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Strings.StrComp Method

Returns -1, 0, or 1, based on the result of a string comparison.

Namespace:  Microsoft.VisualBasic
Assembly:  Microsoft.VisualBasic (in Microsoft.VisualBasic.dll)

'Declaration
Public Shared Function StrComp ( _
	String1 As String, _
	String2 As String, _
	Compare As CompareMethod _
) As Integer

Parameters

String1
Type: System.String
Required. Any valid String expression.
String2
Type: System.String
Required. Any valid String expression.
Compare
Type: Microsoft.VisualBasic.CompareMethod
Optional. Specifies the type of string comparison. If Compare is omitted, the Option Compare setting determines the type of comparison.

Return Value

Type: System.Int32
The StrComp function has the following return values.

If

StrComp returns

String1 sorts ahead of String2

-1

String1 is equal to String2

0

String1 sorts after String2

1

ExceptionCondition
ArgumentException

Compare value is not valid.

The strings are compared by alphanumeric sort values beginning with the first character. For further information on binary comparisons, textual comparisons, and sort order, see Option Compare Statement.

The Compare argument settings are:

Constant

Description

Binary

Performs a binary comparison, based on a sort order derived from the internal binary representations of the characters.

Text

Performs a text comparison, based on a case-insensitive text sort order determined by your system's LocaleID value.

This example uses the StrComp function to return the results of a string comparison.


' Defines variables.
Dim TestStr1 As String = "ABCD"
Dim TestStr2 As String = "abcd"
Dim TestComp As Integer
' The two strings sort equally. Returns 0.
TestComp = StrComp(TestStr1, TestStr2, CompareMethod.Text)
' TestStr1 sorts before TestStr2. Returns -1.
TestComp = StrComp(TestStr1, TestStr2, CompareMethod.Binary)
' TestStr2 sorts after TestStr1. Returns 1.
TestComp = StrComp(TestStr2, TestStr1, CompareMethod.Binary)


.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.

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