IFormCollection.ContainsKey(String) Method

Reference

Definition

Namespace:: Microsoft.AspNetCore.Http

Assembly:: Microsoft.AspNetCore.Http.Features.dll

Package:: Microsoft.AspNetCore.Http.Features v1.0.0

Package:: Microsoft.AspNetCore.Http.Features v1.1.0

Package:: Microsoft.AspNetCore.Http.Features v2.0.0

Package:: Microsoft.AspNetCore.Http.Features v2.1.0

Package:: Microsoft.AspNetCore.Http.Features v2.2.0

Package:: Microsoft.AspNetCore.Http.Features v3.0.3

Package:: Microsoft.AspNetCore.Http.Features v3.1.18

Package:: Microsoft.AspNetCore.Http.Features v5.0.9

Package:: Microsoft.AspNetCore.App.Ref v6.0.6

Package:: Microsoft.AspNetCore.App.Ref v7.0.5

Package:: Microsoft.AspNetCore.App.Ref v8.0.0

Package:: Microsoft.AspNetCore.App.Ref v9.0.0

Source:: IFormCollection.cs

Important

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Determines whether the IFormCollection contains an element with the specified key.

public:
 bool ContainsKey(System::String ^ key);

public bool ContainsKey (string key);

abstract member ContainsKey : string -> bool

Public Function ContainsKey (key As String) As Boolean

Parameters

key: String

The key to locate in the IFormCollection.

Returns

Boolean

true if the IFormCollection contains an element with the key; otherwise, false.

Exceptions

ArgumentNullException

key is null.

Applies to

Product	Versions
ASP.NET Core	1.0, 1.1, 2.0, 2.1, 2.2, 3.0, 3.1, 5.0, 6.0, 7.0, 8.0, 9.0

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