Question

I want to keep checking the content of a label, if label changes I need to fire an event.
I have an enum of Day, Week or Month, if one of those values comes in the label, i want to change my chart according the value in the label?

Answer 1

You can use following code to know when content changed

DependencyPropertyDescriptor dpd = DependencyPropertyDescriptor.FromProperty(ContentControl.ContentProperty, typeof(Label));
            if (dpd != null)
            {
                dpd.AddValueChanged(label1, delegate
                {
                    // Add property change logic.
                });
            }

At “// Add property change logic” you can check label’s content ad fire event or do anything you want.