String.LastIndexOfAny 方法

定義

報告 Unicode 陣列中的一或多個指定的字元,在這個執行個體中最後一次出現時的所在索引 (以零為起始)。Reports the zero-based index position of the last occurrence in this instance of one or more characters specified in a Unicode array. 如果在此執行個體中找不到陣列中的字元,此方法會傳回 -1。The method returns -1 if the characters in the array are not found in this instance.

多載

LastIndexOfAny(Char[], Int32)

報告 Unicode 陣列中的一或多個指定的字元,在這個執行個體中最後一次出現時的所在索引 (以零為起始)。Reports the zero-based index position of the last occurrence in this instance of one or more characters specified in a Unicode array. 搜尋會從指定的字元位置開始,然後反向朝字串的開頭進行。The search starts at a specified character position and proceeds backward toward the beginning of the string.

LastIndexOfAny(Char[], Int32, Int32)

報告 Unicode 陣列中的一或多個指定的字元,在這個執行個體中最後一次出現時的所在索引 (以零為起始)。Reports the zero-based index position of the last occurrence in this instance of one or more characters specified in a Unicode array. 搜尋會從指定的字元位置開始,然後反向朝字串開頭指定數目的字元位置進行。The search starts at a specified character position and proceeds backward toward the beginning of the string for a specified number of character positions.

LastIndexOfAny(Char[])

報告 Unicode 陣列中的一或多個指定的字元,在這個執行個體中最後一次出現時的所在索引 (以零為起始)。Reports the zero-based index position of the last occurrence in this instance of one or more characters specified in a Unicode array.

LastIndexOfAny(Char[], Int32)

報告 Unicode 陣列中的一或多個指定的字元,在這個執行個體中最後一次出現時的所在索引 (以零為起始)。Reports the zero-based index position of the last occurrence in this instance of one or more characters specified in a Unicode array. 搜尋會從指定的字元位置開始,然後反向朝字串的開頭進行。The search starts at a specified character position and proceeds backward toward the beginning of the string.

public:
 int LastIndexOfAny(cli::array <char> ^ anyOf, int startIndex);
public int LastIndexOfAny (char[] anyOf, int startIndex);
member this.LastIndexOfAny : char[] * int -> int
Public Function LastIndexOfAny (anyOf As Char(), startIndex As Integer) As Integer

參數

anyOf
Char[]

Unicode 字元陣列,含有一或多個要搜尋的字元。A Unicode character array containing one or more characters to seek.

startIndex
Int32

搜尋開始位置。The search starting position. 搜尋會從 startIndex 朝這個執行個體的開頭進行。The search proceeds from startIndex toward the beginning of this instance.

傳回

所找到之 anyOf 的任何字元,在這個執行個體中最後一次出現的索引位置;如果找不到 anyOf 中的字元,或目前的執行個體等於 Empty,則為 -1。The index position of the last occurrence in this instance where any character in anyOf was found; -1 if no character in anyOf was found or if the current instance equals Empty.

例外狀況

anyOfnullanyOf is null.

目前的執行個體不等於 Empty,且 startIndex 指定的位置不在這個執行個體之內。The current instance does not equal Empty, and startIndex specifies a position that is not within this instance.

範例

下列範例會在另一個字串的子字串中,尋找字串 "is" 中任何字元的最後一次出現的索引。The following example finds the index of the last occurrence of any character in the string "is" within a substring of another string.

// Sample for String::LastIndexOfAny(Char, Int32)
using namespace System;
int main()
{
   String^ br1 = "0----+----1----+----2----+----3----+----4----+----5----+----6----+-";
   String^ br2 = "0123456789012345678901234567890123456789012345678901234567890123456";
   String^ str = "Now is the time for all good men to come to the aid of their party.";
   int start;
   int at;
   String^ target = "is";
   array<Char>^anyOf = target->ToCharArray();
   start = (str->Length - 1) / 2;
   Console::WriteLine( "The last character occurrence  from position {0} to 0.", start );
   Console::WriteLine( "{1}{0}{2}{0}{3}{0}", Environment::NewLine, br1, br2, str );
   Console::Write( "A character in '{0}' occurs at position: ", target );
   at = str->LastIndexOfAny( anyOf, start );
   if ( at > -1 )
      Console::Write( at );
   else
      Console::Write( "(not found)" );

   Console::Write( "{0}{0}{0}", Environment::NewLine );
}

/*
This example produces the following results:
The last character occurrence  from position 33 to 0.
0----+----1----+----2----+----3----+----4----+----5----+----6----+-
0123456789012345678901234567890123456789012345678901234567890123456
Now is the time for all good men to come to the aid of their party.

