String.Replace Method (String, String)

May 11, 2014

Returns a new string in which all occurrences of a specified string in the current string are replaced with another specified string.

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

public string Replace(
	string oldValue,
	string newValue
)

Parameters

oldValue
Type: System.String
A string to be replaced.
newValue
Type: System.String
A string to replace all occurrences of oldValue.

Return Value

Type: System.String
A string that is equivalent to the current string except that all instances of oldValue are replaced with newValue.

ExceptionCondition
ArgumentNullException

oldValue is null.

ArgumentException

oldValue is the empty string ("").

If newValue is null, all occurrences of oldValue are removed.

NoteNote:

This method does not modify the value of the current instance. Instead, it returns a new string in which all occurrences of oldValue are replaced by newValue.

This method performs an ordinal (case-sensitive and culture-insensitive) search to find oldValue.

The following example demonstrates how you can use the Replace method to correct a spelling error.


using System;

public class Example
{
   public static void Demo(System.Windows.Controls.TextBlock outputBlock)
   {

      string errString = "This docment uses 3 other docments to docment the docmentation";

      outputBlock.Text += String.Format("The original string is:{0}'{1}'{0}", "\n", errString) + "\n";

      // Correct the spelling of "document".

      string correctString = errString.Replace("docment", "document");

      outputBlock.Text += String.Format("After correcting the string, the result is:{0}'{1}'",
              "\n", correctString) + "\n";
   }
}
//
// This code example produces the following output:
//
// The original string is:
// 'This docment uses 3 other docments to docment the docmentation'
//
// After correcting the string, the result is:
// 'This document uses 3 other documents to document the documentation'
//


Windows Phone OS

Supported in: 8.1, 8.0, 7.1, 7.0

Windows Phone

Show:
© 2014 Microsoft