal or external command How to solve : gulp is not recognized as internal or external command To solve this error we just need to create a new environment variable and set the NPM modules path there.

To create an environment variable,  Right click My Computer/ This Pc and click on properties.  It will open following windows.



Go to Advance System Settings and it will open system properties windows like below.



Click on Environment Variables it will open an environment and system variables windows like below.



Click on new System variable and put NODE_PATH in system variable name and %AppData%\npm\node_modules into the variable value like below.



Click on Ok. That’s it. N…