ClaimsIdentity.FindFirst Method

Definition

Namespace:

System.Security.Claims

Assembly:

System.Security.Claims.dll

Retrieves the first claim that matches a specified condition.

Overloads

FindFirst(Predicate<Claim>)	Retrieves the first claim that is matched by the specified predicate.
FindFirst(String)	Retrieves the first claim with the specified claim type.

FindFirst(Predicate<Claim>)

Source:

ClaimsIdentity.cs

Retrieves the first claim that is matched by the specified predicate.

public:
 virtual System::Security::Claims::Claim ^ FindFirst(Predicate<System::Security::Claims::Claim ^> ^ match);

public virtual System.Security.Claims.Claim? FindFirst (Predicate<System.Security.Claims.Claim> match);

abstract member FindFirst : Predicate<System.Security.Claims.Claim> -> System.Security.Claims.Claim
override this.FindFirst : Predicate<System.Security.Claims.Claim> -> System.Security.Claims.Claim

Public Overridable Function FindFirst (match As Predicate(Of Claim)) As Claim

Parameters

match

Predicate<Claim>

The function that performs the matching logic.

Returns

Claim

The first matching claim or null if no match is found.

Exceptions

ArgumentNullException

match is null.

FindFirst(String)

Source:

ClaimsIdentity.cs

Retrieves the first claim with the specified claim type.

public:
 virtual System::Security::Claims::Claim ^ FindFirst(System::String ^ type);

public virtual System.Security.Claims.Claim? FindFirst (string type);

abstract member FindFirst : string -> System.Security.Claims.Claim
override this.FindFirst : string -> System.Security.Claims.Claim

Public Overridable Function FindFirst (type As String) As Claim

Parameters

type

String

The claim type to match.

Returns

Claim

The first matching claim or null if no match is found.

Exceptions

ArgumentNullException

type is null.

Remarks

The comparison is done in StringComparison.OrdinalIgnoreCase mode.