Object Sender Eventargs E Private

Object Sender Eventargs E Private

What are the parameters (Object sender, EventArgs e) in the events? – C#
I was reviewing the topic of events in C#, I looked for some examples and I usually see examples where the following fields appear (object sender , EventArgs e), this is a code that I understand related to the topic of events and does not have the fields (object sender ,eventargs e) I also clarify that I understand the issue of delegates and all this code fragment, my problem is with the other format.
but I can't understand very well the other event syntax format, that is, according to lei sender it refers to the class that triggered the event and eventargs to the fields, but I can't understand it well… for example: if I had more than a parameter, would I have to put something like (object sender,eventsargs A , eventargs B)?
It would help me if you could explain to me in some simple code what these 2 fields are and why sender is so necessary.
In event handlers there are usually two input parameters: object sender and EventArgs e .
Let's take a look at the handler for a ButtonClick event:
Here, sender refers to the object that fired the event. That is, in this case it will contain the instance of the button that fired the Click event.
As for EventArgs , this is a generic class for passing event information. In the case of a button's Click event, it doesn't really contain anything since only the generic class is passed. But let's look at another event, for example MouseClick :
As you can see, in this case the EventArgs generic class is not passed, but MouseEventArgs . The signature of this class is as follows:
That is, it inherits from EventArgs and contains several properties that give information about the event: Button , Clicks , Delta , Location , X and Y .
If I had more than one parameter, would I have to put something like (object sender,eventsargs A , eventargs B)?
No. What you need to do is create a class that inherits from EventArgs , with the properties you need to create to pass the information that interests you, and the signature of your EventHandler would be something like
and you would access the properties with e . MiPropiedad1 , e . MiPropiedad2 , etc.
I hope I have been able to explain myself well, if you have any questions or do not understand something, do not hesitate to comment and I will try to improve my answer.

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An event handler is a method that is bound to an event. When the event is raised, the code within the event handler is executed. Each event handler provides two parameters that allow you to handle the event properly. The following example shows an event handler for a Button control's Click event.
The first parameter, sender , provides a reference to the object that raised the event. The second parameter, e , in the example above, passes an object specific to the event that is being handled. By referencing the object's properties (and, sometimes, its methods), you can obtain information such as the location of the mouse for mouse events or data being transferred in drag-and-drop events.
Typically each event produces an event handler with a different event-object type for the second parameter. Some event handlers, such as those for the MouseDown and MouseUp events, have the same object type for their second parameter. For these types of events, you can use the same event handler to handle both events.
You can also use the same event handler to handle the same event for different controls. For example, if you have a group of RadioButton controls on a form, you could create a single event handler for the Click event and have each control's Click event bound to the single event handler. For more information, see How to: Connect Multiple Events to a Single Event Handler in Windows Forms .

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I was wondering what eventargs stands and how object sender get created and what actually it means?

What I have tried:

I got this in every eventhandler that got generated and I don't know where it come from

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It is built-in to .Net. Sender is the control that causes the event to fire. EventArgs can be useful in some events.

Also, the very first google result for me is: .NET Events - What are object sender & EventArgs e? - Stack Overflow [ ^ ]

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Basicly the Page_Load function is an event handler. The sender is the event raising object, and the e variable is the event arguments. Take a look into the following subjects:
Handling and Raising Events [ ^ ][ ^ ]
Delegates (C# Programming Guide) [ ^ ]

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Don't tell someone to read the manual. Chances are they have and don't get it.
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