generic method for collection of command buttons

Question

How can we provide single generic method for collection of command buttons. I have collection of digit(0, 1,2..) command buttons and need to have single event method for all of them as they have similar behavior.

do you mean invoking each button with one single method?? like commandButtons1.Click += new EventHandler(object sender, EventArgs e) — Selalu_Ingin_Belajar, Oct 31 '12 at 03:06

score 2 · Answer 1 · answered Oct 31 '12 at 02:59

The pattern for delegates for events is use two parameters. One is the sender, the other is the eventargs. You can do something based on the sender or you can put some stuff in the tag

void OnButtonClick(object sender, EventArgs e)
        {
            Button button = sender as Button;

            object data = button.Tag;
            DoSomething(data);
        }

score 1 · Accepted Answer · edited May 23 '17 at 12:03

You can achieve this by Multicast Delegates

Define GenericButtonClick event handler this way:

void OnGenenicButtonClick(object sender, EventArgs e)
{
    var btn = sender as Button;
    // ... do something ...
}

Assign the GenericButtonClick event delegate this way (in say Load event handler):

cmdBtn1.Click += OnGenenicButtonClick;
cmdBtn2.Click += OnGenenicButtonClick;
//...

Reference:

You can also have a look at the difference of Simple Delegate (delegate) vs. Multicast delegates

generic method for collection of command buttons

2 Answers2