JsonObject.HasKey(String) Method

Reference

Definition

Namespace:: Windows.Data.Json

Important

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Edit

Indicates whether the JsonObject has an entry with the requested key.

public:
 virtual bool HasKey(Platform::String ^ key) = IMap<Platform::String ^, IJsonValue ^>::HasKey;

bool HasKey(winrt::hstring const& key);

public bool HasKey(string key);

function hasKey(key)

Public Function HasKey (key As String) As Boolean

Parameters

key: String

The requested key.

Returns

Boolean

true if the JsonObject has an entry with the requested key; otherwise, false.

Implements

HasKey(K)

Remarks

In C# and other languages that use .NET language projection, use the ContainsKey method instead of the HasKey method. The JsonObject class inherits HasKey from the IMap<String,IJsonValue> interface. However, this interface appears to .NET code as IDictionary<TKey,TValue> due to .NET language projection. Therefore, .NET code must use the ContainsKey method of the IDictionary<TKey,TValue> interface instead of the HasKey method of the IMap<String,IJsonValue> interface.

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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