Question

I need to redraw a control after it was resized and not while it is being resized because it takes a lot of time to redraw a control and it wastes a lot of resources.

My control inherits Control class and I’m overriding the OnResize event.

PS: OnSizeChanged is absolutely the same

Answer 1

One solution can be resizeing your control only after the parent control/form finished resizeing. You can do this using the ‘ResizeEnd` event.

For example:

private void UserControl1_Load(object sender, EventArgs e)
{
    ((Form)this.Parent).ResizeEnd += new EventHandler(UserControl1_ResizeEnd);
}
void UserControl1_ResizeEnd(object sender, EventArgs e)
{
    MessageBox.Show("Resize end");
}