C# String IndexOfAny(Char[], Int32, Int32)

Description

String IndexOfAny(Char[], Int32, Int32) reports the zero-based index of the first occurrence in this instance of any character in a specified array of Unicode characters. The search starts at a specified character position and examines a specified number of character positions.

Syntax

String.IndexOfAny(Char[], Int32, Int32) has the following syntax.

public int IndexOfAny(
  char[] anyOf,//from w ww  .  j a v  a  2 s  . co  m
  int startIndex,
  int count
)

Parameters

String.IndexOfAny(Char[], Int32, Int32) has the following parameters.

• anyOf - A Unicode character array containing one or more characters to seek.
• startIndex - The search starting position.
• count - The number of character positions to examine.

Returns

String.IndexOfAny(Char[], Int32, Int32) method returns The zero-based index position of the first occurrence in this instance where any character in anyOf was found; -1 if no character in anyOf was found.

Example

Sample for String.IndexOfAny(Char[], Int32, Int32)

//  ww w.j  a va2 s  . c o  m
using System;

class Sample {
    public static void Main() 
    {
        string str = "This is a test";
        int start;
        int at;
        int count;
        string target = "a";
        char[] anyOf = target.ToCharArray();
    
        start = (str.Length-1)/3;
        count = (str.Length-1)/4;
    
        at = str.IndexOfAny(anyOf, start, count);
        if (at > -1) 
            Console.Write(at);
        else
            Console.Write("(not found)");
    }
}

The code above generates the following result.