How to find out if datetime picker value is changed or not?

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There are two events. One is ValueChanged and another one is TextChanged

If value is changed then I can do something that is my need actually

But following two conditions getting same error

How to know the value is changed or not?

C#

if (datetimepicker.ValueChanged == true)
       {
          strMonthCode = "JAN";
        }
      else if (datetimepicker.TextChanged == true)
        {
          strMonthCode = "FEB";
        }

In both cases I am getting an error

Posted 14-May-13 2:11am

Balu Balaji

Updated 14-May-13 2:23am

Johnny J.

v4

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Comments

ZurdoDev 14-May-13 8:12am

I'm confused. You said that you can use the ValueChanged event but you don't know how to tell when the value has changed? Please explain.

Balu Balaji 14-May-13 8:16am

i just want to check DateTimePicker value is changed or not?

suppose for example radiobutton.checked==true
then
do this

like this i need now what i need to do?

Basmeh Awad 14-May-13 8:19am

why are you checking it again
if (datetimepicker.ValueChanged == true)
obviously your date has changed thats why the event gets activated..directly do what you want...
strMonthCode = "JAN"; on valueChange event

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Johnny J. · Answer 1 · 2013-05-14T02:20:00

You can't use them like that. They're events - not properties. You need to add an eventhandler. Something like:

C#

public partial class Form1 : Form
{
    private bool dateChanged = false;

    private void Form1_Load(object sender, EventArgs e)
    {
        dateTimePicker1.ValueChanged += new System.EventHandler(dateTimePicker1_ValueChanged);
    }

    private void dateTimePicker1_ValueChanged(object sender, EventArgs e)
    {
        dateChanged = true;
        //Here you can do stuff that needs to be done when the value changes
    }

    private void button1_Click(object sender, EventArgs e)
    {
        //Example: Here you can check if the value has changed since you opened the form:
        if (dateChanged)
        {
            //The date has been changed - do what I need to do
        }
    }
}