FindIndex<TTarget>(Int32,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 range of elements in the List that extends from the specified index to the last element.

Syntax

Visual Basic
C#

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

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

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

Parameters

startIndex: The zero-based starting index of the search.
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.ArgumentOutOfRangeException	startIndex is outside the range of valid indexes for the List.
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