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TextInfo.ToUpper Method (Char)

Converts the specified character to uppercase.

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

'Declaration
Public Overridable Function ToUpper ( _
	c As Char _
) As Char
'Usage
Dim instance As TextInfo 
Dim c As Char 
Dim returnValue As Char 

returnValue = instance.ToUpper(c)

Parameters

c
Type: System.Char

The character to convert to uppercase.

Return Value

Type: System.Char
The specified character converted to uppercase.

Casing semantics depend on the culture in use. For the invariant culture, the casing semantics are not culture-sensitive. For a specific culture, the casing semantics are sensitive to that culture.

If a security decision depends on a string comparison or a case-change operation, the application should use the InvariantCulture to ensure that the behavior is consistent regardless of the culture settings of the system. However, the invariant culture must be used only by processes that require culture-independent results, such as system services. Otherwise, it produces results that might be linguistically incorrect or culturally inappropriate.

For more information on cultures, see CultureInfo.

Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows CE Platform Note: The .NET Compact Framework uses native Windows CE functions to change characters to upper or lower case. Windows CE does not provide changing the case of surrogate pairs, so this capability is not supported in the .NET Compact Framework.

The following code example changes the casing of a string based on the English (United States) culture, with the culture name en-US.

Imports System
Imports System.Globalization

Public Class SamplesTextInfo

   Public Shared Sub Main()

      ' Defines the string with mixed casing. 
      Dim myString As String = "wAr aNd pEaCe" 

      ' Creates a TextInfo based on the "en-US" culture. 
      Dim myTI As TextInfo = New CultureInfo("en-US", False).TextInfo

      ' Changes a string to lowercase.
      Console.WriteLine("""{0}"" to lowercase: {1}", myString, myTI.ToLower(myString))

      ' Changes a string to uppercase.
      Console.WriteLine("""{0}"" to uppercase: {1}", myString, myTI.ToUpper(myString))

      ' Changes a string to titlecase.
      Console.WriteLine("""{0}"" to titlecase: {1}", myString, myTI.ToTitleCase(myString))

   End Sub 'Main 

End Class 'SamplesTextInfo


'This code produces the following output. 

'"wAr aNd pEaCe" to lowercase: war and peace 
'"wAr aNd pEaCe" to uppercase: WAR AND PEACE 
'"wAr aNd pEaCe" to titlecase: War And Peace

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

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

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0

XNA Framework

Supported in: 3.0, 2.0, 1.0

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