can someone explain this code? Button btn = (Button)sender;

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Hii i'm beginner

C#

protected void Button_Click(object sender, EventArgs e)
{
Button btn = (Button)sender;
btn.Text = (Int32.Parse(btn.Text) + 1).ToString();

}

Posted 13-Nov-12 20:37pm

mhassan083

Updated 18-Sep-20 22:19pm

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Pro Idiot · Answer 1 · 2012-11-13T20:42:00

sender refers to the object that invoked the event that fired the event handler. This is useful if you have many objects using the same event handler.

Here the "Button_Click" function should be called on the click of a button , hence you are tracking the button click event.

//Button btn = (Button)sender;

as sender is the button , you are creating a object of the same button class and typecasting the button object and assigning to a local object, then accessing it's properties.

This is useful if you have many objects using the same event handler.