String.LastIndexOf Method (Char, Int32, Int32)
Reports the index position of the last occurrence of the specified Unicode character in a substring within this instance. The search starts at a specified character position and examines a specified number of character positions.
Assembly: mscorlib (in mscorlib.dll)
public function LastIndexOf( value : char, startIndex : int, count : int ) : int
- Type: System.Char
A Unicode character to seek.
- Type: System.Int32
The starting position of a substring within this instance.
- Type: System.Int32
The number of character positions to examine.
value is a null reference (Nothing in Visual Basic).
The current instance does not equal String.Empty and startIndex is less than zero, or greater than or equal to the length of this instance.
startIndex + 1 - count is less than zero.
Index numbering starts from zero. That is, the first character in the string is at index zero and the last is at Length - 1.
This method begins searching at the startIndex character position of this instance and proceeds backward toward the beginning until either value is found or count character positions have been examined. For example, if startIndex is Length - 1, the method searches backward count characters from the last character in the string. 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 value 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.
Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.