A character in 'is' occurs at position: 12


*/
// Sample for String.LastIndexOfAny(Char[], Int32)
using System;

class Sample {
    public static void Main() {

    string br1 = "0----+----1----+----2----+----3----+----4----+----5----+----6----+-";
    string br2 = "0123456789012345678901234567890123456789012345678901234567890123456";
    string str = "Now is the time for all good men to come to the aid of their party.";
    int start;
    int at;
    string target = "is";
    char[] anyOf = target.ToCharArray();

    start = (str.Length-1)/2;
    Console.WriteLine("The last character occurrence  from position {0} to 0.", start);
    Console.WriteLine("{1}{0}{2}{0}{3}{0}", Environment.NewLine, br1, br2, str);
    Console.Write("A character in '{0}' occurs at position: ", target);

    at = str.LastIndexOfAny(anyOf, start);
    if (at > -1) 
        Console.Write(at);
    else
        Console.Write("(not found)");
    Console.Write("{0}{0}{0}", Environment.NewLine);
    }
}
/*
This example produces the following results:
The last character occurrence  from position 33 to 0.
0----+----1----+----2----+----3----+----4----+----5----+----6----+-
0123456789012345678901234567890123456789012345678901234567890123456
Now is the time for all good men to come to the aid of their party.

A character in 'is' occurs at position: 12


*/
' Sample for String.LastIndexOfAny(Char[], Int32)
 _

Class Sample
   
   Public Shared Sub Main()
      
      Dim br1 As String = "0----+----1----+----2----+----3----+----4----+----5----+----6----+-"
      Dim br2 As String = "0123456789012345678901234567890123456789012345678901234567890123456"
      Dim str As String = "Now is the time for all good men to come to the aid of their party."
      Dim start As Integer
      Dim at As Integer
      Dim target As String = "is"
      Dim anyOf As Char() = target.ToCharArray()
      
      start =(str.Length - 1) / 2
      Console.WriteLine("The last character occurrence  from position {0} to 0.", start)
      Console.WriteLine("{1}{0}{2}{0}{3}{0}", Environment.NewLine, br1, br2, str)
      Console.Write("A character in '{0}' occurs at position: ", target)
      
      at = str.LastIndexOfAny(anyOf, start)
      If at > - 1 Then
         Console.Write(at)
      Else
         Console.Write("(not found)")
      End If
      Console.Write("{0}{0}{0}", Environment.NewLine)
   End Sub
End Class
'
'This example produces the following results:
'The last character occurrence  from position 33 to 0.
'0----+----1----+----2----+----3----+----4----+----5----+----6----+-
'0123456789012345678901234567890123456789012345678901234567890123456
'Now is the time for all good men to come to the aid of their party.
'
'A character in 'is' occurs at position: 12
'
'
'

備註

索引編號從零開始。Index numbering starts from zero.

這個方法會開始在這個實例的 startIndex 字元位置進行搜尋,並向前繼續進行,直到找到 anyOf 中的字元或已檢查過第一個字元的位置為止。This method begins searching at the startIndex character position of this instance and proceeds backward toward the beginning until either a character in anyOf is found or the first character position has been examined. 搜尋會區分大小寫。The search is case-sensitive.

這個方法會執行序數(不區分文化特性)的搜尋,其中字元只有在 Unicode 純量值相同時,才會被視為與另一個字元相等。This method performs an ordinal (culture-insensitive) search, where a character is considered equivalent to another character only if their Unicode scalar values are the same. 若要執行區分文化特性的搜尋,請使用 CompareInfo.LastIndexOf 方法,其中代表 precomposed 字元的 Unicode 純量值(例如,連字 "Æ" (U + 00C6))可能會被視為等同于任何出現在正確的字元元件中。順序,例如 "AE" (U + 0041,U + 0045),視文化特性而定。To perform a culture-sensitive search, use the CompareInfo.LastIndexOf method, where a Unicode scalar value representing a precomposed character, such as the ligature "Æ" (U+00C6), might be considered equivalent to any occurrence of the character's components in the correct sequence, such as "AE" (U+0041, U+0045), depending on the culture.

