/// <summary>
/// Input text is parsed in the correct format and changed into a
/// DateTime object. If the text can not be parsed TextParseError Event
/// is thrown.
/// </summary>
/// <param name="text">Inherited code: Requires comment.</param>
/// <returns>
/// IT SHOULD RETURN NULL IF THE STRING IS NOT VALID, RETURN THE
/// DATETIME VALUE IF IT IS VALID.
/// </returns>
private DateTime?ParseText(string text)
{
DateTime newSelectedDate;
// TryParse is not used in order to be able to pass the exception to
// the TextParseError event
try
{
newSelectedDate = DateTime.Parse(text, DateTimeHelper.GetCurrentDateFormat());
if (Calendar.IsValidDateSelection(this._calendar, newSelectedDate))
{
return(newSelectedDate);
}
else
{
var dateValidationError = new DatePickerDateValidationErrorEventArgs(new ArgumentOutOfRangeException("text", "SelectedDate value is not valid."), text);
OnDateValidationError(dateValidationError);
if (dateValidationError.ThrowException)
{
throw dateValidationError.Exception;
}
}
}
catch (FormatException ex)
{
DatePickerDateValidationErrorEventArgs textParseError = new DatePickerDateValidationErrorEventArgs(ex, text);
OnDateValidationError(textParseError);
if (textParseError.ThrowException)
{
throw textParseError.Exception;
}
}
return(null);
}
/// <summary>
/// Raises the
/// <see cref="E:Avalonia.Controls.DatePicker.DateValidationError" />
/// event.
/// </summary>
/// <param name="e">
/// A
/// <see cref="T:Avalonia.Controls.DatePickerDateValidationErrorEventArgs" />
/// that contains the event data.
/// </param>
protected virtual void OnDateValidationError(DatePickerDateValidationErrorEventArgs e)
{
DateValidationError?.Invoke(this, e);
}