FindIndex<TTarget>(Predicate<TTarget>) Method

Searches for an element that matches the conditions defined by the specified predicate, and returns the zero-based index of the first occurrence within the entire List.

Syntax

Visual Basic
C#

'Declaration
 
Public Overloads Function FindIndex(Of TTarget As T)( _
   ByVal match As Predicate(Of TTarget) _
) As Integer

'Usage
 
Dim instance As CollectionBase(Of T)
Dim match As Predicate(Of TTarget)
Dim value As Integer
 
value = instance.FindIndex(Of TTarget)(match)

public int FindIndex<TTarget>( 
   Predicate<TTarget> match
)
where TTarget: T

Parameters

match: The Predicate delegate that defines the conditions of the element to search for.

Type Parameters

TTarget

Return Value

The zero-based index of the first occurrence of an element that matches the conditions defined by match, if found; otherwise, false.

Exceptions

Exception	Description
System.ArgumentNullException	match is null.

Requirements

Target Platforms: Windows 2000 Professional (SP4), Windows 2000 Server, Windows 2003 Server (SP1), Windows Server 2012 R2, Windows 2008, Windows XP (SP2), Windows Vista, Windows 7, Windows 8, Windows 8.1, Windows 10

Reference

CollectionBase<T> Class
CollectionBase<T> Members
Overload List