Type.GetFields Method (BindingFlags)

Updated: September 2009

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 abstract function GetFields(
	bindingAttr : BindingFlags
) : FieldInfo[]

Parameters

bindingAttr
Type: System.Reflection.BindingFlags

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

-or-

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

Return Value

Type: System.Reflection.FieldInfo[]
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.

Implements

_Type.GetFields(BindingFlags)
IReflect.GetFields(BindingFlags)

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 varies.

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, internal, and protected fields) in the search. Only protected and internal fields on base classes are returned; private fields on base classes are not returned.

  • 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 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.

 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 );
          }
       }
    }
 }
 AttributesSample.Main();
/* 
 This code produces the following output:

Reflection.MethodBase.Attributes Sample
Mymethodbase = Void Mymethod(Int32)
        PrivateScope
        FamANDAssem
        Family
        Public
        Virtual
        HideBySig
        VtableLayoutMask
        ReuseSlot
        NewSlot
*/

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, Xbox 360, Zune

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

XNA Framework

Supported in: 3.0, 2.0, 1.0

Date

History

Reason

September 2009

Noted that private members of base types are not returned.

Content bug fix.

September 2009

Removed an erroneous statement that a null reference (Nothing in Visual Basic) is returned for non-public members outside the assembly, if caller lacks ReflectionPermission.

Content bug fix.

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