StringSegment.IndexOf 方法

定义

重载

IndexOf(Char, Int32, Int32)

获取 c 字符在此 StringSegment 中的第一个匹配项从零开始的索引。Gets the zero-based index of the first occurrence of the character c in this StringSegment. 搜索从 start 开始,并检查指定数量的 count 字符位置。The search starts at start and examines a specified number of count character positions.

IndexOf(Char)

获取 c 字符在此 StringSegment 中的第一个匹配项从零开始的索引。Gets the zero-based index of the first occurrence of the character c in this StringSegment.

IndexOf(Char, Int32)

获取 c 字符在此 StringSegment 中的第一个匹配项从零开始的索引。Gets the zero-based index of the first occurrence of the character c in this StringSegment. 搜索的起始位置为 startThe search starts at start.

IndexOf(Char, Int32, Int32)

获取 c 字符在此 StringSegment 中的第一个匹配项从零开始的索引。Gets the zero-based index of the first occurrence of the character c in this StringSegment. 搜索从 start 开始,并检查指定数量的 count 字符位置。The search starts at start and examines a specified number of count character positions.

public:
 int IndexOf(char c, int start, int count);
public int IndexOf (char c, int start, int count);
member this.IndexOf : char * int * int -> int
Public Function IndexOf (c As Char, start As Integer, count As Integer) As Integer

参数

c
Char

要查找的 Unicode 字符。The Unicode character to seek.

start
Int32

搜索起始位置的从零开始的索引位置。The zero-based index position at which the search starts.

count
Int32

要检查的字符数。The number of characters to examine.

返回

Int32

如果找到该字符,则为从 StringSegment 的起始位置起 c 从零开始的索引位置;如果未找到,则为 -1。The zero-based index position of c from the beginning of the StringSegment if that character is found, or -1 if it is not.

例外

startcount 小于零,或 start + count 大于 Lengthstart or count is less than zero, or start + count is greater than Length.

适用于

IndexOf(Char)

获取 c 字符在此 StringSegment 中的第一个匹配项从零开始的索引。Gets the zero-based index of the first occurrence of the character c in this StringSegment.

public:
 int IndexOf(char c);
public int IndexOf (char c);
member this.IndexOf : char -> int
Public Function IndexOf (c As Char) As Integer

参数

c
Char

要查找的 Unicode 字符。The Unicode character to seek.

返回

Int32

如果找到该字符,则为从 StringSegment 的起始位置起 c 从零开始的索引位置;如果未找到,则为 -1。The zero-based index position of c from the beginning of the StringSegment if that character is found, or -1 if it is not.

适用于

IndexOf(Char, Int32)

获取 c 字符在此 StringSegment 中的第一个匹配项从零开始的索引。Gets the zero-based index of the first occurrence of the character c in this StringSegment. 搜索的起始位置为 startThe search starts at start.

public:
 int IndexOf(char c, int start);
public int IndexOf (char c, int start);
member this.IndexOf : char * int -> int
Public Function IndexOf (c As Char, start As Integer) As Integer

参数

c
Char

要查找的 Unicode 字符。The Unicode character to seek.

start
Int32

搜索起始位置的从零开始的索引位置。The zero-based index position at which the search starts.

返回

Int32

如果找到该字符,则为从 StringSegment 的起始位置起 c 从零开始的索引位置;如果未找到,则为 -1。The zero-based index position of c from the beginning of the StringSegment if that character is found, or -1 if it is not.

例外

start 大于或等于 Length,或小于零。start is greater than or equal to Length or less than zero.

适用于