String.Replace 方法

定義

傳回新字串,其中目前字串中指定之 Unicode 字元或 String 的所有項目,全都會被取代成另一個指定的 Unicode 字元或 StringReturns a new string in which all occurrences of a specified Unicode character or String in the current string are replaced with another specified Unicode character or String.

多載

Replace(String, String, Boolean, CultureInfo)

傳回新字串,使用提供的文化特性並區分大小寫,將目前執行個體中出現的所有指定字串都替換成另一個指定字串。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.

Replace(Char, Char)

傳回新字串,其中這個執行個體中所有出現的指定 Unicode 字元都取代成其他指定的 Unicode 字元。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)

傳回新字串,其中目前執行個體中所有出現的指定字串,都取代成其他指定的字串。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)

傳回新字串,使用提供的比較類型,將目前執行個體中出現的所有指定字串都替換成另一個指定字串。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)

傳回新字串,使用提供的文化特性並區分大小寫,將目前執行個體中出現的所有指定字串都替換成另一個指定字串。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);
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

參數

oldValue
String

要被取代的字串。The string to be replaced.

newValue
String

用來取代所有出現之 oldValue 的字串。The string to replace all occurrences of oldValue.

ignoreCase
Boolean

true 會在比較時忽略大小寫;false 則不忽略大小寫。true to ignore casing when comparing; false otherwise.

culture
CultureInfo

比較時要使用的文化特性。The culture to use when comparing.

傳回

相當於目前字串的字串,只是 oldValue 的所有執行個體都會取代成 newValueA string that is equivalent to the current string except that all instances of oldValue are replaced with newValue. 如果在目前的執行個體中找不到 oldValue,則方法傳回未變更的目前執行個體。If oldValue is not found in the current instance, the method returns the current instance unchanged.

例外狀況

oldValuenulloldValue is null.

oldValue 為空字串 ("")。oldValue is the empty string ("").

備註

如果 null``newValue,則會移除所有出現的 oldValueIf newValue is null, all occurrences of oldValue are removed.

注意

這個方法不會修改目前實例的值。This method does not modify the value of the current instance. 相反地,它會傳回新的字串,其中所有出現的 oldValue 都會由 newValue所取代。Instead, it returns a new string in which all occurrences of oldValue are replaced by newValue.

這個方法會執行搜尋,以使用提供的 cultureignoreCase 區分大小寫來尋找 oldValueThis method performs a search to find oldValue using the provided culture and ignoreCase case sensitivity.

因為這個方法會傳回修改過的字串,所以您可以將後續 Replace 的呼叫連結在一起,以在原始字串上執行多個取代。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. 方法呼叫會從左至右執行。Method calls are executed from left to right. 下列範例提供說明。The following example provides an illustration.

String s = "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);

// 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'

Replace(Char, Char)

傳回新字串,其中這個執行個體中所有出現的指定 Unicode 字元都取代成其他指定的 Unicode 字元。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

參數

oldChar
Char

要被取代的 Unicode 字元。The Unicode character to be replaced.

newChar
Char

要用來取代所有出現之 oldChar 的 Unicode 字元。The Unicode character to replace all occurrences of oldChar.

傳回

相當於這個執行個體的字串,只是 oldChar 的所有執行個體都會取代成 newCharA string that is equivalent to this instance except that all instances of oldChar are replaced with newChar. 如果在目前的執行個體中找不到 oldChar,則方法傳回未變更的目前執行個體。If oldChar is not found in the current instance, the method returns the current instance unchanged.

範例

下列範例會以逗號分隔值清單,來建立一系列數位之間的空格。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: \"{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"
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"

備註

這個方法會執行序數(區分大小寫且不區分文化特性)搜尋,以尋找 oldCharThis method performs an ordinal (case-sensitive and culture-insensitive) search to find oldChar.

注意

這個方法不會修改目前實例的值。This method does not modify the value of the current instance. 相反地,它會傳回新的字串,其中所有出現的 oldChar 都會由 newChar所取代。Instead, it returns a new string in which all occurrences of oldChar are replaced by newChar.

因為這個方法會傳回修改過的字串,所以您可以將後續 Replace 的呼叫連結在一起,以在原始字串上執行多個取代。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. 方法呼叫會從左至右執行。Method calls are executed from left to right. 下列範例提供說明。The following example provides an illustration.