另請參閱

LastIndexOfAny(Char[], Int32, Int32)

報告 Unicode 陣列中的一或多個指定的字元,在這個執行個體中最後一次出現時的所在索引 (以零為起始)。Reports the zero-based index position of the last occurrence in this instance of one or more characters specified in a Unicode array. 搜尋會從指定的字元位置開始,然後反向朝字串開頭指定數目的字元位置進行。The search starts at a specified character position and proceeds backward toward the beginning of the string for a specified number of character positions.

public:
 int LastIndexOfAny(cli::array <char> ^ anyOf, int startIndex, int count);
public int LastIndexOfAny (char[] anyOf, int startIndex, int count);
member this.LastIndexOfAny : char[] * int * int -> int
Public Function LastIndexOfAny (anyOf As Char(), startIndex As Integer, count As Integer) As Integer

參數

anyOf
Char[]

Unicode 字元陣列,含有一或多個要搜尋的字元。A Unicode character array containing one or more characters to seek.

startIndex
Int32

搜尋開始位置。The search starting position. 搜尋會從 startIndex 朝這個執行個體的開頭進行。The search proceeds from startIndex toward the beginning of this instance.

count
Int32

要檢視的字元位置數目。The number of character positions to examine.

傳回

所找到之 anyOf 的任何字元,在這個執行個體中最後一次出現的索引位置;如果找不到 anyOf 中的字元,或目前的執行個體等於 Empty,則為 -1。The index position of the last occurrence in this instance where any character in anyOf was found; -1 if no character in anyOf was found or if the current instance equals Empty.

例外狀況

anyOfnullanyOf is null.

目前的執行個體不等於 Empty,且 countstartIndex 為負。The current instance does not equal Empty, and count or startIndex is negative.

-或--or- 目前的執行個體不等於 Empty,且 startIndex - count + 1 小於零。The current instance does not equal Empty, and startIndex minus count + 1 is less than zero.

範例

下列範例會在另一個字串的子字串中,尋找字串 "輔助" 中任何字元的最後一次出現的索引。The following example finds the index of the last occurrence of any character in the string "aid" within a substring of another string.

// Sample for String::LastIndexOfAny(Char[], Int32, Int32)
using namespace System;
int main()
{
   String^ br1 = "0----+----1----+----2----+----3----+----4----+----5----+----6----+-";
   String^ br2 = "0123456789012345678901234567890123456789012345678901234567890123456";
   String^ str = "Now is the time for all good men to come to the aid of their party.";
   int start;
   int at;
   int count;
   String^ target = "aid";
   array<Char>^anyOf = target->ToCharArray();
   start = ((str->Length - 1) * 2) / 3;
   count = (str->Length - 1) / 3;
   Console::WriteLine( "The last character occurrence from position {0} for {1} characters.", start, count );
   Console::WriteLine( "{1}{0}{2}{0}{3}{0}", Environment::NewLine, br1, br2, str );
   Console::Write( "A character in '{0}' occurs at position: ", target );
   at = str->LastIndexOfAny( anyOf, start, count );
   if ( at > -1 )
      Console::Write( at );
   else
      Console::Write( "(not found)" );

   Console::Write( "{0}{0}{0}", Environment::NewLine );
}

/*
This example produces the following results:
The last character occurrence from position 44 for 22 characters.
0----+----1----+----2----+----3----+----4----+----5----+----6----+-
0123456789012345678901234567890123456789012345678901234567890123456
Now is the time for all good men to come to the aid of their party.

A character in 'aid' occurs at position: 27
*/
// Sample for String.LastIndexOfAny(Char[], Int32, Int32)
using System;

class Sample {
    public static void Main() {

    string br1 = "0----+----1----+----2----+----3----+----4----+----5----+----6----+-";
    string br2 = "0123456789012345678901234567890123456789012345678901234567890123456";
    string str = "Now is the time for all good men to come to the aid of their party.";
    int start;
    int at;
    int count;
    string target = "aid";
    char[] anyOf = target.ToCharArray();

    start = ((str.Length-1)*2)/3;
    count = (str.Length-1)/3;
    Console.WriteLine("The last character occurrence from position {0} for {1} characters.", start, count);
    Console.WriteLine("{1}{0}{2}{0}{3}{0}", Environment.NewLine, br1, br2, str);
    Console.Write("A character in '{0}' occurs at position: ", target);

    at = str.LastIndexOfAny(anyOf, start, count);
    if (at > -1) 
        Console.Write(at);
    else
        Console.Write("(not found)");
    Console.Write("{0}{0}{0}", Environment.NewLine);
    }
}
/*
This example produces the following results:
The last character occurrence from position 44 for 22 characters.
0----+----1----+----2----+----3----+----4----+----5----+----6----+-
0123456789012345678901234567890123456789012345678901234567890123456
Now is the time for all good men to come to the aid of their party.

