CustomAttributeBuilder クラス
定義
カスタム属性の構築を支援します。Helps build custom attributes.
public ref class CustomAttributeBuilder
public ref class CustomAttributeBuilder : System::Runtime::InteropServices::_CustomAttributeBuilder
public class CustomAttributeBuilder
[System.Runtime.InteropServices.ClassInterface(System.Runtime.InteropServices.ClassInterfaceType.None)]
public class CustomAttributeBuilder : System.Runtime.InteropServices._CustomAttributeBuilder
[System.Runtime.InteropServices.ClassInterface(System.Runtime.InteropServices.ClassInterfaceType.None)]
[System.Runtime.InteropServices.ComVisible(true)]
public class CustomAttributeBuilder : System.Runtime.InteropServices._CustomAttributeBuilder
type CustomAttributeBuilder = class
[<System.Runtime.InteropServices.ClassInterface(System.Runtime.InteropServices.ClassInterfaceType.None)>]
type CustomAttributeBuilder = class
interface _CustomAttributeBuilder
[<System.Runtime.InteropServices.ClassInterface(System.Runtime.InteropServices.ClassInterfaceType.None)>]
[<System.Runtime.InteropServices.ComVisible(true)>]
type CustomAttributeBuilder = class
interface _CustomAttributeBuilder
Public Class CustomAttributeBuilder
Public Class CustomAttributeBuilder
Implements _CustomAttributeBuilder
- 継承
-
CustomAttributeBuilder
- 属性
- 実装
例
次のコードサンプルは、の使用方法を示してい CustomAttributeBuilder
ます。The following code sample illustrates the use of CustomAttributeBuilder
.
using namespace System;
using namespace System::Threading;
using namespace System::Reflection;
using namespace System::Reflection::Emit;
// We will apply this custom attribute to our dynamic type.
public ref class ClassCreator: public Attribute
{
private:
String^ creator;
public:
property String^ Creator
{
String^ get()
{
return creator;
}
}
ClassCreator( String^ name )
{
this->creator = name;
}
};
// We will apply this dynamic attribute to our dynamic method.
public ref class DateLastUpdated: public Attribute
{
private:
String^ dateUpdated;
public:
property String^ DateUpdated
{
String^ get()
{
return dateUpdated;
}
}
DateLastUpdated( String^ theDate )
{
this->dateUpdated = theDate;
}
};
Type^ BuildTypeWithCustomAttributesOnMethod()
{
AppDomain^ currentDomain = Thread::GetDomain();
AssemblyName^ myAsmName = gcnew AssemblyName;
myAsmName->Name = "MyAssembly";
AssemblyBuilder^ myAsmBuilder = currentDomain->DefineDynamicAssembly( myAsmName, AssemblyBuilderAccess::Run );
ModuleBuilder^ myModBuilder = myAsmBuilder->DefineDynamicModule( "MyModule" );
// First, we'll build a type with a custom attribute attached.
TypeBuilder^ myTypeBuilder = myModBuilder->DefineType( "MyType", TypeAttributes::Public );
array<Type^>^temp6 = {String::typeid};
array<Type^>^ctorParams = temp6;
ConstructorInfo^ classCtorInfo = ClassCreator::typeid->GetConstructor( ctorParams );
array<Object^>^temp0 = {"Joe Programmer"};
CustomAttributeBuilder^ myCABuilder = gcnew CustomAttributeBuilder( classCtorInfo,temp0 );
myTypeBuilder->SetCustomAttribute( myCABuilder );
// Now, let's build a method and add a custom attribute to it.
