ConstructorInfo Class
Discovers the attributes of a class constructor and provides access to constructor metadata.
System.Reflection::MemberInfo
System.Reflection::MethodBase
System.Reflection::ConstructorInfo
Microsoft.JScript::JSConstructor
System.Reflection.Emit::ConstructorBuilder
Assembly: mscorlib (in mscorlib.dll)
The ConstructorInfo type exposes the following members.
| Name | Description | |
|---|---|---|
![]() ![]() | Attributes | Gets the attributes associated with this method. (Inherited from MethodBase.) |
![]() ![]() ![]() | CallingConvention | Gets a value indicating the calling conventions for this method. (Inherited from MethodBase.) |
![]() ![]() ![]() | ContainsGenericParameters | Gets a value indicating whether the generic method contains unassigned generic type parameters. (Inherited from MethodBase.) |
![]() ![]() ![]() | DeclaringType | Gets the class that declares this member. (Inherited from MemberInfo.) |
![]() ![]() ![]() | IsAbstract | Gets a value indicating whether the method is abstract. (Inherited from MethodBase.) |
![]() ![]() ![]() | IsAssembly | Gets a value indicating whether the potential visibility of this method or constructor is described by MethodAttributes::Assembly; that is, the method or constructor is visible at most to other types in the same assembly, and is not visible to derived types outside the assembly. (Inherited from MethodBase.) |
![]() ![]() ![]() | IsConstructor | Gets a value indicating whether the method is a constructor. (Inherited from MethodBase.) |
![]() ![]() ![]() | IsFamily | Gets a value indicating whether the visibility of this method or constructor is described by MethodAttributes::Family; that is, the method or constructor is visible only within its class and derived classes. (Inherited from MethodBase.) |
![]() ![]() ![]() | IsFamilyAndAssembly | Gets a value indicating whether the visibility of this method or constructor is described by MethodAttributes::FamANDAssem; that is, the method or constructor can be called by derived classes, but only if they are in the same assembly. (Inherited from MethodBase.) |
![]() ![]() ![]() | IsFamilyOrAssembly | Gets a value indicating whether the potential visibility of this method or constructor is described by MethodAttributes::FamORAssem; that is, the method or constructor can be called by derived classes wherever they are, and by classes in the same assembly. (Inherited from MethodBase.) |
![]() ![]() ![]() | IsFinal | Gets a value indicating whether this method is final. (Inherited from MethodBase.) |
![]() ![]() ![]() | IsGenericMethod | Gets a value indicating whether the method is generic. (Inherited from MethodBase.) |
![]() ![]() ![]() | IsGenericMethodDefinition | Gets a value indicating whether the method is a generic method definition. (Inherited from MethodBase.) |
![]() ![]() ![]() | IsHideBySig | Gets a value indicating whether only a member of the same kind with exactly the same signature is hidden in the derived class. (Inherited from MethodBase.) |
![]() ![]() ![]() | IsPrivate | Gets a value indicating whether this member is private. (Inherited from MethodBase.) |
![]() ![]() ![]() | IsPublic | Gets a value indicating whether this is a public method. (Inherited from MethodBase.) |
![]() | IsSecurityCritical | Gets a value that indicates whether the current method or constructor is security-critical or security-safe-critical at the current trust level, and therefore can perform critical operations. (Inherited from MethodBase.) |
![]() | IsSecuritySafeCritical | Gets a value that indicates whether the current method or constructor is security-safe-critical at the current trust level; that is, whether it can perform critical operations and can be accessed by transparent code. (Inherited from MethodBase.) |
![]() | IsSecurityTransparent | Gets a value that indicates whether the current method or constructor is transparent at the current trust level, and therefore cannot perform critical operations. (Inherited from MethodBase.) |
![]() ![]() ![]() | IsSpecialName | Gets a value indicating whether this method has a special name. (Inherited from MethodBase.) |
![]() ![]() ![]() | IsStatic | Gets a value indicating whether the method is static. (Inherited from MethodBase.) |
![]() ![]() ![]() | IsVirtual | Gets a value indicating whether the method is virtual. (Inherited from MethodBase.) |
![]() ![]() ![]() | MemberType | Gets a MemberTypes value indicating that this member is a constructor. (Overrides MemberInfo::MemberType.) |
![]() | MetadataToken | Gets a value that identifies a metadata element. (Inherited from MemberInfo.) |
![]() ![]() ![]() | MethodHandle | Gets a handle to the internal metadata representation of a method. (Inherited from MethodBase.) |
![]() ![]() | Module | Gets the module in which the type that declares the member represented by the current MemberInfo is defined. (Inherited from MemberInfo.) |
