ConstructorInfo Class
Discovers the attributes of a class constructor and provides access to constructor metadata.
System.Reflection.MemberInfo
System.Reflection.MethodBase
System.Reflection.ConstructorInfo
System.Reflection.Emit.ConstructorBuilder
Namespace: System.Reflection
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 that indicates the calling conventions for this method. (Inherited from MethodBase.) |
![]() ![]() ![]() | ContainsGenericParameters | Gets a value that indicates 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 that indicates whether the method is abstract (MustInherit in Visual Basic). (Inherited from MethodBase.) |
![]() ![]() ![]() | IsAssembly | Gets a value that indicates 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 that indicates whether the method is a constructor. (Inherited from MethodBase.) |
![]() ![]() ![]() | IsFamily | Gets a value that indicates 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 that indicates 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 that indicates 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 that indicates whether this method is final (NotOverridable in Visual Basic). (Inherited from MethodBase.) |
![]() ![]() ![]() | IsGenericMethod | Gets a value that indicates whether the method is generic. (Inherited from MethodBase.) |
![]() ![]() ![]() | IsGenericMethodDefinition | Gets a value that indicates whether the method is a generic method definition. (Inherited from MethodBase.) |
![]() ![]() ![]() | IsHideBySig | Gets a value that indicates 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 that indicates whether this member is private. (Inherited from MethodBase.) |
![]() ![]() ![]() | IsPublic | Gets a value that indicates whether this is a public method. (Inherited from MethodBase.) |
![]() ![]() ![]() | IsSpecialName | Gets a value that indicates whether this method has a special name. (Inherited from MethodBase.) |
![]() ![]() ![]() | IsStatic | Gets a value that indicates whether the method is static (Shared in Visual Basic). (Inherited from MethodBase.) |
![]() ![]() ![]() | IsVirtual | Gets a value that indicates whether the method is virtual (Overridable in Visual Basic). (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(Object) | Determines whether the specified Object is equal to the current Object. (Inherited from Object.) |
![]() ![]() ![]() | Finalize | Allows an object to try to free resources and perform other cleanup operations before the Object 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.) |
![]() ![]() ![]() | 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 | Serves as a hash function for a particular type. (Inherited from Object.) |
![]() ![]() ![]() | 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 this method or constructor. (Inherited from MethodBase.) |
![]() ![]() ![]() | GetType | Gets the Type of the current instance. (Inherited from Object.) |
![]() ![]() ![]() | Invoke(Object()) | Invokes the current constructor with the specified arguments. |
![]() ![]() ![]() | Invoke(Object, Object()) | Invokes the method or constructor represented by the current instance, using the specified parameters. (Inherited from MethodBase.) |
![]() ![]() ![]() | Invoke(BindingFlags, Binder, Object(), CultureInfo) | When implemented in a derived class, invokes the current constructor with the specified arguments, using the specified binder and culture to validate the argument types. |
![]() ![]() ![]() | Invoke(Object, BindingFlags, Binder, 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 | |
|---|---|---|
![]() ![]() ![]() ![]() | 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. |
In Silverlight, you cannot derive from this type.
ConstructorInfo is used to discover the attributes of a constructor and 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: |
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ConstructorInfo inherits several members from MethodBase, such as IsGenericMethod, that can be used to examine generic methods. Constructors cannot be generic, so these members return false or Nothing. |
Platform Notes
Silverlight for Windows Phone
The following example uses ConstructorInfo with GetConstructor and BindingFlags to find the constructors that match the specified search criteria.
Note: |
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To run this example, see Building Examples That Use a Demo Method and a TextBlock Control. |
Public Class Example Public Sub New(ByVal i As Integer) End Sub Public Shared Sub Demo(ByVal outputBlock As System.Windows.Controls.TextBlock) Dim myType As Type = GetType(Example) Dim parameters() As Type = { GetType(Int32) } ' Get the public instance constructor that takes an integer parameter. Dim ctor As ConstructorInfo = myType.GetConstructor( _ BindingFlags.Instance Or BindingFlags.Public, _ Type.DefaultBinder, _ parameters, _ Nothing) If ctor Is Nothing Then outputBlock.Text &= _ "There is no public instance constructor of MyClass " & _ "that takes an integer as a parameter." & vbCrLf Else outputBlock.Text &= _ "The public constructor of MyClass that takes an integer " & _ "as a parameter is: " & vbCrLf outputBlock.Text &= ctor.ToString() & vbCrLf End If End Sub End Class ' This example produces the following output: ' 'The public constructor of MyClass that takes an integer as a parameter is: 'Void .ctor(Int32)
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.







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