String.Replace Method
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Replace(Char, Char) |
Returns a new string in which all occurrences of a specified Unicode character in this instance are replaced with another specified Unicode character. |
Replace(String, String) |
Returns a new string in which all occurrences of a specified string in the current instance are replaced with another specified string. |
Replace(String, String, StringComparison) |
Returns a new string in which all occurrences of a specified string in the current instance are replaced with another specified string, using the provided comparison type. |
Replace(String, String, Boolean, CultureInfo) |
Returns a new string in which all occurrences of a specified string in the current instance are replaced with another specified string, using the provided culture and case sensitivity. |
- Source:
- String.Manipulation.cs
- Source:
- String.Manipulation.cs
- Source:
- String.Manipulation.cs
Returns a new string in which all occurrences of a specified Unicode character in this instance are replaced with another specified Unicode character.
public:
System::String ^ Replace(char oldChar, char newChar);
public string Replace (char oldChar, char newChar);
member this.Replace : char * char -> string
Public Function Replace (oldChar As Char, newChar As Char) As String
Parameters
- oldChar
- Char
The Unicode character to be replaced.
- newChar
- Char
The Unicode character to replace all occurrences of oldChar
.
Returns
A string that is equivalent to this instance except that all instances of oldChar
are replaced with newChar
. If oldChar
is not found in the current instance, the method returns the current instance unchanged.
Examples
The following example creates a comma separated value list by substituting commas for the blanks between a series of numbers.
using namespace System;
int main()
{
String^ str = "1 2 3 4 5 6 7 8 9";
Console::WriteLine( "Original string: \"{0}\"", str );
Console::WriteLine( "CSV string: \"{0}\"", str->Replace( ' ', ',' ) );
}
//
// This example produces the following output:
// Original string: "1 2 3 4 5 6 7 8 9"
// CSV string: "1,2,3,4,5,6,7,8,9"
//
string str = "1 2 3 4 5 6 7 8 9";
Console.WriteLine($"Original string: \"{str}\"");
Console.WriteLine($"CSV string: \"{str.Replace(' ', ',')}\"");
// This example produces the following output:
// Original string: "1 2 3 4 5 6 7 8 9"
// CSV string: "1,2,3,4,5,6,7,8,9"
let str = "1 2 3 4 5 6 7 8 9"
printfn $"Original string: \"{str}\""
printfn $"CSV string: \"{str.Replace(' ', ',')}\""
// This example produces the following output:
// Original string: "1 2 3 4 5 6 7 8 9"
// CSV string: "1,2,3,4,5,6,7,8,9"
Class stringReplace1
Public Shared Sub Main()
Dim str As [String] = "1 2 3 4 5 6 7 8 9"
Console.WriteLine("Original string: ""{0}""", str)
Console.WriteLine("CSV string: ""{0}""", str.Replace(" "c, ","c))
End Sub
End Class
' This example produces the following output:
' Original string: "1 2 3 4 5 6 7 8 9"
' CSV string: "1,2,3,4,5,6,7,8,9"
Remarks
This method performs an ordinal (case-sensitive and culture-insensitive) search to find oldChar
.
Note
This method does not modify the value of the current instance. Instead, it returns a new string in which all occurrences of oldChar
are replaced by newChar
.
Because this method returns the modified string, you can chain together successive calls to the Replace method to perform multiple replacements on the original string. Method calls are executed from left to right. The following example provides an illustration.
string s = new('a', 3);
Console.WriteLine($"The initial string: '{s}'");
s = s.Replace('a', 'b').Replace('b', 'c').Replace('c', 'd');
Console.WriteLine($"The final string: '{s}'");
// The example displays the following output:
// The initial string: 'aaa'
// The final string: 'ddd'
let s = new string('a', 3)
printfn $"The initial string: '{s}'"
let s2 = s.Replace('a', 'b').Replace('b', 'c').Replace('c', 'd')
printfn $"The final string: '{s2}'"
// The example displays the following output:
// The initial string: 'aaa'
// The final string: 'ddd'
Module Example
Public Sub Main()
Dim s As New String("a"c, 3)
Console.WriteLine("The initial string: '{0}'", s)
s = s.Replace("a"c, "b"c).Replace("b"c, "c"c).Replace("c"c, "d"c)
Console.WriteLine("The final string: '{0}'", s)
End Sub
End Module
' The example displays the following output:
' The initial string: 'aaa'
' The final string: 'ddd'
See also
- Char
- Concat(Object)
- Insert(Int32, String)
- Join(String, String[])
- Remove(Int32, Int32)
- Split(Char[])
- Substring(Int32)
- Trim(Char[])
Applies to
.NET 9 and other versions
Product | Versions |
---|---|
.NET | Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9 |
.NET Framework | 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
.NET Standard | 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1 |
UWP | 10.0 |
- Source:
- String.Manipulation.cs
- Source:
- String.Manipulation.cs
- Source:
- String.Manipulation.cs
Returns a new string in which all occurrences of a specified string in the current instance are replaced with another specified string.
public:
System::String ^ Replace(System::String ^ oldValue, System::String ^ newValue);
public string Replace (string oldValue, string newValue);
public string Replace (string oldValue, string? newValue);
member this.Replace : string * string -> string
Public Function Replace (oldValue As String, newValue As String) As String
Parameters
- oldValue
- String
The string to be replaced.
