AddOrGetExisting(String,Object,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 override object AddOrGetExisting( 
   string key,
   object value,
   CacheItemPolicy policy,
   string regionName
)

'Declaration

Public Overloads Overrides Function AddOrGetExisting( _
   ByVal key As String, _
   ByVal value As Object, _
   ByVal policy As CacheItemPolicy, _
   ByVal regionName As String _
) As Object

'Usage

Dim instance As FileCache
Dim key As String
Dim value As Object
Dim policy As CacheItemPolicy
Dim regionName As String
Dim value As Object
 
value = instance.AddOrGetExisting(key, value, policy, regionName)

public:
Object^ AddOrGetExisting( 
   String^ key,
   Object^ value,
   CacheItemPolicy^ policy,
   String^ regionName
) override

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.

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

FileCache Class
FileCache Members
Overload List