StringComparer.CurrentCulture プロパティ
定義
重要
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現在のカルチャの単語ベースの比較規則を使用して、大文字と小文字を区別して文字列を比較する StringComparer オブジェクトを取得します。
public:
static property StringComparer ^ CurrentCulture { StringComparer ^ get(); };public static StringComparer CurrentCulture { get; }member this.CurrentCulture : StringComparerPublic Shared ReadOnly Property CurrentCulture As StringComparerプロパティ値
新しい StringComparer オブジェクト。
例
次のコード例では、クラスのプロパティと Create メソッドを StringComparer 示します。 この例では、異なる StringComparer オブジェクトがラテン文字 I の 3 つのバージョンを並べ替える方法を示しています。
// This example demonstrates members of the
// System::StringComparer class.
using namespace System;
using namespace System::Collections;
using namespace System::Collections::Generic;
using namespace System::Globalization;
using namespace System::Threading;
void Display(List<String^>^ stringList, String^ title)
{
Char firstChar;
int codePoint;
Console::WriteLine(title);
for each (String^ s in stringList)
{
firstChar = s[0];
codePoint = Convert::ToInt32(firstChar);
Console::WriteLine("0x{0:x}", codePoint);
}
Console::WriteLine();
}
int main()
{
// Create a list of string.
List<String^>^ stringList = gcnew List<String^>();
// Get the tr-TR (Turkish-Turkey) culture.
CultureInfo^ turkishCulture = gcnew CultureInfo("tr-TR");
// Get the culture that is associated with the current thread.
CultureInfo^ currentCulture = Thread::CurrentThread->CurrentCulture;
// Get the standard StringComparers.
StringComparer^ invariant = StringComparer::InvariantCulture;
StringComparer^ invariantIgnoreCase =
StringComparer::InvariantCultureIgnoreCase;
StringComparer^ current = StringComparer::CurrentCulture;
StringComparer^ currentIgnoreCase =
StringComparer::CurrentCultureIgnoreCase;
StringComparer^ ordinal = StringComparer::Ordinal;
StringComparer^ ordinalIgnoreCase = StringComparer::OrdinalIgnoreCase;
// Create a StringComparer that uses the Turkish culture and ignores
// case.
StringComparer^ turkishIgnoreCase =
StringComparer::Create(turkishCulture, true);
// Define three strings consisting of different versions of the
// letter I. LATIN CAPITAL LETTER I (U+0049)
String^ capitalLetterI = "I";
// LATIN SMALL LETTER I (U+0069)
String^ smallLetterI = "i";
// LATIN SMALL LETTER DOTLESS I (U+0131)
String^ smallLetterDotlessI = L"\u0131";
// Add the three strings to the list.
stringList->Add(capitalLetterI);
stringList->Add(smallLetterI);
stringList->Add(smallLetterDotlessI);
// Display the original list order.
Display(stringList, "The original order of the list entries...");
// Sort the list using the invariant culture.
stringList->Sort(invariant);
Display(stringList, "Invariant culture...");
stringList->Sort(invariantIgnoreCase);
Display(stringList, "Invariant culture, ignore case...");
// Sort the list using the current culture.
Console::WriteLine("The current culture is \"{0}\".",
currentCulture->Name);
stringList->Sort(current);
Display(stringList, "Current culture...");
stringList->Sort(currentIgnoreCase);
Display(stringList, "Current culture, ignore case...");
// Sort the list using the ordinal value of the character code points.
stringList->Sort(ordinal);
Display(stringList, "Ordinal...");
stringList->Sort(ordinalIgnoreCase);
Display(stringList, "Ordinal, ignore case...");
// Sort the list using the Turkish culture, which treats LATIN SMALL
// LETTER DOTLESS I differently than LATIN SMALL LETTER I.
stringList->Sort(turkishIgnoreCase);
Display(stringList, "Turkish culture, ignore case...");
}
/*
This code example produces the following results:
The original order of the list entries...
0x49
0x69
0x131
Invariant culture...