![]() ![]() ![]() | Name | Gets the name of the current member. (Inherited from MemberInfo.) |
![]() ![]() ![]() | ReflectedType | Gets the class object that was used to obtain this instance of MemberInfo. (Inherited from MemberInfo.) |
| Name | Description | |
|---|---|---|
![]() ![]() ![]() | Equals | Returns a value that indicates whether this instance is equal to a specified object. (Overrides MethodBase::Equals(Object).) In XNA Framework 3.0, this member is inherited from Object::Equals(Object). In Portable Class Library Portable Class Library, this member is inherited from Object::Equals(Object). |
![]() ![]() ![]() | Finalize | Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.) |
![]() ![]() ![]() | GetCustomAttributes(Boolean) | When overridden in a derived class, returns an array of all custom attributes applied to this member. (Inherited from MemberInfo.) |
![]() ![]() ![]() | GetCustomAttributes(Type, Boolean) | When overridden in a derived class, returns an array of custom attributes applied to this member and identified by Type. (Inherited from MemberInfo.) |
![]() | GetCustomAttributesData | Returns a list of CustomAttributeData objects representing data about the attributes that have been applied to the target member. (Inherited from MemberInfo.) |
![]() ![]() ![]() | GetGenericArguments | Returns an array of Type objects that represent the type arguments of a generic method or the type parameters of a generic method definition. (Inherited from MethodBase.) |
![]() ![]() ![]() | GetHashCode | Returns the hash code for this instance. (Overrides MethodBase::GetHashCode().) In XNA Framework 3.0, this member is inherited from Object::GetHashCode(). In Portable Class Library Portable Class Library, this member is inherited from Object::GetHashCode(). |
![]() | GetMethodBody | When overridden in a derived class, gets a MethodBody object that provides access to the MSIL stream, local variables, and exceptions for the current method. (Inherited from MethodBase.) |
![]() | GetMethodImplementationFlags | When overridden in a derived class, returns the MethodImplAttributes flags. (Inherited from MethodBase.) |
![]() ![]() ![]() | GetParameters | When overridden in a derived class, gets the parameters of the specified method or constructor. (Inherited from MethodBase.) |
![]() ![]() ![]() | GetType | Gets the Type of the current instance. (Inherited from Object.) |
![]() ![]() ![]() | Invoke(array<Object>) | Invokes the constructor reflected by the instance that has the specified parameters, providing default values for the parameters not commonly used. |
![]() ![]() ![]() | Invoke(Object, array<Object>) | Invokes the method or constructor represented by the current instance, using the specified parameters. (Inherited from MethodBase.) |
![]() ![]() | Invoke(BindingFlags, Binder, array<Object>, CultureInfo) | When implemented in a derived class, invokes the constructor reflected by this ConstructorInfo with the specified arguments, under the constraints of the specified Binder. |
![]() ![]() | Invoke(Object, BindingFlags, Binder, array<Object>, CultureInfo) | When overridden in a derived class, invokes the reflected method or constructor with the given parameters. (Inherited from MethodBase.) |
![]() ![]() ![]() | IsDefined | When overridden in a derived class, indicates whether one or more attributes of the specified type or of its derived types is applied to this member. (Inherited from MemberInfo.) |
![]() ![]() ![]() | MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object.) |
![]() ![]() ![]() | ToString | Returns a string that represents the current object. (Inherited from Object.) |
| Name | Description | |
|---|---|---|
![]() ![]() | Equality | Indicates whether two ConstructorInfo objects are equal. |
![]() ![]() | Inequality | Indicates whether two ConstructorInfo objects are not equal. |
| Name | Description | |
|---|---|---|
![]() ![]() ![]() ![]() | ConstructorName | Represents the name of the class constructor method as it is stored in metadata. This name is always ".ctor". This field is read-only. |
![]() ![]() ![]() ![]() | TypeConstructorName | Represents the name of the type constructor method as it is stored in metadata. This name is always ".cctor". This property is read-only. |
| Name | Description | |
|---|---|---|
![]() ![]() | _ConstructorInfo::GetIDsOfNames | Maps a set of names to a corresponding set of dispatch identifiers. |
![]() ![]() | _ConstructorInfo::GetType | Gets a Type object representing the ConstructorInfo type. |
![]() ![]() | _ConstructorInfo::GetTypeInfo | Retrieves the type information for an object, which can then be used to get the type information for an interface. |
![]() ![]() | _ConstructorInfo::GetTypeInfoCount | Retrieves the number of type information interfaces that an object provides (either 0 or 1). |
![]() ![]() | _ConstructorInfo::Invoke | Provides access to properties and methods exposed by an object. |