- newValue
- String
The string to replace all occurrences of oldValue
.
Returns
A string that is equivalent to the current string except that all instances of oldValue
are replaced with newValue
. If oldValue
is not found in the current instance, the method returns the current instance unchanged.
Exceptions
oldValue
is null
.
oldValue
is the empty string ("").
Examples
The following example demonstrates how you can use the Replace method to correct a spelling error.
using namespace System;
int main()
{
String^ errString = "This docment uses 3 other docments to docment the docmentation";
Console::WriteLine( "The original string is:\n'{0}'\n", errString );
// Correct the spelling of S"document".
String^ correctString = errString->Replace( "docment", "document" );
Console::WriteLine( "After correcting the string, the result is:\n'{0}'", correctString );
}
//
// 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'
//
string errString = "This docment uses 3 other docments to docment the docmentation";
Console.WriteLine($"The original string is:{Environment.NewLine}'{errString}'{Environment.NewLine}");
// Correct the spelling of "document".
string correctString = errString.Replace("docment", "document");
Console.WriteLine($"After correcting the string, the result is:{Environment.NewLine}'{correctString}'");
// 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'
//
open System
let errString = "This docment uses 3 other docments to docment the docmentation"
printfn $"The original string is:{Environment.NewLine}'{errString}'{Environment.NewLine}"
// Correct the spelling of "document".
let correctString = errString.Replace("docment", "document")
printfn $"After correcting the string, the result is:{Environment.NewLine}'{correctString}'"
// This code example produces the following output:
//
// The original string is:
// 'This docment uses 3 other docments to docment the docmentation'
//
// After correcting the string, the result is:
// 'This document uses 3 other documents to document the documentation'
//
Public Class ReplaceTest
Public Shared Sub Main()
Dim errString As String = "This docment uses 3 other docments to docment the docmentation"
Console.WriteLine("The original string is:{0}'{1}'{0}", Environment.NewLine, errString)
' Correct the spelling of "document".
Dim correctString As String = errString.Replace("docment", "document")
Console.WriteLine("After correcting the string, the result is:{0}'{1}'", Environment.NewLine, correctString)
End Sub
End Class
'
' This code example produces the following output:
'
' The original string is:
' 'This docment uses 3 other docments to docment the docmentation'
'
' After correcting the string, the result is:
' 'This document uses 3 other documents to document the documentation'
'
Remarks
If newValue
is null
, all occurrences of oldValue
are removed.
Note
This method does not modify the value of the current instance. Instead, it returns a new string in which all occurrences of oldValue
are replaced by newValue
.
This method performs an ordinal (case-sensitive and culture-insensitive) search to find oldValue
.
Because this method returns the modified string, you can chain together successive calls to the Replace method to perform multiple replacements on the original string. Method calls are executed from left to right. The following example provides an illustration.
string s = "aaa";
Console.WriteLine($"The initial string: '{s}'");
s = s.Replace("a", "b").Replace("b", "c").Replace("c", "d");
Console.WriteLine($"The final string: '{s}'");
// The example displays the following output:
// The initial string: 'aaa'
// The final string: 'ddd'
let s = "aaa"
printfn $"The initial string: '{s}'"
let s2 = s.Replace("a", "b").Replace("b", "c").Replace("c", "d")
printfn $"The final string: '{s2}'"
// The example displays the following output:
// The initial string: 'aaa'
// The final string: 'ddd'
Module Example
Public Sub Main()
Dim s As String = "aaa"
Console.WriteLine("The initial string: '{0}'", s)
s = s.Replace("a", "b").Replace("b", "c").Replace("c", "d")
Console.WriteLine("The final string: '{0}'", s)
End Sub
End Module
' The example displays the following output:
' The initial string: 'aaa'
' The final string: 'ddd'
See also
- Concat(Object)
- Insert(Int32, String)
- Join(String, String[])
- Remove(Int32, Int32)
- Split(Char[])
- Substring(Int32)
- Trim(Char[])
Applies to
.NET 9 and other versions
Product | Versions |
---|---|
.NET | Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9 |
.NET Framework | 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
.NET Standard | 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1 |
UWP | 10.0 |
- Source:
- String.Manipulation.cs
- Source:
- String.Manipulation.cs
- Source:
- String.Manipulation.cs
Returns a new string in which all occurrences of a specified string in the current instance are replaced with another specified string, using the provided comparison type.
public:
System::String ^ Replace(System::String ^ oldValue, System::String ^ newValue, StringComparison comparisonType);
public string Replace (string oldValue, string? newValue, StringComparison comparisonType);
public string Replace (string oldValue, string newValue, StringComparison comparisonType);
member this.Replace : string * string * StringComparison -> string
Public Function Replace (oldValue As String, newValue As String, comparisonType As StringComparison) As String
Parameters
- oldValue
- String
The string to be replaced.
