String.LastIndexOf Method
Reports the index position of the last occurrence of a specified Unicode character or String within this instance.
Overload List
Reports the index position of the last occurrence of a specified Unicode character within this instance.
Supported by the .NET Compact Framework.
[Visual Basic] Overloads Public Function LastIndexOf(Char) As Integer
[C#] public int LastIndexOf(char);
[C++] public: int LastIndexOf(__wchar_t);
[JScript] public function LastIndexOf(Char) : int;
Reports the index position of the last occurrence of a specified String within this instance.
Supported by the .NET Compact Framework.
[Visual Basic] Overloads Public Function LastIndexOf(String) As Integer
[C#] public int LastIndexOf(string);
[C++] public: int LastIndexOf(String*);
[JScript] public function LastIndexOf(String) : int;
Reports the index position of the last occurrence of a specified Unicode character within this instance. The search starts at a specified character position.
Supported by the .NET Compact Framework.
[Visual Basic] Overloads Public Function LastIndexOf(Char, Integer) As Integer
[C#] public int LastIndexOf(char, int);
[C++] public: int LastIndexOf(__wchar_t, int);
[JScript] public function LastIndexOf(Char, int) : int;
Reports the index position of the last occurrence of a specified String within this instance. The search starts at a specified character position.
Supported by the .NET Compact Framework.
[Visual Basic] Overloads Public Function LastIndexOf(String, Integer) As Integer
[C#] public int LastIndexOf(string, int);
[C++] public: int LastIndexOf(String*, int);
[JScript] public function LastIndexOf(String, int) : int;
Reports the index position of the last occurrence of the specified Unicode character in a substring within this instance. The search starts at a specified character position and examines a specified number of character positions.
Supported by the .NET Compact Framework.
[Visual Basic] Overloads Public Function LastIndexOf(Char, Integer, Integer) As Integer
[C#] public int LastIndexOf(char, int, int);
[C++] public: int LastIndexOf(__wchar_t, int, int);
[JScript] public function LastIndexOf(Char, int, int) : int;
Reports the 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.
Supported by the .NET Compact Framework.
[Visual Basic] Overloads Public Function LastIndexOf(String, Integer, Integer) As Integer
[C#] public int LastIndexOf(string, int, int);
[C++] public: int LastIndexOf(String*, int, int);
[JScript] public function LastIndexOf(String, int, int) : int;
Example
[Visual Basic, C#, C++] Note This example shows how to use one of the overloaded versions of LastIndexOf. For other examples that might be available, see the individual overload topics.
[Visual Basic] ' Sample for String.LastIndexOf(String, Int32, Int32) Imports System _ 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 [end] As Integer start = str.Length - 1 [end] = start / 2 - 1 Console.WriteLine("All occurrences of 'he' from position {0} to {1}.", start, [end]) Console.WriteLine("{1}{0}{2}{0}{3}{0}", Environment.NewLine, br1, br2, str) Console.Write("The string 'he' occurs at position(s): ") count = 0 at = 0 While start > - 1 And at > - 1 count = start - [end] 'Count must be within the substring. at = str.LastIndexOf("he", start, count) If at > - 1 Then Console.Write("{0} ", at) start = at - 1 End If End While Console.Write("{0}{0}{0}", Environment.NewLine) End Sub 'Main End Class 'Sample ' 'This example produces the following results: 'All occurrences of 'he' from position 66 to 32. '0----+----1----+----2----+----3----+----4----+----5----+----6----+- '0123456789012345678901234567890123456789012345678901234567890123456 'Now is the time for all good men to come to the aid of their party. ' 'The string 'he' occurs at position(s): 56 45 ' ' [C#] // Sample for String.LastIndexOf(String, 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; int end; start = str.Length-1; end = start/2 - 1; Console.WriteLine("All occurrences of 'he' from position {0} to {1}.", start, end); Console.WriteLine("{1}{0}{2}{0}{3}{0}", Environment.NewLine, br1, br2, str); Console.Write("The string 'he' occurs at position(s): "); count = 0; at = 0; while((start > -1) && (at > -1)) { count = start - end; //Count must be within the substring. at = str.LastIndexOf("he", start, count); if (at > -1) { Console.Write("{0} ", at); start = at - 1; } } Console.Write("{0}{0}{0}", Environment.NewLine); } } /* This example produces the following results: All occurrences of 'he' from position 66 to 32. 0----+----1----+----2----+----3----+----4----+----5----+----6----+- 0123456789012345678901234567890123456789012345678901234567890123456 Now is the time for all good men to come to the aid of their party. The string 'he' occurs at position(s): 56 45 */ [C++] // Sample for String::LastIndexOf(String, Int32, Int32) #using <mscorlib.dll> using namespace System; int main() { String* br1 = S"0----+----1----+----2----+----3----+----4----+----5----+----6----+-"; String* br2 = S"0123456789012345678901234567890123456789012345678901234567890123456"; String* str = S"Now is the time for all good men to come to the aid of their party."; int start; int at; int count; int end; start = str->Length-1; end = start/2 - 1; Console::WriteLine(S"All occurrences of 'he' from position {0} to {1}.", __box(start), __box(end)); Console::WriteLine(S"{1}{0}{2}{0}{3}{0}", Environment::NewLine, br1, br2, str); Console::Write(S"The string 'he' occurs at position(s): "); count = 0; at = 0; while((start > -1) && (at > -1)) { count = start - end; //Count must be within the substring. at = str->LastIndexOf(S"he", start, count); if (at > -1) { Console::Write(S"{0} ", __box(at)); start = at - 1; } } Console::Write(S"{0} {0} {0}", Environment::NewLine); } /* This example produces the following results: All occurrences of 'he' from position 66 to 32. 0----+----1----+----2----+----3----+----4----+----5----+----6----+- 0123456789012345678901234567890123456789012345678901234567890123456 Now is the time for all good men to come to the aid of their party. The string 'he' occurs at position(s): 56 45 */
[JScript] No example is available for JScript. To view a Visual Basic, C#, or C++ example, click the Language Filter button
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