HttpRequestHeaderCollection.Lookup(String) Method

Reference

Definition

Namespace:: Windows.Web.Http.Headers

Important

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Finds an item in the HttpRequestHeaderCollection if it exists.

public:
 virtual Platform::String ^ Lookup(Platform::String ^ key) = IMap<Platform::String ^, Platform::String ^>::Lookup;

winrt::hstring Lookup(winrt::hstring const& key);

public string Lookup(string key);

function lookup(key)

Public Function Lookup (key As String) As String

Parameters

key: String

The key of the item to lookup.

Returns

String

The value, if an item with the specified key exists. Use the HasKey method to determine whether the key exists.

Implements

Lookup(K)

Remarks

Use the HasKey method to determine whether the key exists in the HttpRequestHeaderCollection.

Applies to

Product	Versions
WinRT	Build 10240, Build 10586, Build 14383, Build 15063, Build 16299, Build 17134, Build 17763, Build 18362, Build 19041, Build 20348, Build 22000, Build 22621, Build 26100

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