Question

I have a Slider whose value can be changed either by user, or through the code (e.g. slider.Value = 20;.

There is also an event listener for the slider, ValueChanged.
However, I want to suppress the call to the event handler when changing its value programmatically. That is, i dont want the slider.Value = 20; fire the event.

Any hints are appreciated.

Answer 1

You’ll notice the slider creates a line in the designer:

this.slider.ValueChanged += new System.EventHandler(this.OnValueChanged);

This binds the event to the event handler. You can remove this programatically:

this.slider.ValueChanged -= new System.EventHandler(this.OnValueChanged);

Hope this helps