A character in 'aid' occurs at position: 27
*/
' Sample for String.LastIndexOfAny(Char[], Int32, Int32)
 _

Class Sample
   
   Public Shared Sub Main()
      
      Dim br1 As String = "0----+----1----+----2----+----3----+----4----+----5----+----6----+-"
      Dim br2 As String = "0123456789012345678901234567890123456789012345678901234567890123456"
      Dim str As String = "Now is the time for all good men to come to the aid of their party."
      Dim start As Integer
      Dim at As Integer
      Dim count As Integer
      Dim target As String = "aid"
      Dim anyOf As Char() = target.ToCharArray()
      
      start =(str.Length - 1) * 2 / 3
      count =(str.Length - 1) / 3
      Console.WriteLine("The last character occurrence from position {0} for {1} characters.", start, count)
      Console.WriteLine("{1}{0}{2}{0}{3}{0}", Environment.NewLine, br1, br2, str)
      Console.Write("A character in '{0}' occurs at position: ", target)
      
      at = str.LastIndexOfAny(anyOf, start, count)
      If at > - 1 Then
         Console.Write(at)
      Else
         Console.Write("(not found)")
      End If
      Console.Write("{0}{0}{0}", Environment.NewLine)
   End Sub
End Class
'
'This example produces the following results:
'The last character occurrence from position 44 for 22 characters.
'0----+----1----+----2----+----3----+----4----+----5----+----6----+-
'0123456789012345678901234567890123456789012345678901234567890123456
'Now is the time for all good men to come to the aid of their party.
'
'A character in 'aid' occurs at position: 27
'

備註

索引編號從零開始。Index numbering starts from zero.

這個方法會開始在這個實例的 startIndex 字元位置進行搜尋,並向前繼續進行,直到找到 anyOf 中的字元或已檢查 count 的字元位置為止。This method begins searching at the startIndex character position of this instance and proceeds backward toward the beginning until either a character in anyOf is found or count character positions have been examined. 搜尋會區分大小寫。The search is case-sensitive.

這個方法會執行序數(不區分文化特性)的搜尋,其中字元只有在 Unicode 純量值相同時,才會被視為與另一個字元相等。This method performs an ordinal (culture-insensitive) search, where a character is considered equivalent to another character only if their Unicode scalar values are the same. 若要執行區分文化特性的搜尋,請使用 CompareInfo.LastIndexOf 方法,其中代表 precomposed 字元的 Unicode 純量值(例如,連字 "Æ" (U + 00C6))可能會被視為等同于任何出現在正確的字元元件中。順序,例如 "AE" (U + 0041,U + 0045),視文化特性而定。To perform a culture-sensitive search, use the CompareInfo.LastIndexOf method, where a Unicode scalar value representing a precomposed character, such as the ligature "Æ" (U+00C6), might be considered equivalent to any occurrence of the character's components in the correct sequence, such as "AE" (U+0041, U+0045), depending on the culture.

另請參閱

LastIndexOfAny(Char[])

報告 Unicode 陣列中的一或多個指定的字元,在這個執行個體中最後一次出現時的所在索引 (以零為起始)。Reports the zero-based index position of the last occurrence in this instance of one or more characters specified in a Unicode array.

public:
 int LastIndexOfAny(cli::array <char> ^ anyOf);
public int LastIndexOfAny (char[] anyOf);
member this.LastIndexOfAny : char[] -> int
Public Function LastIndexOfAny (anyOf As Char()) As Integer

參數

anyOf
Char[]

Unicode 字元陣列,含有一或多個要搜尋的字元。A Unicode character array containing one or more characters to seek.

傳回

這個執行個體中最後項目的索引位置,其中找到了 anyOf 中的任何字元,如果 anyOf 中沒有找到任何字元,則為 -1。The index position of the last occurrence in this instance where any character in anyOf was found; -1 if no character in anyOf was found.

例外狀況

anyOfnullanyOf is null.

範例

下列範例會在另一個字串中,尋找字串 "is" 中任何字元最後一次出現的索引。The following example finds the index of the last occurrence of any character in the string "is" within another string.

// Sample for String::LastIndexOfAny(Char[])
using namespace System;
int main()
{
   String^ br1 = "0----+----1----+----2----+----3----+----4----+----5----+----6----+-";
   String^ br2 = "0123456789012345678901234567890123456789012345678901234567890123456";
   String^ str = "Now is the time for all good men to come to the aid of their party.";
   int start;
   int at;
   String^ target = "is";
   array<Char>^anyOf = target->ToCharArray();
   start = str->Length - 1;
   Console::WriteLine( "The last character occurrence  from position {0} to 0.", start );
   Console::WriteLine( "{1}{0}{2}{0}{3}{0}", Environment::NewLine, br1, br2, str );
   Console::Write( "A character in '{0}' occurs at position: ", target );
   at = str->LastIndexOfAny( anyOf );
   if ( at > -1 )
      Console::Write( at );
   else
      Console::Write( "(not found)" );

   Console::Write( "{0}{0}{0}", Environment::NewLine );
}

/*
This example produces the following results:
The last character occurrence  from position 66 to 0.
0----+----1----+----2----+----3----+----4----+----5----+----6----+-
0123456789012345678901234567890123456789012345678901234567890123456
Now is the time for all good men to come to the aid of their party.

