ParameterInfo Class

Other Versions

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Discovers the attributes of a parameter and provides access to parameter metadata.

Inheritance Hierarchy

System::Object
System.Reflection::ParameterInfo

Namespace: System.Reflection
Assembly: mscorlib (in mscorlib.dll)

Syntax

C++

No code example is currently available or this language may not be supported.

The ParameterInfo type exposes the following members.

Constructors

	Name	Description
	ParameterInfo	Initializes a new instance of the ParameterInfo class.

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Properties

	Name	Description
	Attributes	Gets the attributes for this parameter.
	CustomAttributes	Gets a collection that contains this parameter's custom attributes.
	DefaultValue	Gets the default value, if the parameter has a default value.
	HasDefaultValue	Gets a value that indicates whether this parameter has a default value.
	IsIn	Gets a value indicating whether this is an input parameter.
	IsOptional	Gets a value indicating whether this parameter is optional.
	IsOut	Gets a value indicating whether this is an output parameter.
	IsRetval	Gets a value indicating whether this is a Retval parameter.
	Member	Gets the member in which the parameter is defined.
	MetadataToken	Gets a value that identifies this parameter in metadata.
	Name	Gets the name of the parameter.
	ParameterType	Gets the type of this parameter.
	Position	Gets the zero-based position of the parameter in the formal parameter list.

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Methods

	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)	Gets all the custom attributes defined on this parameter.
	GetCustomAttributes(Type, Boolean)	Gets the custom attributes of the specified type or its derived types that are applied to this parameter.
	GetHashCode	Serves as a hash function for a particular type. (Inherited from Object.)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	IsDefined	Determines whether the custom attribute of the specified type or its derived types is applied to this parameter.
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	ToString	Gets the parameter type and name represented as a string. (Overrides Object::ToString().)

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Extension Methods

	Name	Description
	GetCustomAttribute(Type)	Overloaded. Retrieves a custom attribute of a specified type that is applied to a specified parameter. (Defined by CustomAttributeExtensions.)
	GetCustomAttribute(Type, Boolean)	Overloaded. Retrieves a custom attribute of a specified type that is applied to a specified parameter, and optionally inspects the ancestors of that parameter. (Defined by CustomAttributeExtensions.)
	GetCustomAttribute<T>()	Overloaded. Retrieves a custom attribute of a specified type that is applied to a specified parameter. (Defined by CustomAttributeExtensions.)
	GetCustomAttribute<T>(Boolean)	Overloaded. Retrieves a custom attribute of a specified type that is applied to a specified parameter, and optionally inspects the ancestors of that parameter. (Defined by CustomAttributeExtensions.)
	GetCustomAttributes()	Overloaded. Retrieves a collection of custom attributes that are applied to a specified parameter. (Defined by CustomAttributeExtensions.)
	GetCustomAttributes(Type)	Overloaded. Retrieves a collection of custom attributes of a specified type that are applied to a specified parameter. (Defined by CustomAttributeExtensions.)
	GetCustomAttributes<T>()	Overloaded. Retrieves a collection of custom attributes of a specified type that are applied to a specified parameter. (Defined by CustomAttributeExtensions.)
	GetCustomAttributes<T>(Boolean)	Overloaded. Retrieves a collection of custom attributes of a specified type that are applied to a specified parameter, and optionally inspects the ancestors of that parameter. (Defined by CustomAttributeExtensions.)
	IsDefined	Indicates whether custom attributes of a specified type are applied to a specified parameter. (Defined by CustomAttributeExtensions.)

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Remarks

Use an instance of ParameterInfo to obtain information about the parameter's data type, default value, and so on.

MethodBase::GetParameters returns an array of ParameterInfo objects representing the parameters of a method, in order.

Examples

The following example defines a method with four parameters and uses the ParameterInfo::Attributes property to display the attributes of the parameters.