Services
Technology Web App Development Mobile App Development Windows App Development Database Development UI/UX Development Cloud Development SEO Digital Marketing Guest Posting Content Writing Artificial Intelligence Data Science ERP Development CRM Development CMS Development LMS Development Business Listing Blockchain Technology Startup Promotion
Products
Data Converter Cleaner TUC - Unit Converter Import Export Survey Manager Tweet Controller
Developer
Article Blog Forum Interview Beginner News Startup Quiz
Users
Career
Apply Job Internship
Pricing
Login Sign Up Get a Quote

forum

home / developersection / forums / how to to use cache in asp.net for cache?
Ask Question

How to to use cache in asp.net for cache?

Anubhav Sharma 853 03 Aug 2025

Explain How to to use cache in asp.net for cache  

cache cache
Updated 05 Aug 2025
Anubhav Sharma
Anubhav Sharma

Student

The Anubhav portal was launched in March 2015 at the behest of the Hon'ble Prime Minister for retiring government officials to leave a record of their experiences while in Govt service .

Message

1 Answers

Ravi Vishwakarma
Ravi Vishwakarma 05 Aug 2025
Report Abuse

In ASP.NET (non-Core), caching is a powerful feature to improve performance by storing data temporarily. You can cache data, pages, or fragments of pages.

1. Using HttpRuntime.Cache / HttpContext.Cache (In-Memory Cache)

Best for caching data like query results or processed objects.

Example: Caching Data in Code

// Store in cache
HttpContext.Current.Cache.Insert(
    key: "UserList",
    value: GetUsersFromDatabase(),
    dependencies: null,
    absoluteExpiration: DateTime.Now.AddMinutes(10),
    slidingExpiration: System.Web.Caching.Cache.NoSlidingExpiration
);

// Retrieve from cache
var users = HttpContext.Current.Cache["UserList"] as List<User>;

2. Cache Insert with Callback (Auto Remove Notification)

HttpContext.Current.Cache.Insert(
    "ProductList",
    GetProducts(),
    null,
    DateTime.Now.AddMinutes(5),
    Cache.NoSlidingExpiration,
    CacheItemPriority.Normal,
    (key, value, reason) => {
        // Optional: log or refresh cache here
    }
);

3. Page Output Caching (Full Page Cache)

Caches the entire HTML output of a page.

In ASPX Page:

<%@ OutputCache Duration="60" VaryByParam="none" %>
  • Duration="60": cache for 60 seconds.
  • VaryByParam="none": same cache for all query parameters.

4. Fragment Caching (User Control or Partial Cache)

Useful if part of your page changes often, but other parts don’t.

Example in ASPX User Control:

<%@ Control Language="C#" %>
<%@ OutputCache Duration="120" VaryByParam="none" %>

Include this user control in your page:

<uc:PopularPosts runat="server" id="PopularPostsControl" />

5. Cache with Dependencies (Auto Invalidate on File/DB Change)

CacheDependency fileDependency = new CacheDependency(Server.MapPath("~/App_Data/data.xml"));

HttpContext.Current.Cache.Insert(
    "MyData",
    LoadData(),
    fileDependency
);

Cache is cleared if the XML file changes.

6. Remove from Cache

HttpContext.Current.Cache.Remove("UserList");

Note

  • This is in-memory per AppDomain, so if your app restarts or is scaled across servers, the cache is reset.
  • For distributed cache (like Redis), you'd need external providers or ASP.NET Core.

Summary Table

Use Case API / Directive Where Used
Store and get data HttpContext.Current.Cache In code
Full page caching <%@ OutputCache %> directive On .aspx pages
Partial page caching <%@ OutputCache %> in user control On .ascx controls
Auto-invalidate CacheDependency On file or DB change
Cache removal Cache.Remove(key) Programmatically
MindStick Training