array<Type^>^temp1 = gcnew array<Type^>(0);
MethodBuilder^ myMethodBuilder = myTypeBuilder->DefineMethod( "HelloWorld", MethodAttributes::Public, nullptr, temp1 );
array<Type^>^temp7 = {String::typeid};
ctorParams = temp7;
classCtorInfo = DateLastUpdated::typeid->GetConstructor( ctorParams );
array<Object^>^temp2 = {DateTime::Now.ToString()};
CustomAttributeBuilder^ myCABuilder2 = gcnew CustomAttributeBuilder( classCtorInfo,temp2 );
myMethodBuilder->SetCustomAttribute( myCABuilder2 );
ILGenerator^ myIL = myMethodBuilder->GetILGenerator();
myIL->EmitWriteLine( "Hello, world!" );
myIL->Emit( OpCodes::Ret );
return myTypeBuilder->CreateType();
}
int main()
{
Type^ myType = BuildTypeWithCustomAttributesOnMethod();
Object^ myInstance = Activator::CreateInstance( myType );
array<Object^>^customAttrs = myType->GetCustomAttributes( true );
Console::WriteLine( "Custom Attributes for Type 'MyType':" );
Object^ attrVal = nullptr;
System::Collections::IEnumerator^ myEnum = customAttrs->GetEnumerator();
while ( myEnum->MoveNext() )
{
Object^ customAttr = safe_cast<Object^>(myEnum->Current);
array<Object^>^temp3 = gcnew array<Object^>(0);
attrVal = ClassCreator::typeid->InvokeMember( "Creator", BindingFlags::GetProperty, nullptr, customAttr, temp3 );
Console::WriteLine( "-- Attribute: [{0} = \"{1}\"]", customAttr, attrVal );
}
Console::WriteLine( "Custom Attributes for Method 'HelloWorld()' in 'MyType':" );
customAttrs = myType->GetMember( "HelloWorld" )[ 0 ]->GetCustomAttributes( true );
System::Collections::IEnumerator^ myEnum2 = customAttrs->GetEnumerator();
while ( myEnum2->MoveNext() )
{
Object^ customAttr = safe_cast<Object^>(myEnum2->Current);
array<Object^>^temp4 = gcnew array<Object^>(0);
attrVal = DateLastUpdated::typeid->InvokeMember( "DateUpdated", BindingFlags::GetProperty, nullptr, customAttr, temp4 );
Console::WriteLine( "-- Attribute: [{0} = \"{1}\"]", customAttr, attrVal );
}
Console::WriteLine( "---" );
array<Object^>^temp5 = gcnew array<Object^>(0);
Console::WriteLine( myType->InvokeMember( "HelloWorld", BindingFlags::InvokeMethod, nullptr, myInstance, temp5 ) );
}
using System;
using System.Threading;
using System.Reflection;
using System.Reflection.Emit;
// We will apply this custom attribute to our dynamic type.
public class ClassCreator: Attribute
{
private string creator;
public string Creator
{
get
{
return creator;
}
}
public ClassCreator(string name)
{
this.creator = name;
}
}
// We will apply this dynamic attribute to our dynamic method.
public class DateLastUpdated: Attribute
{
private string dateUpdated;
public string DateUpdated
{
get
{
return dateUpdated;
}
}
public DateLastUpdated(string theDate)
{
this.dateUpdated = theDate;
}
}
class MethodBuilderCustomAttributesDemo
{
public static Type BuildTypeWithCustomAttributesOnMethod()
{
AppDomain currentDomain = Thread.GetDomain();
AssemblyName myAsmName = new AssemblyName();
myAsmName.Name = "MyAssembly";
AssemblyBuilder myAsmBuilder = currentDomain.DefineDynamicAssembly(
myAsmName, AssemblyBuilderAccess.Run);
ModuleBuilder myModBuilder = myAsmBuilder.DefineDynamicModule("MyModule");
// First, we'll build a type with a custom attribute attached.
TypeBuilder myTypeBuilder = myModBuilder.DefineType("MyType",
TypeAttributes.Public);
Type[] ctorParams = new Type[] { typeof(string) };
ConstructorInfo classCtorInfo = typeof(ClassCreator).GetConstructor(ctorParams);
CustomAttributeBuilder myCABuilder = new CustomAttributeBuilder(
classCtorInfo,
new object[] { "Joe Programmer" });
myTypeBuilder.SetCustomAttribute(myCABuilder);
// Now, let's build a method and add a custom attribute to it.
