ToUpper Method ()
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String.ToUpper Method ()

Returns a copy of this String converted to uppercase, using the casing rules of the current culture.

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

Public Function ToUpper As String
Dim instance As String
Dim returnValue As String

returnValue = instance.ToUpper
public String ToUpper ()
public function ToUpper () : String
Not applicable.

Return Value

A String in uppercase.

This method takes into account the current culture. For more information, see the CultureInfo topic.

Security Considerations

If you need the lowercase or uppercase version of an operating system identifier, such as a file name, named pipe, or registry key, use the ToLowerInvariant or ToUpperInvariant methods.

The following code example demonstrates how you can make a String comparison case-insensitive using the ToUpper method.

No code example is currently available or this language may not be supported.

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0

XNA Framework

Supported in: 1.0

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