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Strings.Filter Method (Object[], String, Boolean, CompareMethod)

Returns a zero-based array containing a subset of a String array based on specified filter criteria.

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

public static string[] Filter(
	Object[] Source,
	string Match,
	bool Include,
	CompareMethod Compare
)

Parameters

Source
Type: System.Object[]

Required. One-dimensional array of strings to be searched.

Match
Type: System.String

Required. String to search for.

Include
Type: System.Boolean

Optional. Boolean value indicating whether to return substrings that include or exclude Match. If Include is True, the Filter function returns the subset of the array that contains Match as a substring. If Include is False, the Filter function returns the subset of the array that does not contain Match as a substring.

Compare
Type: Microsoft.VisualBasic.CompareMethod

Optional. Numeric value indicating the kind of string comparison to use. See "Settings" for values.

Return Value

Type: System.String[]
Returns a zero-based array containing a subset of a String array based on specified filter criteria.

For more detailed information, see the Visual Basic topic Filter Function (Visual Basic).

If no matches of Match are found within Source, the Filter function returns an empty array. An error occurs if Source is set to Nothing or is not a one-dimensional array.

The array returned by the Filter function contains only enough elements to contain the number of matched items.

The Compare argument can have the following values.

Constant

Description

CompareMethod.Binary

Performs a binary comparison

CompareMethod.Text

Performs a textual comparison

This example demonstrates the use of the Filter function.

Dim TestStrings(2) As String
TestStrings(0) = "This"
TestStrings(1) = "Is"
TestStrings(2) = "It" 
Dim subStrings() As String 
' Returns ["This", "Is"].
subStrings = Filter(TestStrings, "is", True, CompareMethod.Text)
' Returns ["This"].
subStrings = Filter(TestStrings, "is", True, CompareMethod.Binary)
' Returns ["Is", "It"].
subStrings = Filter(TestStrings, "is", False, CompareMethod.Binary)

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

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

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