ConstructorInfo-Klasse
Ermittelt die Attribute eines Klassenkonstruktors und bietet Zugriff auf Metadaten des Konstruktors.
Namespace: System.Reflection
Assembly: mscorlib (in mscorlib.dll)
Syntax
'Declaration
<SerializableAttribute> _
<ComVisibleAttribute(True)> _
<ClassInterfaceAttribute(ClassInterfaceType.None)> _
Public MustInherit Class ConstructorInfo
Inherits MethodBase
Implements _ConstructorInfo
'Usage
Dim instance As ConstructorInfo
[SerializableAttribute]
[ComVisibleAttribute(true)]
[ClassInterfaceAttribute(ClassInterfaceType.None)]
public abstract class ConstructorInfo : MethodBase, _ConstructorInfo
[SerializableAttribute]
[ComVisibleAttribute(true)]
[ClassInterfaceAttribute(ClassInterfaceType::None)]
public ref class ConstructorInfo abstract : public MethodBase, _ConstructorInfo
/** @attribute SerializableAttribute() */
/** @attribute ComVisibleAttribute(true) */
/** @attribute ClassInterfaceAttribute(ClassInterfaceType.None) */
public abstract class ConstructorInfo extends MethodBase implements _ConstructorInfo
SerializableAttribute
ComVisibleAttribute(true)
ClassInterfaceAttribute(ClassInterfaceType.None)
public abstract class ConstructorInfo extends MethodBase implements _ConstructorInfo
Hinweise
ConstructorInfo wird zum Ermitteln der Attribute eines Konstruktors sowie zum Aufrufen eines Konstruktors verwendet. Objekte werden durch einen Aufruf von Invoke für eine ConstructorInfo erstellt, die entweder von der GetConstructors-Methode oder der GetConstructor-Methode eines Type-Objekts zurückgegeben wird.
Hinweis
ConstructorInfo erbt mehrere Member von MethodBase, z. B. IsGenericMethod, mit dem generische Methoden untersucht werden können. In .NET Framework, Version 2.0, können Konstruktoren nicht generisch sein, deshalb geben diese Member false oder NULL (Nothing in Visual Basic) zurück.
Hinweise für Erben Wenn Sie ConstructorInfo vererben, müssen Sie die folgende Memberüberladung überschreiben: Invoke(BindingFlags,Binder,Object[],CultureInfo).
Beispiel
Im folgenden Beispiel wird ConstructorInfo mit GetConstructor und BindingFlags für die Suche nach Konstruktoren verwendet, die mit den angegebenen Suchkriterien übereinstimmen.
Public Class MyClass1
Public Sub New(ByVal i As Integer)
End Sub
Public Shared Sub Main()
Try
Dim myType As Type = GetType(MyClass1)
Dim types(0) As Type
types(0) = GetType(Integer)
' Get the public instance constructor that takes an integer parameter.
Dim constructorInfoObj As ConstructorInfo = _
myType.GetConstructor(BindingFlags.Instance Or _
BindingFlags.Public, Nothing, _
CallingConventions.HasThis, types, Nothing)
If Not (constructorInfoObj Is Nothing) Then
Console.WriteLine("The constructor of MyClass1 that " + _
"is a public instance method and takes an " + _
"integer as a parameter is: ")
Console.WriteLine(constructorInfoObj.ToString())
Else
Console.WriteLine("The constructor MyClass1 that " + _
"is a public instance method and takes an " + _
"integer as a parameter is not available.")
End If
Catch e As ArgumentNullException
Console.WriteLine("ArgumentNullException: " + e.Message)
Catch e As ArgumentException
Console.WriteLine("ArgumentException: " + e.Message)
Catch e As SecurityException
Console.WriteLine("SecurityException: " + e.Message)
Catch e As Exception
Console.WriteLine("Exception: " + e.Message)
End Try
End Sub
End Class
using System;
using System.Reflection;
using System.Security;
public class MyClass1
{
public MyClass1(int i){}
public static void Main()
{
try
{
Type myType = typeof(MyClass1);
Type[] types = new Type[1];
types[0] = typeof(int);
// Get the public instance constructor that takes an integer parameter.
