StringBuilder.Replace Method

Definition

Overloads

Examples

The following example demonstrates the Replace method.

using System;
using System.Text;

class Sample
{
    public static void Main()
    {
//                0----+----1----+----2----+----3----+----4---
//                01234567890123456789012345678901234567890123
    string str = "The quick br!wn d#g jumps #ver the lazy cat.";
    StringBuilder sb = new StringBuilder(str);

    Console.WriteLine();
    Console.WriteLine("StringBuilder.Replace method");
    Console.WriteLine();

    Console.WriteLine("Original value:");
    Show(sb);

    sb.Replace('#', '!', 15, 29);        // Some '#' -> '!'
    Show(sb);
    sb.Replace('!', 'o');                // All '!' -> 'o'
    Show(sb);
    sb.Replace("cat", "dog");            // All "cat" -> "dog"
    Show(sb);
    sb.Replace("dog", "fox", 15, 20);    // Some "dog" -> "fox"

    Console.WriteLine("Final value:");
    Show(sb);
    }

    public static void Show(StringBuilder sbs)
    {
    string rule1 = "0----+----1----+----2----+----3----+----4---";
    string rule2 = "01234567890123456789012345678901234567890123";

    Console.WriteLine(rule1);
    Console.WriteLine(rule2);
    Console.WriteLine("{0}", sbs.ToString());
    Console.WriteLine();
    }
}
/*
This example produces the following results:

StringBuilder.Replace method

Original value:
0----+----1----+----2----+----3----+----4---
01234567890123456789012345678901234567890123
The quick br!wn d#g jumps #ver the lazy cat.

0----+----1----+----2----+----3----+----4---
01234567890123456789012345678901234567890123
The quick br!wn d!g jumps !ver the lazy cat.

0----+----1----+----2----+----3----+----4---
01234567890123456789012345678901234567890123
The quick brown dog jumps over the lazy cat.

0----+----1----+----2----+----3----+----4---
01234567890123456789012345678901234567890123
The quick brown dog jumps over the lazy dog.

Final value:
0----+----1----+----2----+----3----+----4---
01234567890123456789012345678901234567890123
The quick brown fox jumps over the lazy dog.

*/

open System.Text

let show (sbs: StringBuilder) =
    let rule1 = "0----+----1----+----2----+----3----+----4---"
    let rule2 = "01234567890123456789012345678901234567890123"
    printfn $"{rule1}\n{rule2}\n{sbs}\n"

//         0----+----1----+----2----+----3----+----4---
//         01234567890123456789012345678901234567890123
let str = "The quick br!wn d#g jumps #ver the lazy cat."
let sb = StringBuilder str

printfn "StringBuilder.Replace method\n"

printfn "Original value:"
show sb

sb.Replace('#', '!', 15, 29) |> ignore // Some '#' -> '!'
show sb
sb.Replace('!', 'o') |> ignore // All '!' -> 'o'
show sb
sb.Replace("cat", "dog") |> ignore // All "cat" -> "dog"
show sb
sb.Replace("dog", "fox", 15, 20) |> ignore // Some "dog" -> "fox"

printfn "Final value:"
show sb

// This example produces the following results:
//       StringBuilder.Replace method
//
//       Original value:
//       0----+----1----+----2----+----3----+----4---
//       01234567890123456789012345678901234567890123
//       The quick br!wn d#g jumps #ver the lazy cat.
//
//       0----+----1----+----2----+----3----+----4---
//       01234567890123456789012345678901234567890123
//       The quick br!wn d!g jumps !ver the lazy cat.
//
//       0----+----1----+----2----+----3----+----4---
//       01234567890123456789012345678901234567890123
//       The quick brown dog jumps over the lazy cat.
//
//       0----+----1----+----2----+----3----+----4---
//       01234567890123456789012345678901234567890123
//       The quick brown dog jumps over the lazy dog.
//
//       Final value:
//       0----+----1----+----2----+----3----+----4---
//       01234567890123456789012345678901234567890123
//       The quick brown fox jumps over the lazy dog.

