IndexOf Method (Char, Int32, Int32)
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Reports the zero-based index of the first occurrence of the specified character in this instance. The search starts at a specified character position and examines a specified number of character positions.
Namespace: System
Assembly: mscorlib (in mscorlib.dll)
Syntax
'Declaration
Public Function IndexOf ( _
value As Char, _
startIndex As Integer, _
count As Integer _
) As Integer
public int IndexOf(
char value,
int startIndex,
int count
)
public:
int IndexOf(
wchar_t value,
int startIndex,
int count
)
member IndexOf :
value:char *
startIndex:int *
count:int -> int
public function IndexOf(
value : char,
startIndex : int,
count : int
) : int
Parameters
- value
Type: System. . :: . .Char
A Unicode character to seek.
- startIndex
Type: System. . :: . .Int32
The search starting position.
- 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.
Exceptions
| Exception | Condition |
|---|---|
| ArgumentOutOfRangeException | count or startIndex is negative. -or- startIndex is greater than the length of this string. -or- count is greater than the length of this string minus startIndex. |
Remarks
The search begins at startIndex and continues to startIndex + count -1. The character at startIndex + count is not included in the search.
Index numbering starts from 0 (zero). The startIndex parameter can range from 0 to the length of the string instance.
.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.