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String::LastIndexOf Method (String, Int32, Int32, StringComparison)

Reports the index position of the last occurrence of a specified String object within this instance. Parameters specify the starting search position in the current string, the number of characters in the current string to search, and the type of search to use for the specified string.

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

public:
int LastIndexOf(
	String^ value, 
	int startIndex, 
	int count, 
	StringComparison comparisonType
)

Parameters

value
Type: System::String

The String object to seek.

startIndex
Type: System::Int32

The search starting position.

count
Type: System::Int32

The number of character positions to examine.

comparisonType
Type: System::StringComparison

One of the System::StringComparison values.

Return Value

Type: System::Int32
The index position of the value parameter if that string is found, or -1 if it is not found or if the current instance equals String::Empty. If value is Empty, the return value is startIndex.

ExceptionCondition
ArgumentNullException

value is nullptr.

ArgumentOutOfRangeException

The current instance does not equal String::Empty and count or startIndex is negative.

-or-

startIndex is greater than the length of this instance.

-or-

startIndex + 1 - count specifies a position that is not within this instance.

ArgumentException

comparisonType is not a valid System::StringComparison value.

Index numbering starts from zero. That is, the first character in the string is at index zero and the last is at Length - 1.

The search begins at the startIndex character position and proceeds backward 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 comparisonType parameter specifies to search for the value parameter using the current or invariant culture, using a case-sensitive or case-insensitive search, and using word or ordinal comparison rules.

The following example demonstrates three overloads of the LastIndexOf method that find the last occurrence of a string within another string using different values of the StringComparison enumeration.

No code example is currently available or this language may not be supported.

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.

.NET Framework

Supported in: 3.5, 3.0, 2.0

.NET Compact Framework

Supported in: 3.5, 2.0

XNA Framework

Supported in: 3.0, 2.0, 1.0
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