'Declaration Public Overloads Function AddOrGetExisting(Of T)( _ ByVal key As System.String, _ ByVal value As T, _ ByVal policy As System.Runtime.Caching.CacheItemPolicy, _ Optional ByVal regionName As System.String _ ) As T
'Usage Dim instance As BaseCacheProvider Dim key As System.String Dim value As T Dim policy As System.Runtime.Caching.CacheItemPolicy Dim regionName As System.String Dim value As T value = instance.AddOrGetExisting(Of T)(key, value, policy, regionName)
public T AddOrGetExisting<T>( System.string key, T value, System.Runtime.Caching.CacheItemPolicy policy, System.string regionName )
Parameters
- key
- A unique identifier for the cache entry.
- value
- The object to insert.
- policy
- An object that contains eviction details for the cache entry. This object provides more options for eviction than a simple absolute expiration.
- regionName
- Optional. A named region in the cache to which the cache entry can be added. The default value for the optional parameter is Default
Type Parameters
- T
Return Value
If a cache entry with the same key exists, the specified cache entry's value; otherwise, null.