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string class : LastIndexOf(string,int) method

Description

Gets the index of the last occurrence of the specified string in the invoker string.

It searches from a specified character position toward the top.

Syntax

stringInstance.LastIndexOf(string searchString, int startPosition)

Arguments

ClassNameDescription
stringsearchStringA search string.
intstartPositionA start position of searching.

Return value

ClassDescription
intIndex of the found position.

Sample code

1:

string str = "abcba";

2:

int index = str.LastIndexOf("b",2); // The result (index) is 1.

Notes

It's a wrapper of the System.String.LastIndexOf(String,int).

However, it has supported to the surrogate characters of UTF-8. In other words, It returns an index as number of characters. Please be aware it is not number of bytes.

The index is zero-based.

Returns -1 if it is not found.

Links for reference

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