How to add an event to a UserControl in C#?

Question

I have a UserControl which contains 3 labels. I want to add an event for it, which occurs when the text of one of the labels changed.
I am using Visual Studio 2010

Answer 1

First you should declare an event in your usercontrol for example:

public event EventHandler TextOfLabelChanged;

then you have to call the call back function that is bound to your event(if there's any) in runtime.You can do this by handling the TextChanged event of a label like this:

public void LabelTextChanged(object sender,EventArgs e)
{
if(TextOfLabelChanged!=null)
TextOfLabelChanged(sender,e);
}

You can have your own EventArgs object if you like.

somewhere in your code you should bound your label TextChanged event to this method like this:

_myLabel.TextChanged+=LabelTextChanged;