FieldBuilder.ReflectedType Eigenschap
Definitie
Belangrijk
Bepaalde informatie heeft betrekking op een voorlopige productversie die aanzienlijk kan worden gewijzigd voordat deze wordt uitgebracht. Microsoft biedt geen enkele expliciete of impliciete garanties met betrekking tot de informatie die hier wordt verstrekt.
Geeft de verwijzing naar het Type object aan waaruit dit object is verkregen. Deze eigenschap is alleen-lezen.
public:
virtual property Type ^ ReflectedType { Type ^ get(); };
public override Type ReflectedType { get; }
member this.ReflectedType : Type
Public Overrides ReadOnly Property ReflectedType As Type
Waarde van eigenschap
Een verwijzing naar het Type object waaruit dit exemplaar is verkregen.
Opmerkingen
Een FieldBuilder object vertegenwoordigt een veld van een bepaalde klasse. Om een FieldBuilder object te verkrijgen, wordt een query uitgevoerd op het Type object dat de klasse vertegenwoordigt die het veld ondersteunt. Deze eigenschap bevat een verwijzing naar dat Type object.
Het volgende codevoorbeeld illustreert het gebruik van ReflectedType.
using System;
using System.Threading;
using System.Reflection;
using System.Reflection.Emit;
using System.Security.Permissions;
public class FieldBuilder_Sample
{
private static Type CreateType(AppDomain currentDomain)
{
// Create an assembly.
AssemblyName myAssemblyName = new AssemblyName();
myAssemblyName.Name = "DynamicAssembly";
AssemblyBuilder myAssembly =
currentDomain.DefineDynamicAssembly(myAssemblyName,AssemblyBuilderAccess.Run);
// Create a dynamic module in Dynamic Assembly.
ModuleBuilder myModuleBuilder=myAssembly.DefineDynamicModule("MyModule");
// Define a public class named "MyClass" in the assembly.
TypeBuilder myTypeBuilder= myModuleBuilder.DefineType("MyClass",TypeAttributes.Public);
// Define a private String field named "MyField" in the type.
FieldBuilder myFieldBuilder= myTypeBuilder.DefineField("MyField",
typeof(string),FieldAttributes.Private|FieldAttributes.Static);
// Create the constructor.
Type[] constructorArgs = { typeof(String) };
ConstructorBuilder myConstructor = myTypeBuilder.DefineConstructor(
MethodAttributes.Public, CallingConventions.Standard, constructorArgs);
ILGenerator constructorIL = myConstructor.GetILGenerator();
constructorIL.Emit(OpCodes.Ldarg_0);
ConstructorInfo superConstructor = typeof(Object).GetConstructor(new Type[0]);
constructorIL.Emit(OpCodes.Call, superConstructor);
constructorIL.Emit(OpCodes.Ldarg_0);
constructorIL.Emit(OpCodes.Ldarg_1);
constructorIL.Emit(OpCodes.Stfld, myFieldBuilder);
constructorIL.Emit(OpCodes.Ret);
// Create the MyMethod method.
MethodBuilder myMethodBuilder= myTypeBuilder.DefineMethod("MyMethod",
MethodAttributes.Public,typeof(String),null);
ILGenerator methodIL = myMethodBuilder.GetILGenerator();
methodIL.Emit(OpCodes.Ldarg_0);
methodIL.Emit(OpCodes.Ldfld, myFieldBuilder);
methodIL.Emit(OpCodes.Ret);
if (myFieldBuilder.Attributes.Equals(FieldAttributes.Static))
{
Console.WriteLine("Field attribute defined as Static");
}
else if(myFieldBuilder.Attributes.Equals(FieldAttributes.Static|FieldAttributes.Private))
{
Console.WriteLine("Field attributes are Static and Private");
}
Console.WriteLine("ReflectedType of Field is: " + myFieldBuilder.ReflectedType);
return myTypeBuilder.CreateType();
}
public static void Main()
{
Type myType = CreateType(Thread.GetDomain());
// Create an instance of the "HelloWorld" class.
