LastIndexOf Method (Char, Int32, Int32)
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Reports the zero-based 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 proceeds backward toward the beginning of the string for a specified number of character positions.
Namespace: System
Assembly: mscorlib (in mscorlib.dll)
Syntax
'Declaration
Public Function LastIndexOf ( _
value As Char, _
startIndex As Integer, _
count As Integer _
) As Integer
public int LastIndexOf(
char value,
int startIndex,
int count
)
public:
int LastIndexOf(
wchar_t value,
int startIndex,
int count
)
member LastIndexOf :
value:char *
startIndex:int *
count:int -> int
public function LastIndexOf(
value : char,
startIndex : int,
count : int
) : int
Parameters
- value
Type: System. . :: . .Char
The Unicode character to seek.
- startIndex
Type: System. . :: . .Int32
The starting position of the search. The search proceeds from startIndex toward the beginning of this instance.
- count
Type: System. . :: . .Int32
The number of character positions to examine.
Return Value
Type: System. . :: . .Int32
The zero-based index position of value if that character is found, or -1 if it is not found or if the current instance equals String..::..Empty.
Remarks
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 and proceeds backward toward the beginning of this instance 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.
.NET Framework Security
- Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see dd66cd4c-b087-415f-9c3e-94e3a1835f74.