Type.GetFields Method (BindingFlags)
Assembly: mscorlib (in mscorlib.dll)
public abstract FieldInfo[] GetFields ( BindingFlags bindingAttr )
public abstract function GetFields ( bindingAttr : BindingFlags ) : FieldInfo[]
Not applicable.
Parameters
- bindingAttr
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
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 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 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 filed 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.
using namespace System; using namespace System::Reflection; using namespace System::Runtime::InteropServices; public ref class AttributesSample { public: void Mymethod( int int1m, [Out]interior_ptr<String^> str2m, interior_ptr<String^> str3m ) { *str2m = "in Mymethod"; } }; void PrintAttributes( Type^ attribType, int iAttribValue ) { if ( !attribType->IsEnum ) { Console::WriteLine( "This type is not an enum." ); return; } array<FieldInfo^>^fields = attribType->GetFields( static_cast<BindingFlags>(BindingFlags::Public | BindingFlags::Static) ); for ( int i = 0; i < fields->Length; i++ ) { int fieldvalue = safe_cast<Int32>(fields[ i ]->GetValue( nullptr )); if ( (fieldvalue & iAttribValue) == fieldvalue ) { Console::WriteLine( fields[ i ]->Name ); } } } int main() { 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 = {0}", Mymethodbase ); // Get the MethodAttribute enumerated value. MethodAttributes Myattributes = Mymethodbase->Attributes; // Display the flags that are set. PrintAttributes( System::Reflection::MethodAttributes::typeid, (int)Myattributes ); return 0; }
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(),
(int)(myAttributes));
} //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 ) {
Console.WriteLine(fields[i].get_Name());
}
}
} //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 ); } } } } 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 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.