<Parameter> Element (.NET Native)

Článek
10/20/2022

Applies reflection policy to the type of the argument passed to a method.

Syntax

<Parameter Name="parameter_name"
           Activate="policy_type"
           Browse="policy_type"
           Dynamic="policy_type"
           Serialize="policy_type"
           DataContractSerializer="policy_type"
           DataContractJsonSerializer="policy_type"
           XmlSerializer="policy_type"
           MarshalObject="policy_type"
           MarshalDelegate="policy_type"
           MarshalStructure="policy_type" />

Attributes and Elements

The following sections describe attributes, child elements, and parent elements.

Attributes

Attribute	Attribute type	Description
`Name`	General	Required attribute. The parameter name. For example, for the method signature `String.CompareTo(Object value)`, the value of the `Name` attribute is "value".
`Activate`	Reflection	Optional attribute. Controls runtime access to constructors to enable activation of instances.
`Browse`	Reflection	Optional attribute. Controls querying for information about program elements, but does not enable any runtime access.
`Dynamic`	Reflection	Optional attribute. Controls runtime access to all type members, including constructors, methods, fields, properties, and events, to enable dynamic programming.
`Serialize`	Serialization	Optional attribute. Controls runtime access to constructors, fields, and properties, to enable type instances to be serialized and deserialized by libraries such as the Newtonsoft JSON serializer.
`DataContractSerializer`	Serialization	Optional attribute. Controls policy for serialization that uses the System.Runtime.Serialization.DataContractSerializer class.
`DataContractJsonSerializer`	Serialization	Optional attribute. Controls policy for JSON serialization that uses the System.Runtime.Serialization.DataContractSerializer class.
`XmlSerializer`	Serialization	Optional attribute. Controls policy for XML serialization that uses the System.Xml.Serialization.XmlSerializer class.
`MarshalObject`	Interop	Optional attribute. Controls policy for marshaling reference types to WinRT and COM.
`MarshalDelegate`	Interop	Optional attribute. Controls policy for marshaling delegate types as function pointers to native code.
`MarshalStructure`	Interop	Optional attribute. Controls policy for marshaling value types to native code.

Name attribute

Value	Description
parameter_name	The name of the method parameter to which policy is applied. For example, for the method signature `String.CompareTo(Object value)`, the value of the `Name` attribute is "value".

All other attributes

Value	Description
policy_setting	The setting to apply to this policy type. Possible values are `All`, `Public`, `PublicAndInternal`, `Required Public`, `Required PublicAndInternal`, and `Required All`. For more information, see Runtime Directive Policy Settings.

Child Elements

None.

Parent Elements

Element	Description
<Method>	Applies runtime reflection policy to a constructor or method.

Remarks

The <Parameter> element is a child of the <Method> element and is used to apply policy to a particular method parameter. The specific method parameter is specified by name rather than by type. At least one attribute that represents a policy type, such as Activate or Dynamic, must be present.

Sdílet prostřednictvím