MethodBuilder myMethodBuilder = myTypeBuilder.DefineMethod("HelloWorld",
MethodAttributes.Public,
null,
new Type[] { });
ctorParams = new Type[] { typeof(string) };
classCtorInfo = typeof(DateLastUpdated).GetConstructor(ctorParams);
CustomAttributeBuilder myCABuilder2 = new CustomAttributeBuilder(
classCtorInfo,
new object[] { DateTime.Now.ToString() });
myMethodBuilder.SetCustomAttribute(myCABuilder2);
ILGenerator myIL = myMethodBuilder.GetILGenerator();
myIL.EmitWriteLine("Hello, world!");
myIL.Emit(OpCodes.Ret);
return myTypeBuilder.CreateType();
}
public static void Main()
{
Type myType = BuildTypeWithCustomAttributesOnMethod();
object myInstance = Activator.CreateInstance(myType);
object[] customAttrs = myType.GetCustomAttributes(true);
Console.WriteLine("Custom Attributes for Type 'MyType':");
object attrVal = null;
foreach (object customAttr in customAttrs)
{
attrVal = typeof(ClassCreator).InvokeMember("Creator",
BindingFlags.GetProperty,
null, customAttr, new object[] { });
Console.WriteLine("-- Attribute: [{0} = \"{1}\"]", customAttr, attrVal);
}
Console.WriteLine("Custom Attributes for Method 'HelloWorld()' in 'MyType':");
customAttrs = myType.GetMember("HelloWorld")[0].GetCustomAttributes(true);
foreach (object customAttr in customAttrs)
{
attrVal = typeof(DateLastUpdated).InvokeMember("DateUpdated",
BindingFlags.GetProperty,
null, customAttr, new object[] { });
Console.WriteLine("-- Attribute: [{0} = \"{1}\"]", customAttr, attrVal);
}
Console.WriteLine("---");
Console.WriteLine(myType.InvokeMember("HelloWorld",
BindingFlags.InvokeMethod,
null, myInstance, new object[] { }));
}
}
Imports System.Threading
Imports System.Reflection
Imports System.Reflection.Emit
_
' We will apply this custom attribute to our dynamic type.
Public Class ClassCreator
Inherits Attribute
Private creator As String
Public ReadOnly Property GetCreator() As String
Get
Return creator
End Get
End Property
Public Sub New(name As String)
Me.creator = name
End Sub
End Class
_
' We will apply this dynamic attribute to our dynamic method.
Public Class DateLastUpdated
Inherits Attribute
Private dateUpdated As String
Public ReadOnly Property GetDateUpdated() As String
Get
Return dateUpdated
End Get
End Property
Public Sub New(theDate As String)
Me.dateUpdated = theDate
End Sub
End Class
_
Class MethodBuilderCustomAttributesDemo
Public Shared Function BuildTypeWithCustomAttributesOnMethod() As Type
Dim currentDomain As AppDomain = Thread.GetDomain()
Dim myAsmName As New AssemblyName()
myAsmName.Name = "MyAssembly"
Dim myAsmBuilder As AssemblyBuilder = currentDomain.DefineDynamicAssembly(myAsmName, _
AssemblyBuilderAccess.Run)
Dim myModBuilder As ModuleBuilder = myAsmBuilder.DefineDynamicModule("MyModule")
' First, we'll build a type with a custom attribute attached.
Dim myTypeBuilder As TypeBuilder = myModBuilder.DefineType("MyType", _
TypeAttributes.Public)
Dim ctorParams() As Type = {GetType(String)}
Dim classCtorInfo As ConstructorInfo = GetType(ClassCreator).GetConstructor(ctorParams)
Dim myCABuilder As New CustomAttributeBuilder(classCtorInfo, _
New Object() {"Joe Programmer"})
myTypeBuilder.SetCustomAttribute(myCABuilder)
' Now, let's build a method and add a custom attribute to it.
Dim myMethodBuilder As MethodBuilder = myTypeBuilder.DefineMethod("HelloWorld", _
MethodAttributes.Public, Nothing, New Type() {})
ctorParams = New Type() {GetType(String)}
classCtorInfo = GetType(DateLastUpdated).GetConstructor(ctorParams)
Dim myCABuilder2 As New CustomAttributeBuilder(classCtorInfo, _
New Object() {DateTime.Now.ToString()})
myMethodBuilder.SetCustomAttribute(myCABuilder2)
Dim myIL As ILGenerator = myMethodBuilder.GetILGenerator()
myIL.EmitWriteLine("Hello, world!")
