在按下另一个按钮后重置先前按下的按钮的颜色c＃

Question

I'm using C# windows form application, and i'm facing a problem resetting a button's back Color.

By clicking a button I need it to change its back color and reset the back color of previously pressed button.

Please note that i have lots of buttons in the form and i'm using "sender" to apply same clicking event to all buttons.

Answer 1

You'll need to keep track of the last button that was clicked. Add a private field and then manipulate it in the on click event handler:

class Form1 : Form
{
    private Button _lastButtonClicked;

    protected void ClickHandler(object sender, EventArgs e)
    {
        if (_lastButtonClicked != null)
           _lastButtonClicked.BackColor = Color.whatever;

        _lastButtonClicked = sender as Button;
        _lastButtonClicked = Color.newcolor;
    }
}