How to remove all event handlers from an event

Question

To create a new event handler on a control you can do this

c.Click += new EventHandler(mainFormButton_Click);

or this

c.Cli         


        

Answer 1

Sometimes we have to work with ThirdParty controls and we need to build these awkward solutions. Based in @Anoop Muraleedharan answer I created this solution with inference type and ToolStripItem support

    public static void RemoveItemEvents(this T target, string eventName) 
        where T : ToolStripItem
    {            
        RemoveObjectEvents(target, eventName);
    }

    public static void RemoveControlEvents(this T target, string eventName)
        where T : Control
    {
        RemoveObjectEvents(target, eventName);
    }

    private static void RemoveObjectEvents(T target, string Event) where T : class
    {
        var typeOfT = typeof(T);
        var fieldInfo = typeOfT.BaseType.GetField(
            Event, BindingFlags.Static | BindingFlags.NonPublic);
        var provertyValue = fieldInfo.GetValue(target);
        var propertyInfo = typeOfT.GetProperty(
            "Events", BindingFlags.NonPublic | BindingFlags.Instance);
        var eventHandlerList = (EventHandlerList)propertyInfo.GetValue(target, null);
        eventHandlerList.RemoveHandler(provertyValue, eventHandlerList[provertyValue]);
    }

And you can use it like this

    var toolStripButton = new ToolStripButton();
    toolStripButton.RemoveItemEvents("EventClick");

    var button = new Button();
    button.RemoveControlEvents("EventClick");