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StringBuilder.Replace Method (String, String)

Replaces all occurrences of a specified string in this instance with another specified string.

Namespace: System.Text
Assembly: mscorlib (in mscorlib.dll)

public StringBuilder Replace (
	string oldValue,
	string newValue
)
public StringBuilder Replace (
	String oldValue, 
	String newValue
)
public function Replace (
	oldValue : String, 
	newValue : String
) : StringBuilder
Not applicable.

Parameters

oldValue

The string to replace.

newValue

The string that replaces oldValue, or a null reference (Nothing in Visual Basic).

Return Value

A reference to this instance with all instances of oldValue replaced by newValue.

Exception typeCondition

ArgumentNullException

oldValue is a null reference (Nothing in Visual Basic).

ArgumentException

The length of oldvalue is zero.

ArgumentOutOfRangeException

Enlarging the value of this instance would exceed MaxCapacity.

The strings to replace are checked on an ordinal basis; that is, the replacement is not culture-aware. If newValue is a null reference (Nothing in Visual Basic), all occurrences of oldValue are removed. This method is case-sensitive.

The following code 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.

*/

// This example demonstrates StringBuilder.Replace()
import System.*;
import System.Text.*;

class Sample
{
    public static void main(String[] args)
    {
        //                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);
    } //main

    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();
    } //Show
} //Sample
/*
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.

*/

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0

XNA Framework

Supported in: 1.0

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