Was this page helpful?
Your feedback about this content is important. Let us know what you think.
Additional feedback?
1500 characters remaining
Export (0) Print
Expand All

ObjectCache::Add Method (CacheItem, CacheItemPolicy)

.NET Framework 4.6 and 4.5

When overridden in a derived class, tries to insert a cache entry into the cache as a CacheItem instance, and adds details about how the entry should be evicted.

Namespace:  System.Runtime.Caching
Assembly:  System.Runtime.Caching (in System.Runtime.Caching.dll)

public:
virtual bool Add(
	CacheItem^ item, 
	CacheItemPolicy^ policy
)

Parameters

item
Type: System.Runtime.Caching::CacheItem

The object to add.

policy
Type: System.Runtime.Caching::CacheItemPolicy

An object that contains eviction details for the cache entry. This object provides more options for eviction than a simple absolute expiration.

Return Value

Type: System::Boolean
true if insertion succeeded, or false if there is an already an entry in the cache that has the same key as item.

The Add method overloads are virtual (not abstract) on the ObjectCache class, because the Add method internally calls AddOrGetExisting. This reduces the number of method overloads that a cache implementer has to provide. If a cache implementation does not require any special behavior for the Add method, it can just implement the AddOrGetExisting method overloads.

.NET Framework

Supported in: 4.6, 4.5, 4
Show:
© 2015 Microsoft