Class EventMemberDescriptor

Class providing easier marshalling of CLR events. Handling is limited to a narrow range of handler signatures, which, however, covers in practice most of all available events.

Inheritance

System.Object

EventMemberDescriptor

Namespace: System.Dynamic.ExpandoObject

Assembly: cs.temp.dll.dll

Syntax

public class EventMemberDescriptor : IMemberDescriptor

Constructors

EventMemberDescriptor(EventInfo, InteropAccessMode)

Initializes a new instance of the EventMemberDescriptor class.

Declaration

public EventMemberDescriptor(EventInfo ei, InteropAccessMode accessMode = InteropAccessMode.Default)

Parameters

EventInfo ei The ei.

InteropAccessMode accessMode The access mode.

Fields

MAX_ARGS_IN_DELEGATE

The maximum number of arguments supported in an event handler delegate

Declaration

public const int MAX_ARGS_IN_DELEGATE = 16

Field Value

System.Int32

Properties

EventInfo

Gets the EventInfo object of the event described by this descriptor

Declaration

public EventInfo EventInfo { get; }

Property Value

EventInfo

IsStatic

Gets a value indicating whether the event described by this descriptor is static.

Declaration

public bool IsStatic { get; }

Property Value

System.Boolean

MemberAccess

Gets the types of access supported by this member

Declaration

public MemberDescriptorAccess MemberAccess { get; }

Property Value

MemberDescriptorAccess

Name

Gets the name of the member

Declaration

public string Name { get; }

Property Value

System.String

Methods

CheckEventIsCompatible(EventInfo, Boolean)

Checks if the event is compatible with a standard descriptor

Declaration

public static bool CheckEventIsCompatible(EventInfo ei, bool throwException)

Parameters

EventInfo ei The EventInfo.

System.Boolean throwException if set to true an exception with the proper error message is thrown if not compatible.

Returns

System.Boolean

Exceptions

System.ArgumentException Thrown if throwException is true and one of this applies: The event is declared in a value type or The event does not have both add and remove methods or The event handler type doesn't implement a public Invoke method or The event handler has a return type which is not System.Void or The event handler has more than MAX_ARGS_IN_DELEGATE parameters or The event handler has a value type parameter or a by ref parameter or The event handler signature is not a valid method according to CheckMethodIsCompatible(MethodBase, Boolean)

GetValue(Script, Object)

Gets a dynvalue which is a facade supporting add/remove methods which is callable from scripts

Declaration

public DynValue GetValue(Script script, object obj)

Parameters

Script script The script.

System.Object obj The object for which the facade should be written.

Returns

DynValue

SetValue(Script, Object, DynValue)

Sets the value.

Declaration

public void SetValue(Script script, object obj, DynValue v)

Parameters

Script script The script.

System.Object obj The object.

DynValue v The v.

TryCreateIfVisible(EventInfo, InteropAccessMode)

Tries to create a new StandardUserDataEventDescriptor, returning null in case the method is not visible to script code.

Declaration

public static EventMemberDescriptor TryCreateIfVisible(EventInfo ei, InteropAccessMode accessMode)

Parameters

EventInfo ei The EventInfo.

InteropAccessMode accessMode The InteropAccessMode

Returns

EventMemberDescriptor A new StandardUserDataEventDescriptor or null.