Imports System.Text

Class Sample
   Public Shared Sub Main()
      '                    0----+----1----+----2----+----3----+----4---
      '                    01234567890123456789012345678901234567890123
      Dim str As String = "The quick br!wn d#g jumps #ver the lazy cat."
      Dim sb As New StringBuilder(str)
      
      Console.WriteLine()
      Console.WriteLine("StringBuilder.Replace method")
      Console.WriteLine()
      
      Console.WriteLine("Original value:")
      Show(sb)
      
      sb.Replace("#"c, "!"c, 15, 29)   ' Some '#' -> '!'
      Show(sb)
      sb.Replace("!"c, "o"c)           ' All '!' -> 'o'
      Show(sb)
      sb.Replace("cat", "dog")         ' All "cat" -> "dog"
      Show(sb)
      sb.Replace("dog", "fox", 15, 20) ' Some "dog" -> "fox"
      Console.WriteLine("Final value:")
      Show(sb)
   End Sub
   
   Public Shared Sub Show(sbs As StringBuilder)
      Dim rule1 As String = "0----+----1----+----2----+----3----+----4---"
      Dim rule2 As String = "01234567890123456789012345678901234567890123"
      
      Console.WriteLine(rule1)
      Console.WriteLine(rule2)
      Console.WriteLine("{0}", sbs.ToString())
      Console.WriteLine()
   End Sub
End Class
'
'This example produces the following results:
'
'StringBuilder.Replace method
'
'Original value:
'0----+----1----+----2----+----3----+----4---
'01234567890123456789012345678901234567890123
'The quick br!wn d#g jumps #ver the lazy cat.
'
'0----+----1----+----2----+----3----+----4---
'01234567890123456789012345678901234567890123
'The quick br!wn d!g jumps !ver the lazy cat.
'
'0----+----1----+----2----+----3----+----4---
'01234567890123456789012345678901234567890123
'The quick brown dog jumps over the lazy cat.
'
'0----+----1----+----2----+----3----+----4---
'01234567890123456789012345678901234567890123
'The quick brown dog jumps over the lazy dog.
'
'Final value:
'0----+----1----+----2----+----3----+----4---
'01234567890123456789012345678901234567890123
'The quick brown fox jumps over the lazy dog.
'

public:
 System::Text::StringBuilder ^ Replace(char oldChar, char newChar);

public System.Text.StringBuilder Replace(char oldChar, char newChar);

member this.Replace : char * char -> System.Text.StringBuilder

Public Function Replace (oldChar As Char, newChar As Char) As StringBuilder

public:
 System::Text::StringBuilder ^ Replace(ReadOnlySpan<char> oldValue, ReadOnlySpan<char> newValue);

public System.Text.StringBuilder Replace(ReadOnlySpan<char> oldValue, ReadOnlySpan<char> newValue);

member this.Replace : ReadOnlySpan<char> * ReadOnlySpan<char> -> System.Text.StringBuilder

Public Function Replace (oldValue As ReadOnlySpan(Of Char), newValue As ReadOnlySpan(Of Char)) As StringBuilder

public:
 System::Text::StringBuilder ^ Replace(System::String ^ oldValue, System::String ^ newValue);

public System.Text.StringBuilder Replace(string oldValue, string newValue);

public System.Text.StringBuilder Replace(string oldValue, string? newValue);

member this.Replace : string * string -> System.Text.StringBuilder

Public Function Replace (oldValue As String, newValue As String) As StringBuilder

public:
 System::Text::StringBuilder ^ Replace(char oldChar, char newChar, int startIndex, int count);

public System.Text.StringBuilder Replace(char oldChar, char newChar, int startIndex, int count);

member this.Replace : char * char * int * int -> System.Text.StringBuilder

Public Function Replace (oldChar As Char, newChar As Char, startIndex As Integer, count As Integer) As StringBuilder

public:
 System::Text::StringBuilder ^ Replace(ReadOnlySpan<char> oldValue, ReadOnlySpan<char> newValue, int startIndex, int count);

public System.Text.StringBuilder Replace(ReadOnlySpan<char> oldValue, ReadOnlySpan<char> newValue, int startIndex, int count);

member this.Replace : ReadOnlySpan<char> * ReadOnlySpan<char> * int * int -> System.Text.StringBuilder

Public Function Replace (oldValue As ReadOnlySpan(Of Char), newValue As ReadOnlySpan(Of Char), startIndex As Integer, count As Integer) As StringBuilder

public:
 System::Text::StringBuilder ^ Replace(System::String ^ oldValue, System::String ^ newValue, int startIndex, int count);

public System.Text.StringBuilder Replace(string oldValue, string newValue, int startIndex, int count);

public System.Text.StringBuilder Replace(string oldValue, string? newValue, int startIndex, int count);

member this.Replace : string * string * int * int -> System.Text.StringBuilder

Public Function Replace (oldValue As String, newValue As String, startIndex As Integer, count As Integer) As StringBuilder