FieldInfo Class
Assembly: mscorlib (in mscorlib.dll)
'Declaration <SerializableAttribute> _ <ComVisibleAttribute(True)> _ <ClassInterfaceAttribute(ClassInterfaceType.None)> _ Public MustInherit Class FieldInfo Inherits MemberInfo Implements _FieldInfo 'Usage Dim instance As FieldInfo
/** @attribute SerializableAttribute() */ /** @attribute ComVisibleAttribute(true) */ /** @attribute ClassInterfaceAttribute(ClassInterfaceType.None) */ public abstract class FieldInfo extends MemberInfo implements _FieldInfo
SerializableAttribute ComVisibleAttribute(true) ClassInterfaceAttribute(ClassInterfaceType.None) public abstract class FieldInfo extends MemberInfo implements _FieldInfo
The field information is obtained from metadata. The FieldInfo class does not have a public constructor. FieldInfo objects are obtained by calling either the GetFields or GetField method of a Type object.
Fields are variables defined in the class. FieldInfo provides access to the metadata for a field within a class and provides dynamic set and get functionality for the field. The class is not loaded into memory until invoke or get is called on the object.
Notes to Inheritors When you inherit from FieldInfo, you must override the following members: GetValue and SetValue.The following example uses the Type.GetFields method to get the field-related information from the FieldInfo class, and then displays field attributes.
Imports System Imports System.Reflection Imports Microsoft.VisualBasic Public Class FieldInfoClass Public myField1 As Integer = 0 Protected myField2 As String = Nothing Public Shared Sub Main() Dim myFieldInfo() As FieldInfo Dim myType As Type = GetType(FieldInfoClass) ' Get the type and fields of FieldInfoClass. myFieldInfo = myType.GetFields(BindingFlags.NonPublic Or _ BindingFlags.Instance Or BindingFlags.Public) Console.WriteLine(ControlChars.NewLine & "The fields of " & _ "FieldInfoClass class are " & ControlChars.NewLine) ' Display the field information of FieldInfoClass. Dim i As Integer For i = 0 To myFieldInfo.Length - 1 Console.WriteLine(ControlChars.NewLine + "Name : {0}", myFieldInfo(i).Name) Console.WriteLine("Declaring Type : {0}", myFieldInfo(i).DeclaringType) Console.WriteLine("IsPublic : {0}", myFieldInfo(i).IsPublic) Console.WriteLine("MemberType : {0}", myFieldInfo(i).MemberType) Console.WriteLine("FieldType : {0}", myFieldInfo(i).FieldType) Console.WriteLine("IsFamily : {0}", myFieldInfo(i).IsFamily) Next i End Sub End Class
import System.*;
import System.Reflection.*;
public class FieldInfoClass
{
public int myField1 = 0;
protected String myField2 = null;
public static void main(String[] args)
{
FieldInfo myFieldInfo[];
Type myType = FieldInfoClass.class.ToType();
// Get the type and fields of FieldInfoClass.
myFieldInfo = myType.GetFields(BindingFlags.NonPublic
| BindingFlags.Instance | BindingFlags.Public);
Console.WriteLine("\nThe fields of " + "FieldInfoClass are \n");
// Display the field information of FieldInfoClass.
for (int i = 0; i < myFieldInfo.length; i++) {
Console.WriteLine("\nName : {0}",
myFieldInfo[i].get_Name());
Console.WriteLine("Declaring Type : {0}",
myFieldInfo[i].get_DeclaringType());
Console.WriteLine("IsPublic : {0}",
System.Convert.ToString(myFieldInfo[i].get_IsPublic()));
Console.WriteLine("MemberType : {0}",
myFieldInfo[i].get_MemberType());
Console.WriteLine("FieldType : {0}",
myFieldInfo[i].get_FieldType());
Console.WriteLine("IsFamily : {0}",
System.Convert.ToString(myFieldInfo[i].get_IsFamily()));
}
} //main
} //FieldInfoClass
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.