自定义Datetimepicker，将允许启用/禁用某些日期

Question

I need to develop a custom DateTimePicker that will allow me to enable/disable certain dates from the calendar for allowing/disallowing user to select them.

Can anyone help?

Answer 1

You can set blackdays in the DatePicker, maybe that helps.

See documentation DatePicker.BlackoutDates

Answer 2

You can handle the ValueChanged event to handle manually your date validation. See MSDN doc .

Something like this will to the trick:

private void DateTimePicker_ValueChanged(Object sender, EventArgs e) 
{
    var selectedDate = this.DateTimePicker.Value;
    if (this.DateIsForbidden(selectedDate))
    {
        var forcedDate = this.GetAllowedDate(selectedDate);
        this.DateTimePicker.Value = forcedDate;
        MessageBox.Show(string.Format("Date {0} is not allowed. {1} selected instead", selectedDate, forcedDate));
    }
}