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

Question

ICSM Computer · Answer

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 Listandlt;Userandgt;;
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) =andgt; {
        // Optional: log or refresh cache here
    }
);
3. Page Output Caching (Full Page Cache)
Caches the entire HTML output of a page.
In ASPX Page:
andlt;%@ OutputCache Duration="60" VaryByParam="none" %andgt;
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:
andlt;%@ Control Language="C#" %andgt;
andlt;%@ OutputCache Duration="120" VaryByParam="none" %andgt;
Include this user control in your page:
andlt;uc:PopularPosts runat="server" id="PopularPostsControl" /andgt;
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
andlt;%@ OutputCache %andgt; directive
On .aspx pages
Partial page caching
andlt;%@ OutputCache %andgt; in user control
On .ascx controls
Auto-invalidate
CacheDependency
On file or DB change
Cache removal
Cache.Remove(key)
Programmatically

forum

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

Anubhav Kumar

Can you answer this question?

1 Answers

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

Example: Caching Data in Code

2. Cache Insert with Callback (Auto Remove Notification)

3. Page Output Caching (Full Page Cache)

In ASPX Page:

4. Fragment Caching (User Control or Partial Cache)

Example in ASPX User Control:

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

6. Remove from Cache

Note

Summary Table

Liked By

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

forum

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

Anubhav Kumar

Can you answer this question?

1 Answers

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

Example: Caching Data in Code

2. Cache Insert with Callback (Auto Remove Notification)

3. Page Output Caching (Full Page Cache)

In ASPX Page:

4. Fragment Caching (User Control or Partial Cache)

Example in ASPX User Control:

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

6. Remove from Cache

Note

Summary Table

Liked By

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