ConstructorInfo constructorInfoObj = myType.GetConstructor(
BindingFlags.Instance | BindingFlags.Public, null,
CallingConventions.HasThis, types, null);
if(constructorInfoObj != null)
{
Console.WriteLine("The constructor of MyClass1 that is a public " +
"instance method and takes an integer as a parameter is: ");
Console.WriteLine(constructorInfoObj.ToString());
}
else
{
Console.WriteLine("The constructor of MyClass1 that is a public instance " +
"method and takes an integer as a parameter is not available.");
}
}
catch(ArgumentNullException e)
{
Console.WriteLine("ArgumentNullException: " + e.Message);
}
catch(ArgumentException e)
{
Console.WriteLine("ArgumentException: " + e.Message);
}
catch(SecurityException e)
{
Console.WriteLine("SecurityException: " + e.Message);
}
catch(Exception e)
{
Console.WriteLine("Exception: " + e.Message);
}
}
}
using namespace System;
using namespace System::Reflection;
using namespace System::Security;
public ref class MyClass1
{
public:
MyClass1( int i ){}
};
int main()
{
try
{
Type^ myType = MyClass1::typeid;
array<Type^>^types = gcnew array<Type^>(1);
types[ 0 ] = int::typeid;
// Get the public instance constructor that takes an integer parameter.
ConstructorInfo^ constructorInfoObj = myType->GetConstructor( static_cast<BindingFlags>(BindingFlags::Instance | BindingFlags::Public), nullptr, CallingConventions::HasThis, types, nullptr );
if ( constructorInfoObj != nullptr )
{
Console::WriteLine( "The constructor of MyClass1 that is a public instance method and takes an integer as a parameter is: " );
Console::WriteLine( constructorInfoObj );
}
else
{
Console::WriteLine( "The constructor of MyClass1 that is a public instance method and takes an integer as a parameter is not available." );
}
}
catch ( ArgumentNullException^ e )
{
Console::WriteLine( "ArgumentNullException: {0}", e->Message );
}
catch ( ArgumentException^ e )
{
Console::WriteLine( "ArgumentException: {0}", e->Message );
}
catch ( SecurityException^ e )
{
Console::WriteLine( "SecurityException: {0}", e->Message );
}
catch ( Exception^ e )
{
Console::WriteLine( "Exception: {0}", e->Message );
}
}
import System.*;
import System.Reflection.*;
import System.Security.*;
public class MyClass1
{
public MyClass1(int i)
{
} //MyClass1
public static void main(String[] args)
{
try {
Type myType = MyClass1.class.ToType();
Type types[] = new Type[1];
types.set_Item(0, int.class.ToType());
// Get the public instance constructor that takes an
// integer parameter.
ConstructorInfo constructorInfoObj =
myType.GetConstructor(BindingFlags.Instance|BindingFlags.Public,
null, CallingConventions.HasThis, types, null);
if (constructorInfoObj != null) {
Console.WriteLine("The constructor of MyClass1 that is a public "
+ "instance method and takes an integer as a parameter is: ");
Console.WriteLine(constructorInfoObj.ToString());
}
else {
Console.WriteLine("The constructor of MyClass1 that is a "
+ "public instance method and takes an integer "
+ "as a parameter is not available.");
}
}
catch (ArgumentNullException e) {
Console.WriteLine("ArgumentNullException: " + e.get_Message());
}
catch (ArgumentException e) {
Console.WriteLine("ArgumentException: " + e.get_Message());
}
catch (SecurityException e) {
Console.WriteLine("SecurityException: " + e.get_Message());
}
catch (System.Exception e) {
Console.WriteLine("Exception: " + e.get_Message());
}
} //main
} //MyClass1
Vererbungshierarchie
System.Object
System.Reflection.MemberInfo
System.Reflection.MethodBase
System.Reflection.ConstructorInfo
Microsoft.JScript.JSConstructor
System.Reflection.Emit.ConstructorBuilder
Threadsicherheit
Dieser Typ ist sicher bei Multithreadoperationen.
Plattformen
Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile für Pocket PC, Windows Mobile für Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
.NET Framework unterstützt nicht alle Versionen sämtlicher Plattformen. Eine Liste der unterstützten Versionen finden Sie unter Systemanforderungen.
Versionsinformationen
.NET Framework
Unterstützt in: 2.0, 1.1, 1.0
.NET Compact Framework
Unterstützt in: 2.0, 1.0