• Article

String.IndexOfAny Method (array<Char[])

Microsoft Silverlight will reach end of support after October 2021. Learn more.

Reports the zero-based index of the first occurrence in this instance of any character in a specified array of Unicode characters.

Namespace:  System
Assembly:  mscorlib (in mscorlib.dll)

Syntax

'Declaration
Public Function IndexOfAny ( _
    anyOf As Char() _
) As Integer

public int IndexOfAny(
    char[] anyOf
)

Parameters

  • anyOf
    Type: array<System.Char[]
    A Unicode character array containing one or more characters to seek.

Return Value

Type: System.Int32
The zero-based index position of the first occurrence in this instance where any character in anyOf was found; otherwise, -1 if no character in anyOf was found.

Exceptions

Exception Condition
ArgumentNullException

anyOf is nulla null reference (Nothing in Visual Basic).

Remarks

Index numbering starts from zero.

The search for anyOf is case-sensitive.

This method performs an ordinal (culture-insensitive) search, where a character is considered equivalent to another character only if their Unicode scalar values are the same. To perform a culture-sensitive search, use the CompareInfo.IndexOf method, where a Unicode scalar value representing a precomposed character, such as the ligature 'Æ' (U+00C6), might be considered equivalent to any occurrence of the character's components in the correct sequence, such as "AE" (U+0041, U+0045), depending on the culture.

Platform Notes

Silverlight for Windows Phone Silverlight for Windows Phone

 If you pass an invalid parameter value, IndexOfAny throws an ArgumentOutOfRangeException instead of an ArgumentNullException.

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.