String.LastIndexOfAny Method (Char[], Int32, Int32)
Assembly: mscorlib (in mscorlib.dll)
public int LastIndexOfAny ( char[] anyOf, int startIndex, int count )
public function LastIndexOfAny ( anyOf : char[], startIndex : int, count : int ) : int
Not applicable.
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.
Return Value
The index position of the last occurrence in this instance where any character in anyOf was found; otherwise, -1 if no character in anyOf was found.Index numbering starts from zero.
This method begins searching at the startIndex character position of this instance and proceeds backwards towards the beginning until either a character in anyOf is found or count character positions have been examined. The search 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.LastIndexOf 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 code example finds the index of the last occurrence of any character in the string "aid" within a substring of another string.
// Sample for String::LastIndexOfAny(Char[], Int32, 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; int count; String^ target = "aid"; array<Char>^anyOf = target->ToCharArray(); start = ((str->Length - 1) * 2) / 3; count = (str->Length - 1) / 3; Console::WriteLine( "The last character occurrence from position {0} for {1} characters.", start, count ); 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->LastIndexOfAny( anyOf, start, count ); if ( at > -1 ) Console::Write( at ); else Console::Write( "(not found)" ); Console::Write( "{0}{0}{0}", Environment::NewLine ); } /* This example produces the following results: The last character occurrence from position 44 for 22 characters. 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 'aid' occurs at position: 27 */
// Sample for String.LastIndexOfAny(Char[], Int32, Int32)
import System.*;
class Sample
{
public static void main(String[] args)
{
String br1 = "0----+----1----+----2----+----3----+----4----+----5----+"
+ "----6----+-";
String br2 = "01234567890123456789012345678901234567890123456789012345"
+ "67890123456";
String str = "Now is the time for all good men to come to the aid of "
+ "their party.";
int start;
int at;
int count;
String target = "aid";
char anyOf[] = target.ToCharArray();
start = (str.get_Length() - 1) * 2 / 3;
count = (str.get_Length() - 1) / 3;
Console.WriteLine("The last character occurrence from position {0} "
+ "for {1} characters.", (Int32)start, (Int32)count);
Console.Write("{1}{0}", Environment.get_NewLine(), br1);
Console.Write("{1}{0}", Environment.get_NewLine(), br2);
Console.WriteLine("{1}{0}", Environment.get_NewLine(), str);
Console.Write("A character in '{0}' occurs at position: ", target);
at = str.LastIndexOfAny(anyOf, start, count);
if (at > -1) {
Console.Write(at);
}
else {
Console.Write("(not found)");
}
Console.Write("{0}{0}{0}", Environment.get_NewLine());
} //main
} //Sample
/*
This example produces the following results:
The last character occurrence from position 44 for 22 characters.
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 'aid' occurs at position: 27
*/
Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.