Inheriting Button

[Soulless]

Hi,

I have a form that I need to place 3 buttons on. I would like the 3
buttons to call the same method, perhaps with different arguments.

In Powerbuilder, I could create a visual button object and code for
it, then inherit from that and place it on my form/window.

Does C# have anything like this? Is this possible?

Thanks!

 

[Chris Shepherd]

Hi,

I have a form that I need to place 3 buttons on. I would like the 3
buttons to call the same method, perhaps with different arguments.

Why not simply provide the same event handler for all three buttons?
If they will all call the same method with different arguments, you may
as well just have three separate event handlers.
If say two of the three will be the same, it might be simpler to have
them share an event handler then check the sender, a la:

Button first = new Button("One");
Button second = new Button("Two");
Button third = new Button("Three");

first.Click += new EventHandler(mySpecialButton_Click);
second.Click += new EventHandler(mySpecialButton_Click);
third.Click += new EventHandler(mySpecialButton_Click);

private void mySpecialButton_Click(object sender, EventArgs e)
{
if (sender == first)
SomeOtherMethod("arg1", "arg2", overloaded_int);
else
SomeOtherMethod("arg1", "arg2");
}


Either way, it doesn't look like you need inheritance at all.

Chris.

 

[Guest]

Soulless,
this is called overriding method in the Object oriented programming, find
below a good guide for that
http://www.devhood.com/tutorials/tutorial_details.aspx?tutorial_id=328

regards,
Husam Al-A'araj
www.aaraj.net

 

[Soulless]

Why not simply provide the same event handler for all three buttons?
If they will all call the same method with different arguments, you may
as well just have three separate event handlers.
If say two of the three will be the same, it might be simpler to have
them share an event handler then check the sender, a la:

Button first = new Button("One");
Button second = new Button("Two");
Button third = new Button("Three");

first.Click += new EventHandler(mySpecialButton_Click);
second.Click += new EventHandler(mySpecialButton_Click);
third.Click += new EventHandler(mySpecialButton_Click);

private void mySpecialButton_Click(object sender, EventArgs e)
{
if (sender == first)
SomeOtherMethod("arg1", "arg2", overloaded_int);
else
SomeOtherMethod("arg1", "arg2");

}

Either way, it doesn't look like you need inheritance at all.

Chris.

Thanks!!!!

 

[Jon Skeet [C# MVP]]

I have a form that I need to place 3 buttons on. I would like the 3
buttons to call the same method, perhaps with different arguments.

In Powerbuilder, I could create a visual button object and code for
it, then inherit from that and place it on my form/window.

Does C# have anything like this? Is this possible?

Well, you *can* derive from Button - but I wouldn't advise it in this
case. Why not just use three separate instances of the normal button
class, and hook the Click events up to the same method?