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Type.GetFields Method (BindingFlags)

When overridden in a derived class, searches for the fields defined for the current Type, using the specified binding constraints.

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

Public MustOverride Function GetFields ( _
	bindingAttr As BindingFlags _
) As FieldInfo()
Dim instance As Type
Dim bindingAttr As BindingFlags
Dim returnValue As FieldInfo()

returnValue = instance.GetFields(bindingAttr)
public abstract FieldInfo[] GetFields (
	BindingFlags bindingAttr
public abstract function GetFields (
	bindingAttr : BindingFlags
) : FieldInfo[]



A bitmask comprised of one or more BindingFlags that specify how the search is conducted.


Zero, to return a null reference (Nothing in Visual Basic).

Return Value

An array of FieldInfo objects representing all fields defined for the current Type that match the specified binding constraints. -or- An empty array of type FieldInfo, if no fields are defined for the current Type, or if none of the defined fields match the binding constraints.

The GetFields method does not return fields in a particular order, such as alphabetical or declaration order. Your code must not depend on the order in which fields are returned, because that order can vary.

The following BindingFlags filter flags can be used to define which fields to include in the search:

  • You must specify either BindingFlags.Instance or BindingFlags.Static in order to get a return.

  • Specify BindingFlags.Public to include public fields in the search.

  • Specify BindingFlags.NonPublic to include non-public fields (that is, private and protected fields) in the search.

  • Specify BindingFlags.FlattenHierarchy to include public and protected static members up the hierarchy; private static members in inherited classes are not included.

The following BindingFlags modifier flags can be used to change how the search works:

  • BindingFlags.DeclaredOnly to search only the fields declared on the Type, not fields that were simply inherited.

See System.Reflection.BindingFlags for more information.

If the requested type is non-public and the caller does not have ReflectionPermission to reflect non-public objects outside the current assembly, this method returns a null reference (Nothing in Visual Basic).

If the current Type represents a constructed generic type, this method returns the FieldInfo objects with the type parameters replaced by the appropriate type arguments.

If the current Type represents a type parameter in the definition of a generic type or generic method, this method searches the public fields of the class constraint.

The following example shows a use of the GetFields(BindingFlags) method.

Imports System
Imports System.Reflection
Imports Microsoft.VisualBasic

Class AttributesSample

    Public Sub Mymethod(ByVal int1m As Integer, ByRef str2m As String, ByRef str3m As String)
        str2m = "in Mymethod"
    End Sub 'Mymethod

    Public Shared Function Main(ByVal args() As String) As Integer
        Console.WriteLine("Reflection.MethodBase.Attributes Sample")

        ' Get the type.
        Dim MyType As Type = Type.GetType("AttributesSample")

        ' Get the method Mymethod on the type.
        Dim Mymethodbase As MethodBase = MyType.GetMethod("Mymethod")

        ' Display the method name.
        Console.WriteLine("Mymethodbase = {0}.", Mymethodbase)

        ' Get the MethodAttribute enumerated value.
        Dim Myattributes As MethodAttributes = Mymethodbase.Attributes

        ' Display the flags that are set.
        PrintAttributes(GetType(System.Reflection.MethodAttributes), CInt(Myattributes))
        Return 0
    End Function 'Main

    Public Shared Sub PrintAttributes(ByVal attribType As Type, ByVal iAttribValue As Integer)
        If Not attribType.IsEnum Then
            Console.WriteLine("This type is not an enum.")
        End If
        Dim fields As FieldInfo() = attribType.GetFields((BindingFlags.Public Or BindingFlags.Static))
        Dim i As Integer
        For i = 0 To fields.Length - 1
            Dim fieldvalue As Integer = CType(fields(i).GetValue(Nothing), Int32)
            If (fieldvalue And iAttribValue) = fieldvalue Then
            End If
        Next i
    End Sub 'PrintAttributes
End Class 'AttributesSample

import System.*;
import System.Reflection.*;

class AttributesSample
    public void MyMethod(int int1m,
		/** @ref
		 */ String str2m,
        /** @ref
         */ String str3m)
        str2m = "in MyMethod";
    } //MyMethod

    public static void main(String[] args)
        Console.WriteLine("Reflection.MethodBase.Attributes Sample");

        // Get the type.
        Type myType = Type.GetType("AttributesSample");

        // Get the method MyMethod on the type.
        MethodBase myMethodBase = myType.GetMethod("MyMethod");

        // Display the method name.
        Console.WriteLine(("myMethodBase = " + myMethodBase));

        // Get the MethodAttribute enumerated value.
        MethodAttributes myAttributes = myMethodBase.get_Attributes();

        // Display the flags that are set.
        PrintAttributes(System.Reflection.MethodAttributes .class.ToType(),
    } //main

    public static void PrintAttributes(Type attribType, int iAttribValue)
        if (!(attribType.get_IsEnum())) {
            Console.WriteLine("This type is not an enum.");
            return ;
        FieldInfo fields[] = attribType.GetFields(
		    (BindingFlags.Public | BindingFlags.Static));
        for(int i=0;i < fields.length;i++) {
            int fieldValue = (int) ((Int32)(fields[i].GetValue(null)));
            if ((fieldValue & iAttribValue) == fieldValue  ) {
    } //PrintAttributes
} //AttributesSample

 import System;
 import System.Reflection;
 class AttributesSample
    public function Mymethod (int1m : int) : void
    public static function Main() : void
       Console.WriteLine ("Reflection.MethodBase.Attributes Sample");
       // Get our type
       var MyType : Type = Type.GetType("AttributesSample");
       // Get the method Mymethod on our type
       var Mymethodbase : MethodBase = MyType.GetMethod("Mymethod");
       // Print out the method
       Console.WriteLine("Mymethodbase = " + Mymethodbase);
       // Get the MethodAttribute enumerated value
       var Myattributes : MethodAttributes = Mymethodbase.Attributes;
       // print out the flags set
       PrintAttributes( System.Reflection.MethodAttributes, int(Myattributes) );
    public static function PrintAttributes( attribType : Type, iAttribValue : int ) : void 
       if ( ! attribType.IsEnum ) { Console.WriteLine( "This type is not an enum" ); return; }
       var fields : FieldInfo[] = attribType.GetFields(BindingFlags.Public | BindingFlags.Static);
       for ( var i:int = 0; i < fields.Length; i++ )
          var fieldvalue : int = int(fields[i].GetValue(null));
          if ( (fieldvalue & iAttribValue) == fieldvalue )
             Console.WriteLine( "\t" + fields[i].Name );
 This code produces the following output:
Reflection.MethodBase.Attributes Sample
Mymethodbase = Void Mymethod(Int32)

  • ReflectionPermission  for reflecting non-public objects. Associated enumeration: ReflectionPermissionFlag.TypeInformation

Windows 98, Windows 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 .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0