Char.IsUpper Method (String, Int32)

[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]

Indicates whether the character at the specified position in a specified string is categorized as an uppercase letter.

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

Syntax

Public Shared Function IsUpper ( _
    s As String, _
    index As Integer _
) As Boolean
public static bool IsUpper(
    string s,
    int index
)

Parameters

Return Value

Type: System..::.Boolean
true if the character at position index in s is an uppercase letter; otherwise, false.

Exceptions

Exception Condition
ArgumentNullException

s is nullNothingnullptra null reference (Nothing in Visual Basic).

ArgumentOutOfRangeException

index is less than zero or greater than the last position in s.

Remarks

Character positions in a string are indexed starting from zero.

Valid uppercase letters are members of the following category in UnicodeCategory: UppercaseLetter.

Version Information

Windows Phone OS

Supported in: 8.1, 8.0, 7.1, 7.0

Platforms

Windows Phone

See Also

Reference

Char Structure

IsUpper Overload

System Namespace

Boolean

String