CacheExtensions.TryGetValue<TItem>(IMemoryCache, Object, TItem) Method
Definition
Important
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Tries to get the value associated with the given key and cast it to TItem.
public:
generic <typename TItem>
[System::Runtime::CompilerServices::Extension]
static bool TryGetValue(Microsoft::Extensions::Caching::Memory::IMemoryCache ^ cache, System::Object ^ key, [Runtime::InteropServices::Out] TItem % value);public static bool TryGetValue<TItem>(this Microsoft.Extensions.Caching.Memory.IMemoryCache cache, object key, out TItem? value);static member TryGetValue : Microsoft.Extensions.Caching.Memory.IMemoryCache * obj * 'Item -> bool<Extension()>
Public Function TryGetValue(Of TItem) (cache As IMemoryCache, key As Object, ByRef value As TItem) As BooleanType Parameters
- TItem
The type of the object to get.
Parameters
- cache
- IMemoryCache
The IMemoryCache instance this method extends.
- key
- Object
The key of the value to get.
- value
- TItem
The value associated with the given key, or default(TItem) if the key is not found or the stored value can't be cast to TItem.
Returns
true if the key was found and the stored value can be cast to TItem; false otherwise.
Remarks
This method returns false both when the key is not present in the cache and when the key is present but the stored value can't be cast to TItem. If you need to distinguish between these two cases (for example, in instrumented caches tracking hit/miss metrics), use the non-generic TryGetValue(Object, Object) method instead, which returns true if the key is present regardless of type.
