String.ToUpper Method (CultureInfo)

Returns a copy of this string converted to uppercase, using the casing rules of the specified culture.

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

'Declaration
Public Function ToUpper ( _
	culture As CultureInfo _
) As String

Parameters

culture
Type: System.Globalization.CultureInfo
An object that supplies culture-specific casing rules.

Return Value

Type: System.String
The uppercase equivalent of the current string.

ExceptionCondition
ArgumentNullException

culture is Nothing.

The casing rules of the culture specified by the culture parameter determine the way the case of a string is changed.

NoteNote

   This method does not modify the value of the current instance. Instead, it returns a new string in which all characters in the current instance are converted to uppercase.

The following example converts a string of lowercase characters to two strings of uppercase characters using the English-United States and Turkish-Turkey cultures, then compares the uppercase strings. The uppercase strings are identical except that for each occurrence of the Unicode LATIN CAPITAL LETTER I in one string, the other string contains LATIN CAPITAL LETTER I WITH DOT ABOVE.


Imports System.Globalization

Public Module Example
   Public Sub Main()
      Dim str1 As String = "indigo"
      Dim str2, str3 As String

      ' str2 is an uppercase copy of str1, using English-United States culture.
      str2 = str1.ToUpper(New CultureInfo("en-US", False))

      ' str3 is an uppercase copy of str1, using Turkish-Turkey culture.
      str3 = str1.ToUpper(New CultureInfo("tr-TR", False))

      ' Compare the code points and compare the uppercase strings.
      ShowCodePoints("str1", str1)
      ShowCodePoints("str2", str2)
      ShowCodePoints("str3", str3)
      Console.WriteLine("str2 is {0} to str3.", _
                        IIf(String.CompareOrdinal(str2, str3) = 0, "equal", "not equal"))
   End Sub

   Public Sub ShowCodePoints(varName As String, s As String)
      Console.Write("{0} = {1}: ", varName, s)
      For Each c In s
         Console.Write("{0:X4} ", AscW(c))
      Next
      Console.WriteLine() 
   End Sub 
End Module
' The example displays the following output:
'       str1 = indigo: 0069 006E 0064 0069 0067 006F
'       str2 = INDIGO: 0049 004E 0044 0049 0047 004F
'       str3 = İNDİGO: 0130 004E 0044 0130 0047 004F
'       str2 is not equal to str3.


.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
Was this page helpful?
(1500 characters remaining)
Thank you for your feedback

Community Additions

ADD
Show:
© 2014 Microsoft