0x69
0x49
0x131
Invariant culture, ignore case...
0x49
0x69
0x131
The current culture is "en-US".
Current culture...
0x69
0x49
0x131
Current culture, ignore case...
0x49
0x69
0x131
Ordinal...
0x49
0x69
0x131
Ordinal, ignore case...
0x69
0x49
0x131
Turkish culture, ignore case...
0x131
0x49
0x69
*/
// This example demonstrates members of the
// System.StringComparer class.
using System;
using System.Collections;
using System.Collections.Generic;
using System.Globalization;
using System.Threading;
class Sample
{
public static void Main()
{
// Create a list of string.
List<string> list = new List<string>();
// Get the tr-TR (Turkish-Turkey) culture.
CultureInfo turkish = new CultureInfo("tr-TR");
// Get the culture that is associated with the current thread.
CultureInfo thisCulture = Thread.CurrentThread.CurrentCulture;
// Get the standard StringComparers.
StringComparer invCmp = StringComparer.InvariantCulture;
StringComparer invICCmp = StringComparer.InvariantCultureIgnoreCase;
StringComparer currCmp = StringComparer.CurrentCulture;
StringComparer currICCmp = StringComparer.CurrentCultureIgnoreCase;
StringComparer ordCmp = StringComparer.Ordinal;
StringComparer ordICCmp = StringComparer.OrdinalIgnoreCase;
// Create a StringComparer that uses the Turkish culture and ignores case.
StringComparer turkICComp = StringComparer.Create(turkish, true);
// Define three strings consisting of different versions of the letter I.
// LATIN CAPITAL LETTER I (U+0049)
string capitalLetterI = "I";
// LATIN SMALL LETTER I (U+0069)
string smallLetterI = "i";
// LATIN SMALL LETTER DOTLESS I (U+0131)
string smallLetterDotlessI = "\u0131";
// Add the three strings to the list.
list.Add(capitalLetterI);
list.Add(smallLetterI);
list.Add(smallLetterDotlessI);
// Display the original list order.
Display(list, "The original order of the list entries...");
// Sort the list using the invariant culture.
list.Sort(invCmp);
Display(list, "Invariant culture...");
list.Sort(invICCmp);
Display(list, "Invariant culture, ignore case...");
// Sort the list using the current culture.
Console.WriteLine("The current culture is \"{0}\".", thisCulture.Name);
list.Sort(currCmp);
Display(list, "Current culture...");
list.Sort(currICCmp);
Display(list, "Current culture, ignore case...");
// Sort the list using the ordinal value of the character code points.
list.Sort(ordCmp);
Display(list, "Ordinal...");
list.Sort(ordICCmp);
Display(list, "Ordinal, ignore case...");
// Sort the list using the Turkish culture, which treats LATIN SMALL LETTER
// DOTLESS I differently than LATIN SMALL LETTER I.
list.Sort(turkICComp);
Display(list, "Turkish culture, ignore case...");
}
public static void Display(List<string> lst, string title)
{
Char c;
int codePoint;
Console.WriteLine(title);
foreach (string s in lst)
{
c = s[0];
codePoint = Convert.ToInt32(c);
Console.WriteLine("0x{0:x}", codePoint);
}
Console.WriteLine();
}
}
/*
This code example produces the following results:
The original order of the list entries...
0x49
0x69
0x131
Invariant culture...
0x69
0x49
0x131
Invariant culture, ignore case...
0x49
0x69
0x131
The current culture is "en-US".
Current culture...
0x69
0x49
0x131
Current culture, ignore case...
0x49
0x69
0x131
Ordinal...
0x49
0x69
0x131
Ordinal, ignore case...
0x69
0x49
0x131
Turkish culture, ignore case...
