What is a Sender in windows form?

Question

Hi,

In my windows form apk when i want to chose event top of event for coding write =>Object sender

Answer 1

sender is the object that causes the event to happen.

In the case of an onclick-event on a button, it is the button.

You can use sender as an object and refer to it.

if(sender is Button)
// cast to Button
else if (sender is TextBox)
// cast to TextBox
else is (sender is CobmoBox)
// cast to ComboBox