Export (0) Print
Expand All

VBFixedArrayAttribute Class

Indicates that an array in a structure or non-local variable should be treated as a fixed-length array.

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

[AttributeUsageAttribute(AttributeTargets.Field, Inherited=false, AllowMultiple=false)] 
public sealed class VBFixedArrayAttribute : Attribute
/** @attribute AttributeUsageAttribute(AttributeTargets.Field, Inherited=false, AllowMultiple=false) */ 
public final class VBFixedArrayAttribute extends Attribute
AttributeUsageAttribute(AttributeTargets.Field, Inherited=false, AllowMultiple=false) 
public final class VBFixedArrayAttribute extends Attribute
Not applicable.

For more detailed information, see the Visual Basic topic VBFixedArrayAttribute Class.

Visual Basic arrays are of variable length by default. This attribute is useful when using Visual Basic file input and output functions, such as FileGet and FilePut, and API calls that require fixed-length arrays.

Structure Book
    <VBFixedArray(4)> Public Chapter() As Integer
End Structure

Sub WriteData()
    Dim FileNum As Integer = FreeFile()
    Dim MyBook As Book
    ReDim MyBook.Chapter(4)
    ' Add code to populate the array.
    MyBook.Chapter(0) = 1
    MyBook.Chapter(1) = 2
    MyBook.Chapter(2) = 3
    MyBook.Chapter(3) = 4
    MyBook.Chapter(4) = 5
    ' Write the array to a file.
    FileOpen(FileNum, "C:\testfile", OpenMode.Binary, _
             OpenAccess.Write, OpenShare.Default)
    FilePut(FileNum, MyBook) ' Write data.
    FileClose(FileNum)
End Sub

NoteNote:

The VBFixedArrayAttribute is informational and does not allocate any storage. The purpose of this attribute is to modify how arrays in structures and non-local variables are used by methods or API calls that recognize the VBFixedArrayAttribute. Keep in mind that this attribute does not convert a variable length array to a fixed array and that you must still allocate array storage using Dim or ReDim statements.

System.Object
   System.Attribute
    Microsoft.VisualBasic.VBFixedArrayAttribute

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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

Community Additions

ADD
Show:
© 2014 Microsoft