How to implement ScrollEventHandler-CodePudding

I am trying to implement the ScrollEventHandler and I keep getting the following error:

Cannot implicitly convert type 'System.Windows.Forms.ScrollEventHandler' to 'System.EventHandler'

Here is my code:

zoomBar.Scroll  = new ScrollEventHandler(this.zoomBar_Scroll);

And here is the method:

private void zoomBar_Scroll(object sender, ScrollEventArgs e)
        {

            if ( e.OldValue > e.NewValue)
            {

                wChart.zoomMinus();

            }
            else
            {

                wChart.zoomPlus();
            }

        }

I think this matches exactly what is in the Microsoft documentation but I must be missing something.

Here is a screenshot of the metadata for scroll

CodePudding user response：

Try this:

zoomBar.Scroll  = (sender, e) =>
{
    if (e.OldValue > e.NewValue)
    {
        wChart.zoomMinus();
    }
    else
    {
        wChart.zoomPlus();
    }
};

CodePudding user response：

I got the scrollbar event and the trackbar event confused. ScrollEventsArgs goes with ScrollBar not TrackBar. But as someone pointed out in the comments there is a mistake in the documentation that indicates ScrollEventsArgs works with TrackBar but it does not.