0x131
0x49
0x69
*/
// This example demonstrates members of the
// System.StringComparer class.
open System
open System.Globalization
open System.Threading
let display (lst: ResizeArray<string>) title =
printfn $"%s{title}"
for s in lst do
let c = s[0]
let codePoint = Convert.ToInt32 c
printfn $"0x{codePoint:x}"
printfn ""
// Create a list of string.
let list = ResizeArray()
// Get the tr-TR (Turkish-Turkey) culture.
let turkish = CultureInfo "tr-TR"
// Get the culture that is associated with the current thread.
let thisCulture = Thread.CurrentThread.CurrentCulture
// Get the standard StringComparers.
let invCmp = StringComparer.InvariantCulture
let invICCmp = StringComparer.InvariantCultureIgnoreCase
let currCmp = StringComparer.CurrentCulture
let currICCmp = StringComparer.CurrentCultureIgnoreCase
let ordCmp = StringComparer.Ordinal
let ordICCmp = StringComparer.OrdinalIgnoreCase
// Create a StringComparer that uses the Turkish culture and ignores case.
let turkICComp = StringComparer.Create(turkish, true)
// Define three strings consisting of different versions of the letter I.
// LATIN CAPITAL LETTER I (U+0049)
let capitalLetterI = "I"
// LATIN SMALL LETTER I (U+0069)
let smallLetterI = "i"
// LATIN SMALL LETTER DOTLESS I (U+0131)
let smallLetterDotlessI = "\u0131"
// Add the three strings to the list.
list.Add capitalLetterI
list.Add smallLetterI
list.Add smallLetterDotlessI
// Display the original list order.
display list "The original order of the list entries..."
// Sort the list using the invariant culture.
list.Sort invCmp
display list "Invariant culture..."
list.Sort invICCmp
display list "Invariant culture, ignore case..."
// Sort the list using the current culture.
printfn $"The current culture is \"{thisCulture.Name}\"."
list.Sort currCmp
display list "Current culture..."
list.Sort currICCmp
display list "Current culture, ignore case..."
// Sort the list using the ordinal value of the character code points.
list.Sort ordCmp
display list "Ordinal..."
list.Sort ordICCmp
display list "Ordinal, ignore case..."
// Sort the list using the Turkish culture, which treats LATIN SMALL LETTER
// DOTLESS I differently than LATIN SMALL LETTER I.
list.Sort turkICComp
display list "Turkish culture, ignore case..."
(*
This code example produces the following results:
The original order of the list entries...
0x49
0x69
0x131
Invariant culture...
0x69
0x49
0x131
Invariant culture, ignore case...
0x49
0x69
0x131
The current culture is "en-US".
Current culture...
0x69
0x49
0x131
Current culture, ignore case...
0x49
0x69
0x131
Ordinal...
0x49
0x69
0x131
Ordinal, ignore case...
0x69
0x49
0x131
Turkish culture, ignore case...
0x131
0x49
0x69
*)
' This code example demonstrates members of the System.StringComparer class.
Imports System.Collections
Imports System.Collections.Generic
Imports System.Globalization
Imports System.Threading
Class Sample
Public Shared Sub Main()
' Create a list of string.
Dim list As New List(Of String)
' Get the tr-TR (Turkish-Turkey) culture.
Dim turkish As New CultureInfo("tr-TR")
' Get the culture that is associated with the current thread.
Dim thisCulture As CultureInfo = Thread.CurrentThread.CurrentCulture
' Get the standard StringComparers.
Dim invCmp As StringComparer = StringComparer.InvariantCulture
Dim invICCmp As StringComparer = StringComparer.InvariantCultureIgnoreCase
Dim currCmp As StringComparer = StringComparer.CurrentCulture
Dim currICCmp As StringComparer = StringComparer.CurrentCultureIgnoreCase
Dim ordCmp As StringComparer = StringComparer.Ordinal
Dim ordICCmp As StringComparer = StringComparer.OrdinalIgnoreCase
' Create a StringComparer that uses the Turkish culture and ignores case.
Dim turkICComp As StringComparer = StringComparer.Create(turkish, True)
' Define three strings consisting of different versions of the letter I.
