AddOrGetExisting<T>(String,T,CacheItemPolicy,String) Method

Adds an entry using key and value pair into the cache, and returns an existing cache entry with a matching key.

Syntax

C#
Visual Basic
Objective-C
Java
C++

public abstract T AddOrGetExisting<T>( 
   string key,
   T value,
   CacheItemPolicy policy,
   string regionName
)

'Declaration

Public Overloads MustOverride Function AddOrGetExisting(Of T)( _
   ByVal key As String, _
   ByVal value As T, _
   ByVal policy As CacheItemPolicy, _
   ByVal regionName As String _
) As T

'Usage

Dim instance As ObjectCache
Dim key As String
Dim value As T
Dim policy As CacheItemPolicy
Dim regionName As String
Dim value As T
 
value = instance.AddOrGetExisting(Of T)(key, value, policy, regionName)

public abstract<T> T addOrGetExisting(String key, T value, Class<?> classOfT, CacheItemPolicy policy, String regionName)

public:
abstract T^ AddOrGetExistinggeneric<typename T>
( 
   String^ key,
   T^ value,
   CacheItemPolicy^ policy,
   String^ regionName
)

Parameters

key: Unique identifier of the cache item.
value: Data for the cache item.
policy: Expiration policy for the item.
regionName: Optional name of a region in cache.

Type Parameters

T

Return Value

The previous cache entry that matches the specified key, if found. If the cache contains an item with the same key, then it will be returned before it is overwritten. Otherwise, null.

Requirements

Target Platforms

Reference

ObjectCache Class
ObjectCache Members
Overload List