StringComparer::InvariantCulture Property
Gets a StringComparer object that performs a case-sensitive string comparison using the word comparison rules of the invariant culture.
Assembly: mscorlib (in mscorlib.dll)
TheStringComparer returned by the InvariantCulture property compares strings in a linguistically relevant manner, but it is not suitable for display in any particular culture. Its major application is to order strings in a way that will be identical across cultures.
The invariant culture is the CultureInfo object returned by the InvariantCulture property.
The InvariantCulture property actually returns an instance of an anonymous class derived from the StringComparer class.
The following code example demonstrates the properties and the Create method of the StringComparer class. The example illustrates how different StringComparer objects sort three versions of the Latin letter I.
// 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 */
Available since 2.0
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0