Question

I’m new to c#, in my program im using DateTimePicker Value changed event but i found ValueChanged event occurs when the user clicks on arrow or if the value is changed programatically as well, I want to identify only the user interacts of the DateTimePicker (not when the value is changed programatically), Is there any way to do this?

Answer 1

Yes, take a look at the MSDN documentation. Especially, the OnValueChanged event

You will need to wire your control up using this event:

In a constructor method:

dateTimePickerControl.ValueChanged += new EventHandler(picker_ValueChanged);

And here is the method signature:

void f_ValueChanged(object sender, EventArgs e)
    {
        //Do whatever you need when the value changes here
    }

You can also do this from the designer. If you go to the Properties, then Events portion, it lists all of the events. Just double click and it will create the method signature and wiring for you.

UPDATE TO YOUR UPDATE

If you specifically want to check whether this is a programmatic change or not, then you want to do something like this:

Create a global variable in your class

    Boolean isProgrammaticEvent = false;

Before your programmatic change:

   

 isProgrammaticEvent = true;
    //Change picker value

In your event wiring:

   

 void f_ValueChanged(object sender, EventArgs e)
    {
        Boolean isThisProgrammatic = isProgrammaticEvent;
        isProgrammaticEvent = false;
        if(isThisProgrammatic)
            return;
        //Do whatever you need when the value changes here
    }