CODEWITHSUNDEEP
c#.net
Pleats
Pleats

Reputation: 59

Detecting time change in DateTimePicker

I have WPF application that holds some buttons. One button is named ChangeTime so when clicked, dialog opens and there is hh/mm/ss what you can change. I want to store picked time in variable.

My problem is that I only want store that new time if user really changed time. Currently when user presses button, event triggers and new value is stored. Also it shouldn't store new value when dialog is closed without touching Time field.

Essentially I want to change BtnWasClicked to true when time is actually changed. Poor choice of variable name indeed.

Any way to prevent it?

private DateTimePicker _timePortionDateTimePicker;
private DateTime _pickedTime;
private bool btnWasClicked = false;
private bool timeChanged = false;

private void TimeIsChanged(object sender, EventArgs e)
{
  timeChanged = true;
  if (timeChanged)
  {
    btnWasClicked = true;
  }
}

private void BtnChangeTime_OnClick(object sender, EventArgs e)
{
  Form timeDialog = new Form();

  _timePortionDateTimePicker = new DateTimePicker();
  _timePortionDateTimePicker.Format = DateTimePickerFormat.Time;
  _timePortionDateTimePicker.ShowUpDown = true;
  _timePortionDateTimePicker.ValueChanged += new 
                                             EventHandler(TimeIsChanged);

  timeDialog.Controls.Add(_timePortionDateTimePicker);
  timeDialog.ShowDialog();

  _pickedTime = _timePortionDateTimePicker.Value;
}

Upvotes: 1

Views: 90

Answers (1)

Sweeper
Sweeper

Reputation: 274835

You don't actually need TimeIsChanged. You can just check whether _timePortionDateTimePicker.Value is different from _pickedTime in BtnChangeTime_OnClick.

  Form timeDialog = new Form();

  _timePortionDateTimePicker = new DateTimePicker();
  _timePortionDateTimePicker.Format = DateTimePickerFormat.Time;
  _timePortionDateTimePicker.ShowUpDown = true;
  // start with the previous chosen time
  _timePortionDateTimePicker.Value = _pickedTime;

  timeDialog.Controls.Add(_timePortionDateTimePicker);
  timeDialog.ShowDialog();

  if (_pickedTime != _timePortionDateTimePicker.Value) {
      // time has changed, assign to _pickedTime and other variables
      _pickedTime != _timePortionDateTimePicker.Value;
      timeChanged = true;
      btnWasClicked = true;
  } // otherwise do nothing

Upvotes: 1

Related Questions