String s = new String('a', 3);
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);

// 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'

另請參閱

Replace(String, String)

傳回新字串,其中目前執行個體中所有出現的指定字串,都取代成其他指定的字串。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);
member this.Replace : string * string -> string
Public Function Replace (oldValue As String, newValue As String) As String

參數

oldValue
String

要被取代的字串。The string to be replaced.

newValue
String

用來取代所有出現之 oldValue 的字串。The string to replace all occurrences of oldValue.

傳回

相當於目前字串的字串,只是 oldValue 的所有執行個體都會取代成 newValueA string that is equivalent to the current string except that all instances of oldValue are replaced with newValue. 如果在目前的執行個體中找不到 oldValue,則方法傳回未變更的目前執行個體。If oldValue is not found in the current instance, the method returns the current instance unchanged.

例外狀況

oldValuenulloldValue is null.

oldValue 為空字串 ("")。oldValue is the empty string ("").

範例

下列範例會示範如何使用 Replace 方法來更正拼寫錯誤。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:{0}'{1}'{0}", Environment.NewLine, errString);

// Correct the spelling of "document".

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

Console.WriteLine("After correcting the string, the result is:{0}'{1}'",
        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'
'

備註

如果 null``newValue,則會移除所有出現的 oldValueIf newValue is null, all occurrences of oldValue are removed.

注意

這個方法不會修改目前實例的值。This method does not modify the value of the current instance. 相反地,它會傳回新的字串,其中所有出現的 oldValue 都會由 newValue所取代。Instead, it returns a new string in which all occurrences of oldValue are replaced by newValue.

這個方法會執行序數(區分大小寫且不區分文化特性)搜尋,以尋找 oldValueThis method performs an ordinal (case-sensitive and culture-insensitive) search to find oldValue.

因為這個方法會傳回修改過的字串,所以您可以將後續 Replace 的呼叫連結在一起,以在原始字串上執行多個取代。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. 方法呼叫會從左至右執行。Method calls are executed from left to right. 下列範例提供說明。The following example provides an illustration.

String s = "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);

// 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'

另請參閱

Replace(String, String, StringComparison)

傳回新字串,使用提供的比較類型,將目前執行個體中出現的所有指定字串都替換成另一個指定字串。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);
member this.Replace : string * string * StringComparison -> string
Public Function Replace (oldValue As String, newValue As String, comparisonType As StringComparison) As String

參數

oldValue
String

要被取代的字串。The string to be replaced.

newValue
String

用來取代所有出現之 oldValue 的字串。The string to replace all occurrences of oldValue.

comparisonType
StringComparison

列舉值之一,決定在此執行個體中搜尋 oldValue 的方式。One of the enumeration values that determines how oldValue is searched within this instance.

傳回

相當於目前字串的字串,只是 oldValue 的所有執行個體都會取代成 newValueA string that is equivalent to the current string except that all instances of oldValue are replaced with newValue. 如果在目前的執行個體中找不到 oldValue,則方法傳回未變更的目前執行個體。If oldValue is not found in the current instance, the method returns the current instance unchanged.

例外狀況

oldValuenulloldValue is null.

oldValue 為空字串 ("")。oldValue is the empty string ("").

備註

如果 null``newValue,則會移除所有出現的 oldValueIf newValue is null, all occurrences of oldValue are removed.

注意

這個方法不會修改目前實例的值。This method does not modify the value of the current instance. 相反地,它會傳回新的字串,其中所有出現的 oldValue 都會由 newValue所取代。Instead, it returns a new string in which all occurrences of oldValue are replaced by newValue.

這個方法會執行搜尋,以使用 comparisonType所描述的文化特性和區分大小寫來尋找 oldValueThis method performs a search to find oldValue using the culture and case sensitivity described by comparisonType.

因為這個方法會傳回修改過的字串,所以您可以將後續 Replace 的呼叫連結在一起,以在原始字串上執行多個取代。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. 方法呼叫會從左至右執行。Method calls are executed from left to right. 下列範例提供說明。The following example provides an illustration.

String s = "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);

// 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'

適用於