String::LastIndexOf Method (String, StringComparison)
Reports the zero-based index of the last occurrence of a specified string within the current String object. A parameter specifies the type of search to use for the specified string.
Assembly: mscorlib (in mscorlib.dll)
Parameters
- value
- Type: System::String
The string to seek.
- comparisonType
- Type: System::StringComparison
One of the enumeration values that specifies the rules for the search.
Return Value
Type: System::Int32The index position of the value parameter if that string is found, or -1 if it is not. If value is String::Empty, the return value is the last index position in this instance.
| Exception | Condition |
|---|---|
| ArgumentNullException | value is nullptr. |
| 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 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 search begins at the last character position of this instance and proceeds backward toward the beginning until either value is found or the first character position has been examined.
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.
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.