String.IndexOfAny Method (Char[])

May 11, 2014

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)

public int IndexOfAny(
	char[] anyOf
)

Parameters

anyOf
Type: 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.

ExceptionCondition
ArgumentNullException

anyOf is null.

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.

Version Notes

Windows Phone

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

Windows Phone OS

Supported in: 8.1, 8.0, 7.1, 7.0

Windows Phone

Show:
© 2014 Microsoft