- newValue
- String
The string to replace all occurrences of oldValue
.
- comparisonType
- StringComparison
One of the enumeration values that determines how oldValue
is searched within this instance.
Returns
A string that is equivalent to the current string except that all instances of oldValue
are replaced with newValue
. If oldValue
is not found in the current instance, the method returns the current instance unchanged.
Exceptions
oldValue
is null
.
oldValue
is the empty string ("").
Remarks
If newValue
is null
, all occurrences of oldValue
are removed.
Note
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 a search to find oldValue
using the culture and case sensitivity described by comparisonType
.
Because this method returns the modified string, you can chain together successive calls to the Replace method to perform multiple replacements on the original string. Method calls are executed from left to right. The following example provides an illustration.
string s = "aaa";
Console.WriteLine($"The initial string: '{s}'");
s = s.Replace("a", "b").Replace("b", "c").Replace("c", "d");
Console.WriteLine($"The final string: '{s}'");
// The example displays the following output:
// The initial string: 'aaa'
// The final string: 'ddd'
let s = "aaa"
printfn $"The initial string: '{s}'"
let s2 = s.Replace("a", "b").Replace("b", "c").Replace("c", "d")
printfn $"The final string: '{s2}'"
// The example displays the following output:
// The initial string: 'aaa'
// The final string: 'ddd'
Module Example
Public Sub Main()
Dim s As String = "aaa"
Console.WriteLine("The initial string: '{0}'", s)
s = s.Replace("a", "b").Replace("b", "c").Replace("c", "d")
Console.WriteLine("The final string: '{0}'", s)
End Sub
End Module
' The example displays the following output:
' The initial string: 'aaa'
' The final string: 'ddd'
Applies to
.NET 9 and other versions
Product | Versions |
---|---|
.NET | Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9 |
.NET Standard | 2.1 |
- Source:
- String.Manipulation.cs
- Source:
- String.Manipulation.cs
- Source:
- String.Manipulation.cs
Returns a new string in which all occurrences of a specified string in the current instance are replaced with another specified string, using the provided culture and case sensitivity.
public:
System::String ^ Replace(System::String ^ oldValue, System::String ^ newValue, bool ignoreCase, System::Globalization::CultureInfo ^ culture);
public string Replace (string oldValue, string? newValue, bool ignoreCase, System.Globalization.CultureInfo? culture);
public string Replace (string oldValue, string newValue, bool ignoreCase, System.Globalization.CultureInfo culture);
member this.Replace : string * string * bool * System.Globalization.CultureInfo -> string
Public Function Replace (oldValue As String, newValue As String, ignoreCase As Boolean, culture As CultureInfo) As String
Parameters
- oldValue
- String
The string to be replaced.
- newValue
- String
The string to replace all occurrences of oldValue
.
- ignoreCase
- Boolean
true
to ignore casing when comparing; false
otherwise.
- culture
- CultureInfo
The culture to use when comparing. If culture
is null
, the current culture is used.
Returns
A string that is equivalent to the current string except that all instances of oldValue
are replaced with newValue
. If oldValue
is not found in the current instance, the method returns the current instance unchanged.
Exceptions
oldValue
is null
.
oldValue
is the empty string ("").
Remarks
If newValue
is null
, all occurrences of oldValue
are removed.
Note
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 a search to find oldValue
using the provided culture
and ignoreCase
case sensitivity.
Because this method returns the modified string, you can chain together successive calls to the Replace method to perform multiple replacements on the original string. Method calls are executed from left to right. The following example provides an illustration.
string s = "aaa";
Console.WriteLine($"The initial string: '{s}'");
s = s.Replace("a", "b").Replace("b", "c").Replace("c", "d");
Console.WriteLine($"The final string: '{s}'");
// The example displays the following output:
// The initial string: 'aaa'
// The final string: 'ddd'
let s = "aaa"
printfn $"The initial string: '{s}'"
let s2 = s.Replace("a", "b").Replace("b", "c").Replace("c", "d")
printfn $"The final string: '{s2}'"
// The example displays the following output:
// The initial string: 'aaa'
// The final string: 'ddd'
Module Example
Public Sub Main()
Dim s As String = "aaa"
Console.WriteLine("The initial string: '{0}'", s)
s = s.Replace("a", "b").Replace("b", "c").Replace("c", "d")
Console.WriteLine("The final string: '{0}'", s)
End Sub
End Module
' The example displays the following output:
' The initial string: 'aaa'
' The final string: 'ddd'
Applies to
.NET 9 and other versions
Product | Versions |
---|---|
.NET | Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9 |
.NET Standard | 2.1 |
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