' LATIN CAPITAL LETTER I (U+0049)
Dim capitalLetterI As String = "I"
' LATIN SMALL LETTER I (U+0069)
Dim smallLetterI As String = "i"
' LATIN SMALL LETTER DOTLESS I (U+0131)
Dim smallLetterDotlessI As String = "ı"
' Add the three strings to the list.
list.Add(capitalLetterI)
list.Add(smallLetterI)
list.Add(smallLetterDotlessI)
' Display the original list order.
Display(list, "The original order of the list entries...")
' Sort the list using the invariant culture.
list.Sort(invCmp)
Display(list, "Invariant culture...")
list.Sort(invICCmp)
Display(list, "Invariant culture, ignore case...")
' Sort the list using the current culture.
Console.WriteLine("The current culture is ""{0}"".", thisCulture.Name)
list.Sort(currCmp)
Display(list, "Current culture...")
list.Sort(currICCmp)
Display(list, "Current culture, ignore case...")
' Sort the list using the ordinal value of the character code points.
list.Sort(ordCmp)
Display(list, "Ordinal...")
list.Sort(ordICCmp)
Display(list, "Ordinal, ignore case...")
' Sort the list using the Turkish culture, which treats LATIN SMALL LETTER
' DOTLESS I differently than LATIN SMALL LETTER I.
list.Sort(turkICComp)
Display(list, "Turkish culture, ignore case...")
End Sub
Public Shared Sub Display(ByVal lst As List(Of String), ByVal title As String)
Dim c As Char
Dim s As String
Dim codePoint As Integer
Console.WriteLine(title)
For Each s In lst
c = s(0)
codePoint = Convert.ToInt32(c)
Console.WriteLine("0x{0:x}", codePoint)
Next s
Console.WriteLine()
End Sub
End Class
'This code example produces the following results:
'
'The original order of the list entries...
'0x49
'0x69
'0x131
'
'Invariant culture...
'0x69
'0x49
'0x131
'
'Invariant culture, ignore case...
'0x49
'0x69
'0x131
'
'The current culture is "en-US".
'Current culture...
'0x69
'0x49
'0x131
'
'Current culture, ignore case...
'0x49
'0x69
'0x131
'
'Ordinal...
'0x49
'0x69
'0x131
'
'Ordinal, ignore case...
'0x69
'0x49
'0x131
'
'Turkish culture, ignore case...
'0x131
'0x49
'0x69
'
注釈
プロパティによってCurrentCulture返される値はStringComparer、文字列が言語的に関連する場合に使用できます。 たとえば、文字列がユーザーに表示される場合、または文字列がユーザー操作の結果である場合は、カルチャに依存する文字列比較を使用して文字列データを並べ替える必要があります。
現在のカルチャは、現在の CultureInfo スレッドに関連付けられているオブジェクトです。
このプロパティは CurrentCulture 、実際には、クラスから派生した匿名クラスのインスタンスを StringComparer 返します。
プロパティ get アクセサーをCurrentCulture呼び出すたびに、次のコードに示すように、新しいStringComparerオブジェクトが返されます。
private void CompareCurrentCultureStringComparer()
{
StringComparer stringComparer1 = StringComparer.CurrentCulture;
StringComparer stringComparer2 = StringComparer.CurrentCulture;
// Displays false
Console.WriteLine(StringComparer.ReferenceEquals(stringComparer1,
stringComparer2));
}
let compareCurrentCultureStringComparer () =
let stringComparer1 = StringComparer.CurrentCulture
let stringComparer2 = StringComparer.CurrentCulture
// Displays false
printfn $"{StringComparer.ReferenceEquals(stringComparer1, stringComparer2)}"
Private Sub CompareCurrentCultureStringComparers()
Dim stringComparer1 As StringComparer = StringComparer.CurrentCulture
Dim stringComparer2 As StringComparer = StringComparer.CurrentCulture
' Displays False
Console.WriteLine(StringComparer.ReferenceEquals(stringComparer1, _
stringComparer2))
End Sub
パフォーマンスを向上させるために、プロパティの値を StringComparer 複数回取得するのではなく、ローカル変数にオブジェクトを CurrentCulture 格納できます。