DictionaryExtensionsGetValueOrDefaultTKey, TValue(IDictionaryTKey, TValue, TKey, FuncTValue) Method

Tries to get a value from a dictionary for the given key.
See the Examples section of the GetValueOrDefaultTActualValue(IDictionaryString, Object, String, TActualValue) method for some examples.

Definition

Namespace: KGySoft.CoreLibraries
Assembly: KGySoft.CoreLibraries (in KGySoft.CoreLibraries.dll) Version: 10.0.0

C#

public static TValue GetValueOrDefault<TKey, TValue>(
	this IDictionary<TKey, TValue> dictionary,
	TKey key,
	Func<TValue> defaultValueFactory
)

VB

<ExtensionAttribute>
Public Shared Function GetValueOrDefault(Of TKey, TValue) ( 
	dictionary As IDictionary(Of TKey, TValue),
	key As TKey,
	defaultValueFactory As Func(Of TValue)
) As TValue

C++

public:
[ExtensionAttribute]
generic<typename TKey, typename TValue>
static TValue GetValueOrDefault(
	IDictionary<TKey, TValue>^ dictionary, 
	TKey key, 
	Func<TValue>^ defaultValueFactory
)

F#

[<ExtensionAttribute>]
static member GetValueOrDefault : 
        dictionary : IDictionary<'TKey, 'TValue> * 
        key : 'TKey * 
        defaultValueFactory : Func<'TValue> -> 'TValue

Parameters

dictionary IDictionaryTKey, TValue: The dictionary.
key TKey: The key whose value to get.
defaultValueFactory FuncTValue: A delegate that can be invoked to return a default value if key was not found..

Type Parameters

TKey: The type of the stored keys in the dictionary.
TValue: Type of the stored values in the dictionary.

Return Value

TValue
The found value or the result of defaultValueFactory if key was not found in the dictionary.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IDictionaryTKey, TValue. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).