![]() ![]() | _ConstructorInfo::Invoke_2 | Provides COM objects with version-independent access to the MethodBase::Invoke(Object, BindingFlags, Binder, array<Object>, CultureInfo) method. |
![]() ![]() | _ConstructorInfo::Invoke_3 | Provides COM objects with version-independent access to the MethodBase::Invoke(Object, array<Object>) method. |
![]() ![]() | _ConstructorInfo::Invoke_4 | Provides COM objects with version-independent access to the ConstructorInfo::Invoke(BindingFlags, Binder, array<Object>, CultureInfo) method. |
![]() ![]() | _ConstructorInfo::Invoke_5 | Provides COM objects with version-independent access to the ConstructorInfo::Invoke(array<Object>) method. |
![]() ![]() | _MemberInfo::GetIDsOfNames | Maps a set of names to a corresponding set of dispatch identifiers. (Inherited from MemberInfo.) |
![]() ![]() | _MemberInfo::GetType | Gets a Type object representing the MemberInfo class. (Inherited from MemberInfo.) |
![]() ![]() | _MemberInfo::GetTypeInfo | Retrieves the type information for an object, which can then be used to get the type information for an interface. (Inherited from MemberInfo.) |
![]() ![]() | _MemberInfo::GetTypeInfoCount | Retrieves the number of type information interfaces that an object provides (either 0 or 1). (Inherited from MemberInfo.) |
![]() ![]() | _MemberInfo::Invoke | Provides access to properties and methods exposed by an object. (Inherited from MemberInfo.) |
![]() ![]() | _MethodBase::GetIDsOfNames | Maps a set of names to a corresponding set of dispatch identifiers. (Inherited from MethodBase.) |
![]() ![]() | _MethodBase::GetType | For a description of this member, see _MethodBase::GetType. (Inherited from MethodBase.) |
![]() ![]() | _MethodBase::GetTypeInfo | Retrieves the type information for an object, which can then be used to get the type information for an interface. (Inherited from MethodBase.) |
![]() ![]() | _MethodBase::GetTypeInfoCount | Retrieves the number of type information interfaces that an object provides (either 0 or 1). (Inherited from MethodBase.) |
![]() ![]() | _MethodBase::Invoke | Provides access to properties and methods exposed by an object. (Inherited from MethodBase.) |
![]() ![]() | _MethodBase::IsAbstract | For a description of this member, see _MethodBase::IsAbstract. (Inherited from MethodBase.) |
![]() ![]() | _MethodBase::IsAssembly | For a description of this member, see _MethodBase::IsAssembly. (Inherited from MethodBase.) |
![]() ![]() | _MethodBase::IsConstructor | For a description of this member, see _MethodBase::IsConstructor. (Inherited from MethodBase.) |
![]() ![]() | _MethodBase::IsFamily | For a description of this member, see _MethodBase::IsFamily. (Inherited from MethodBase.) |
![]() ![]() | _MethodBase::IsFamilyAndAssembly | For a description of this member, see _MethodBase::IsFamilyAndAssembly. (Inherited from MethodBase.) |
![]() ![]() | _MethodBase::IsFamilyOrAssembly | For a description of this member, see _MethodBase::IsFamilyOrAssembly. (Inherited from MethodBase.) |
![]() ![]() | _MethodBase::IsFinal | For a description of this member, see _MethodBase::IsFinal. (Inherited from MethodBase.) |
![]() ![]() | _MethodBase::IsHideBySig | For a description of this member, see _MethodBase::IsHideBySig. (Inherited from MethodBase.) |
![]() ![]() | _MethodBase::IsPrivate | For a description of this member, see _MethodBase::IsPrivate. (Inherited from MethodBase.) |
![]() ![]() | _MethodBase::IsPublic | For a description of this member, see _MethodBase::IsPublic. (Inherited from MethodBase.) |
![]() ![]() | _MethodBase::IsSpecialName | For a description of this member, see _MethodBase::IsSpecialName. (Inherited from MethodBase.) |
![]() ![]() | _MethodBase::IsStatic | For a description of this member, see _MethodBase::IsStatic. (Inherited from MethodBase.) |
![]() ![]() | _MethodBase::IsVirtual | For a description of this member, see _MethodBase::IsVirtual. (Inherited from MethodBase.) |
ConstructorInfo is used to discover the attributes of a constructor as well as to invoke a constructor. Objects are created by calling Invoke on a ConstructorInfo returned by either the GetConstructors or GetConstructor method of a Type object.
Note |
|---|
ConstructorInfo inherits from MethodBase several members, such as IsGenericMethod, that can be used to examine generic methods. In the .NET Framework version 2.0 constructors cannot be generic, so these members return false or nullptr. |
When you inherit from ConstructorInfo, you must override the following member overload: Invoke(BindingFlags, Binder, array<Object>, CultureInfo).
The following example uses ConstructorInfo with GetConstructor and BindingFlags to find the constructors that match the specified search criteria.
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 ); } }
- SecurityAction::InheritanceDemand
for full trust for inheritors. This class cannot be inherited by partially trusted code.
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.