myIL.Emit(OpCodes.Ret)
Return myTypeBuilder.CreateType()
End Function 'BuildTypeWithCustomAttributesOnMethod
Public Shared Sub Main()
Dim myType As Type = BuildTypeWithCustomAttributesOnMethod()
Dim myInstance As Object = Activator.CreateInstance(myType)
Dim customAttrs As Object() = myType.GetCustomAttributes(True)
Console.WriteLine("Custom Attributes for Type 'MyType':")
Dim attrVal As Object = Nothing
Dim customAttr As Object
For Each customAttr In customAttrs
attrVal = GetType(ClassCreator).InvokeMember("GetCreator", _
BindingFlags.GetProperty, _
Nothing, customAttr, New Object() {})
Console.WriteLine("-- Attribute: [{0} = ""{1}""]", customAttr, attrVal)
Next customAttr
Console.WriteLine("Custom Attributes for Method 'HelloWorld()' in 'MyType':")
customAttrs = myType.GetMember("HelloWorld")(0).GetCustomAttributes(True)
For Each customAttr In customAttrs
attrVal = GetType(DateLastUpdated).InvokeMember("GetDateUpdated", _
BindingFlags.GetProperty, _
Nothing, customAttr, New Object() {})
Console.WriteLine("-- Attribute: [{0} = ""{1}""]", customAttr, attrVal)
Next customAttr
Console.WriteLine("---")
Console.WriteLine(myType.InvokeMember("HelloWorld", BindingFlags.InvokeMethod, _
Nothing, myInstance, New Object() {}))
End Sub
End Class
注釈
コンストラクターに CustomAttributeBuilder
よって返されたオブジェクトを使用して、カスタム属性を記述します。Use the CustomAttributeBuilder
object returned by the constructor to describe the custom attribute. ビルダーインスタンス CustomAttribute
でメソッドを呼び出して、をビルダーインスタンスに関連付け SetCustomAttribute
ます。Associate the CustomAttribute
with a builder instance by calling the SetCustomAttribute
method on that builder instance. たとえば、の CustomAttributeBuilder
AssemblyCultureAttribute
コンストラクターとその引数を指定することによって、のインスタンスを記述するを作成し AssemblyCultureAttribute ます。For example, create a CustomAttributeBuilder
to describe an instance of AssemblyCultureAttribute
by supplying the constructor of AssemblyCultureAttribute and its argument. 次に SetCustomAttribute 、に対してを呼び出して AssemblyBuilder
、アソシエーションを確立します。Then call SetCustomAttribute on an AssemblyBuilder
to establish the association.
コンストラクター
CustomAttributeBuilder(ConstructorInfo, Object[]) |
カスタム属性のコンストラクター、およびコンストラクターに渡す引数を指定して、 |
CustomAttributeBuilder(ConstructorInfo, Object[], FieldInfo[], Object[]) |
カスタム属性のコンストラクター、そのコンストラクターの引数、および名前付きフィールドと値のペアのセットを指定して、 |
CustomAttributeBuilder(ConstructorInfo, Object[], PropertyInfo[], Object[]) |
カスタム属性のコンストラクター、そのコンストラクターの引数、および名前付きプロパティまたは値のペアのセットを指定して、 |
CustomAttributeBuilder(ConstructorInfo, Object[], PropertyInfo[], Object[], FieldInfo[], Object[]) |
カスタム属性のコンストラクター、そのコンストラクターの引数、名前付きプロパティまたは値のペアのセット、および名前付きフィールドまたは値のペアのセットを指定して、 |
メソッド
Equals(Object) |
指定されたオブジェクトが現在のオブジェクトと等しいかどうかを判断します。Determines whether the specified object is equal to the current object. (継承元 Object) |
GetHashCode() |
既定のハッシュ関数として機能します。Serves as the default hash function. (継承元 Object) |
GetType() |
現在のインスタンスの Type を取得します。Gets the Type of the current instance. (継承元 Object) |
MemberwiseClone() |
現在の Object の簡易コピーを作成します。Creates a shallow copy of the current Object. (継承元 Object) |
ToString() |
現在のオブジェクトを表す文字列を返します。Returns a string that represents the current object. (継承元 Object) |
明示的なインターフェイスの実装
_CustomAttributeBuilder.GetIDsOfNames(Guid, IntPtr, UInt32, UInt32, IntPtr) |
一連の名前を対応する一連のディスパッチ識別子に割り当てます。Maps a set of names to a corresponding set of dispatch identifiers. |
_CustomAttributeBuilder.GetTypeInfo(UInt32, UInt32, IntPtr) |
オブジェクトの型情報を取得します。この型情報を使用して、インターフェイスの型情報を取得できます。Retrieves the type information for an object, which can then be used to get the type information for an interface. |
_CustomAttributeBuilder.GetTypeInfoCount(UInt32) |
オブジェクトが提供する型情報インターフェイスの数 (0 または 1) を取得します。Retrieves the number of type information interfaces that an object provides (either 0 or 1). |
_CustomAttributeBuilder.Invoke(UInt32, Guid, UInt32, Int16, IntPtr, IntPtr, IntPtr, IntPtr) |
オブジェクトによって公開されたプロパティおよびメソッドへのアクセスを提供します。Provides access to properties and methods exposed by an object. |