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StringIndexOfAny Method
 
System_CAPS_noteNote

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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.

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

public int IndexOfAny(
	char[] anyOf,
	int startIndex
)
public:
int IndexOfAny(
	array<wchar_t>^ anyOf,
	int startIndex
)
member IndexOfAny : 
        anyOf:char[] *
        startIndex:int -> int
Public Function IndexOfAny (
	anyOf As Char(),
	startIndex As Integer
) As Integer

Parameters

anyOf
Type:

A Unicode character array containing one or more characters to seek.

startIndex
Type:

The search starting position.

Return Value

Type:

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.

Exception Condition
ArgumentNullException

anyOf is null.

ArgumentOutOfRangeException

startIndex is negative.

-or-

startIndex is greater than the number of characters in this instance.

Index numbering starts from zero. The startIndex parameter can range from 0 to one less than the length of the string instance.

The search ranges from startIndex to the end of the string.

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 value are the same. To perform a culture-sensitive search, use the CompareInfoIndexOf 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.

The following example finds the index of the occurrence of any character of the string "is" within a substring of another string.

// Sample for String.IndexOfAny(Char[], Int32)
using System;

class Sample {
    public static void Main() 
    {
    string br1 = "0----+----1----+----2----+----3----+----4----+----5----+----6----+-";
    string br2 = "0123456789012345678901234567890123456789012345678901234567890123456";
    string str = "Now is the time for all good men to come to the aid of their party.";
    int start;
    int at;
    string target = "is";
    char[] anyOf = target.ToCharArray();

    start = str.Length/2;
    Console.WriteLine();
    Console.WriteLine("The first character occurrence from position {0} to {1}.", 
                           start, str.Length-1);
    Console.WriteLine("{1}{0}{2}{0}{3}{0}", Environment.NewLine, br1, br2, str);
    Console.Write("A character in '{0}' occurs at position: ", target);

    at = str.IndexOfAny(anyOf, start);
    if (at > -1) 
        Console.Write(at);
    else
        Console.Write("(not found)");
    Console.WriteLine();
    }
}
/*

The first character occurrence from position 33 to 66.
0----+----1----+----2----+----3----+----4----+----5----+----6----+-
0123456789012345678901234567890123456789012345678901234567890123456
Now is the time for all good men to come to the aid of their party.

A character in 'is' occurs at position: 49

*/
' Sample for String.IndexOfAny(Char[], Int32)
Imports System

Class Sample
   Public Shared Sub Main()
      Dim br1 As String = "0----+----1----+----2----+----3----+----4----+----5----+----6----+-"
      Dim br2 As String = "0123456789012345678901234567890123456789012345678901234567890123456"
      Dim str As String = "Now is the time for all good men to come to the aid of their party."
      Dim start As Integer
      Dim at As Integer
      Dim target As String = "is"
      Dim anyOf As Char() = target.ToCharArray()

      start = str.Length / 2
      Console.WriteLine()
      Console.WriteLine("Search for a character occurrence from position {0} to {1}.", _
                           start, str.Length - 1)
      Console.WriteLine("{1}{0}{2}{0}{3}{0}", Environment.NewLine, br1, br2, str)
      Console.Write("A character in '{0}' occurs at position: ", target)
      at = str.IndexOfAny(anyOf, start)
      If at > - 1 Then
         Console.Write(at)
      Else
         Console.Write("(not found)")
      End If
      Console.WriteLine()
   End Sub 'Main
End Class 'Sample
'
'
'Search for a character occurrence from position 33 to 66.
'0----+----1----+----2----+----3----+----4----+----5----+----6----+-
'0123456789012345678901234567890123456789012345678901234567890123456
'Now is the time for all good men to come to the aid of their party.
'
'A character in 'is' occurs at position: 49
'
// Sample for String::IndexOfAny(Char[], Int32)
using namespace System;
int main()
{
   String^ br1 = "0----+----1----+----2----+----3----+----4----+----5----+----6----+-";
   String^ br2 = "0123456789012345678901234567890123456789012345678901234567890123456";
   String^ str = "Now is the time for all good men to come to the aid of their party.";
   int start;
   int at;
   String^ target = "is";
   array<Char>^anyOf = target->ToCharArray();
   start = str->Length / 2;
   Console::WriteLine();
   Console::WriteLine( "The first character occurrence from position {0} to {1}.", start, str->Length - 1 );
   Console::WriteLine( "{1}{0}{2}{0}{3}{0}", Environment::NewLine, br1, br2, str );
   Console::Write( "A character in '{0}' occurs at position: ", target );
   at = str->IndexOfAny( anyOf, start );
   if ( at > -1 )
      Console::Write( at );
   else
      Console::Write( "(not found)" );

   Console::WriteLine();
}

/*

The first character occurrence from position 33 to 66.
0----+----1----+----2----+----3----+----4----+----5----+----6----+-
0123456789012345678901234567890123456789012345678901234567890123456
Now is the time for all good men to come to the aid of their party.

A character in 'is' occurs at position: 49

*/
Universal Windows Platform
Available since 8
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
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