EventInfo Class
Represents an event and provides access to its metadata.
Table of Contents
Syntax
public abstract class EventInfo : MemberInfo
Inheritance Hierarchy
Object
MemberInfo
EventInfo
Constructors
No public constructors are available for this class. This class cannot be inherited by users.
Properties
AddMethod- Gets the method used to add an event handler to the event.
EventHandlerType- Gets the delegate type for the event.
IsMulticast- Gets a value that indicates whether the event is multicast.
Name- Gets the name of the member.
DeclaringType- Gets the class that logically contains the member.
ReflectedType- Gets the class that is used to perform the reflection, and that has been used to get the member.
MetadataToken- Gets the metadata token for the current `MemberInfo`.
RaiseMethod- Gets the method that is used to raise the event.
RemoveMethod- Gets the method used to remove an event handler from the event.
Methods
AddEventHandler(Object target, Delegate handler)- Adds an event handler to the event.
Equals(Object obj)- Determines whether the specified object is equal to the current object.
GetAddMethod(Boolean nonPublic)- Gets the public or non-public add method for the event.
GetBaseDefinition()- Returns the EventInfo object that indicates the public ביותר event in the inheritance chain. This method may not return the correct results for events declared in certain types of generic types.
GetHashCode()- Serves as the default hash function.
GetMethodList(Boolean nonPublic)- Returns a list of the public or non-public methods of the event.
GetRemoveMethod(Boolean nonPublic)- Gets the public or non-public remove method for the event.
GetType()- Gets the Type of the current instance.
RemoveEventHandler(Object target, Delegate handler)- Removes an event handler from the event.
ToString()- Returns a string that represents the current object.
Remarks
The `EventInfo` class is used to inspect event declarations at run time. It allows you to retrieve information about the event, such as its name, declaring type, and the methods associated with adding or removing event handlers.
This class is part of the System.Reflection namespace, which provides types that allow late-bound access and inspection of a loaded assembly during run time.
Examples
The following example demonstrates how to retrieve and display information about events declared in a class.
using System;
using System.Reflection;
public class MyEvents
{
public event EventHandler MyCustomEvent;
public event Action AnotherEvent;
protected virtual void OnMyCustomEvent(EventArgs e)
{
MyCustomEvent?.Invoke(this, e);
}
}
public class Program
{
public static void Main(string[] args)
{
Type myEventsType = typeof(MyEvents);
EventInfo[] events = myEventsType.GetEvents();
Console.WriteLine($"Events declared in {myEventsType.Name}:");
foreach (EventInfo ev in events)
{
Console.WriteLine($" Name: {ev.Name}");
Console.WriteLine($" Handler Type: {ev.EventHandlerType.Name}");
Console.WriteLine($" Is Multicast: {ev.IsMulticast}");
MethodInfo addMethod = ev.GetAddMethod(true); // Get non-public add method
if (addMethod != null)
{
Console.WriteLine($" Add Method: {addMethod.Name}");
}
MethodInfo removeMethod = ev.GetRemoveMethod(true); // Get non-public remove method
if (removeMethod != null)
{
Console.WriteLine($" Remove Method: {removeMethod.Name}");
}
Console.WriteLine();
}
}
}