StringLastIndexOf Method (String, Int32, Int32) |
Reports the zero-based index position of the last occurrence of a specified string within this instance. The search starts at a specified character position and examines a specified number of character positions.
Namespace: SystemAssembly: mscorlib (in mscorlib.dll) Version: 4.0.0.0
Syntax public int LastIndexOf(
string value,
int startIndex,
int count
)
Parameters
- value
- Type: SystemString
The string to seek. - startIndex
- Type: SystemInt32
The search starting position. The search proceeds from startIndex toward the beginning of this instance. - count
- Type: SystemInt32
The number of character positions to examine.
Return Value
Type:
Int32The zero-based index position of
value if that string is found, or -1 if it is not found or if the current instance equals
Empty. If
value is
Empty, the return value is the smaller of
startIndex and the last index position in this instance.
Exceptions Exception | Condition |
---|
ArgumentNullException | value is null. |
ArgumentOutOfRangeException | count is negative.-or-The current instance does not equal Empty, and startIndex is negative.-or- The current instance does not equal Empty, and startIndex is greater than the length of this instance.-or-The current instance does not equal Empty and startIndex - count + 1 specifies a position that is not within this instance. |
See Also