A character in 'is' occurs at position: 58


*/
// Sample for String.LastIndexOfAny(Char[])
using System;

class Sample {
    public static void Main() {

    string br1 = "0----+----1----+----2----+----3----+----4----+----5----+----6----+-";
    string br2 = "0123456789012345678901234567890123456789012345678901234567890123456";
    string str = "Now is the time for all good men to come to the aid of their party.";
    int start;
    int at;
    string target = "is";
    char[] anyOf = target.ToCharArray();

    start = str.Length-1;
    Console.WriteLine("The last character occurrence  from position {0} to 0.", start);
    Console.WriteLine("{1}{0}{2}{0}{3}{0}", Environment.NewLine, br1, br2, str);
    Console.Write("A character in '{0}' occurs at position: ", target);

    at = str.LastIndexOfAny(anyOf);
    if (at > -1) 
        Console.Write(at);
    else
        Console.Write("(not found)");
    Console.Write("{0}{0}{0}", Environment.NewLine);
    }
}
/*
This example produces the following results:
The last character occurrence  from position 66 to 0.
0----+----1----+----2----+----3----+----4----+----5----+----6----+-
0123456789012345678901234567890123456789012345678901234567890123456
Now is the time for all good men to come to the aid of their party.

A character in 'is' occurs at position: 58


*/
' Sample for String.LastIndexOfAny(Char[])
 _

Class Sample
   
   Public Shared Sub Main()
      
      Dim br1 As String = "0----+----1----+----2----+----3----+----4----+----5----+----6----+-"
      Dim br2 As String = "0123456789012345678901234567890123456789012345678901234567890123456"
      Dim str As String = "Now is the time for all good men to come to the aid of their party."
      Dim start As Integer
      Dim at As Integer
      Dim target As String = "is"
      Dim anyOf As Char() = target.ToCharArray()
      
      start = str.Length - 1
      Console.WriteLine("The last character occurrence  from position {0} to 0.", start)
      Console.WriteLine("{1}{0}{2}{0}{3}{0}", Environment.NewLine, br1, br2, str)
      Console.Write("A character in '{0}' occurs at position: ", target)
      
      at = str.LastIndexOfAny(anyOf)
      If at > - 1 Then
         Console.Write(at)
      Else
         Console.Write("(not found)")
      End If
      Console.Write("{0}{0}{0}", Environment.NewLine)
   End Sub
End Class
'
'This example produces the following results:
'The last character occurrence  from position 66 to 0.
'0----+----1----+----2----+----3----+----4----+----5----+----6----+-
'0123456789012345678901234567890123456789012345678901234567890123456
'Now is the time for all good men to come to the aid of their party.
'
'A character in 'is' occurs at position: 58
'
'
'

備註

索引編號從零開始。Index numbering starts from zero.

這個方法會開始在這個實例的最後一個字元位置進行搜尋,並向前繼續進行,直到找到 anyOf 中的字元,或已檢查過第一個字元的位置。This method begins searching at the last character position of this instance and proceeds backward toward the beginning until either a character in anyOf is found or the first character position has been examined. 搜尋會區分大小寫。The search is case-sensitive.

這個方法會執行序數(不區分文化特性)的搜尋,其中字元只有在 Unicode 純量值相同時,才會被視為與另一個字元相等。This method performs an ordinal (culture-insensitive) search, where a character is considered equivalent to another character only if their Unicode scalar values are the same. 若要執行區分文化特性的搜尋,請使用 CompareInfo.LastIndexOf 方法,其中代表 precomposed 字元的 Unicode 純量值(例如,連字 "Æ" (U + 00C6))可能會被視為等同于任何出現在正確的字元元件中。順序,例如 "AE" (U + 0041,U + 0045),視文化特性而定。To perform a culture-sensitive search, use the CompareInfo.LastIndexOf method, where a Unicode scalar value representing a precomposed character, such as the ligature "Æ" (U+00C6), might be considered equivalent to any occurrence of the character's components in the correct sequence, such as "AE" (U+0041, U+0045), depending on the culture.

另請參閱

適用於