Object helloWorld = Activator.CreateInstance(myType, new Object[] { "HelloWorld" });
// Invoke the "MyMethod" of the "MyClass".
Object myObject = myType.InvokeMember("MyMethod",
BindingFlags.InvokeMethod, null, helloWorld, null);
Console.WriteLine("MyClass.MyMethod returned: \"" + myObject + "\"");
}
}
Imports System.Threading
Imports System.Reflection
Imports System.Reflection.Emit
Imports System.Security.Permissions
Public Class FieldBuilder_Sample
Private Shared Function CreateType(currentDomain As AppDomain) As Type
' Create an assembly.
Dim myAssemblyName As New AssemblyName()
myAssemblyName.Name = "DynamicAssembly"
Dim myAssembly As AssemblyBuilder = currentDomain.DefineDynamicAssembly(myAssemblyName, _
AssemblyBuilderAccess.Run)
' Create a dynamic module in Dynamic Assembly.
Dim myModuleBuilder As ModuleBuilder = myAssembly.DefineDynamicModule("MyModule")
' Define a public class named "MyClass" in the assembly.
Dim myTypeBuilder As TypeBuilder = myModuleBuilder.DefineType("MyClass", _
TypeAttributes.Public)
' Define a private String field named "MyField" in the type.
Dim myFieldBuilder As FieldBuilder = myTypeBuilder.DefineField("MyField", _
GetType(String), FieldAttributes.Private Or FieldAttributes.Static)
' Create the constructor.
Dim constructorArgs As Type() ={GetType(String)}
Dim myConstructor As ConstructorBuilder = _
myTypeBuilder.DefineConstructor(MethodAttributes.Public, _
CallingConventions.Standard, constructorArgs)
Dim constructorIL As ILGenerator = myConstructor.GetILGenerator()
constructorIL.Emit(OpCodes.Ldarg_0)
Dim superConstructor As ConstructorInfo = GetType(Object).GetConstructor(New Type() { })
constructorIL.Emit(OpCodes.Call, superConstructor)
constructorIL.Emit(OpCodes.Ldarg_0)
constructorIL.Emit(OpCodes.Ldarg_1)
constructorIL.Emit(OpCodes.Stfld, myFieldBuilder)
constructorIL.Emit(OpCodes.Ret)
' Create the MyMethod method.
Dim myMethodBuilder As MethodBuilder =myTypeBuilder.DefineMethod("MyMethod", _
MethodAttributes.Public, GetType(String), Nothing)
Dim methodIL As ILGenerator = myMethodBuilder.GetILGenerator()
methodIL.Emit(OpCodes.Ldarg_0)
methodIL.Emit(OpCodes.Ldfld, myFieldBuilder)
methodIL.Emit(OpCodes.Ret)
If myFieldBuilder.Attributes.Equals(FieldAttributes.Static) Then
Console.WriteLine("Field attribute defined as Static")
Else
If myFieldBuilder.Attributes.Equals(FieldAttributes.Static Or FieldAttributes.Private) Then
Console.WriteLine("Field attributes are Static and Private")
End If
End If
Console.WriteLine("ReflectedType of Field is: " & myFieldBuilder.ReflectedType.ToString())
Return myTypeBuilder.CreateType()
End Function 'CreateType
<PermissionSetAttribute(SecurityAction.Demand, Name:="FullTrust")> _
Public Shared Sub Main()
Dim myType As Type = CreateType(Thread.GetDomain())
' Create an instance of the "HelloWorld" class.
Dim helloWorld As Object = Activator.CreateInstance(myType, New Object() { "HelloWorld" })
' Invoke the "MyMethod" of the "MyClass".
Dim myObject As Object = myType.InvokeMember("MyMethod", _
BindingFlags.InvokeMethod, Nothing, helloWorld, Nothing)
Console.WriteLine("MyClass.MyMethod returned: """ & myObject & """")
End Sub
End Class