public override string GetDisplayText(FormatInfo format, object editValue)
{
var displayText = string.Empty;
var period = editValue as PeriodsSet;
if (period != null)
{
displayText = period.ToString(format.FormatString, SeparatorChar);
}
else
{
var s = editValue as string;
if (s != null)
{
displayText = PeriodsSet.Parse(s).ToString(format.FormatString, SeparatorChar);
}
}
var e = new CustomDisplayTextEventArgs(editValue, displayText);
if (format != EditFormat)
{
RaiseCustomDisplayText(e);
}
return(e.DisplayText);
}
protected override bool IsNullValue(object editValue)
{
var value = editValue as PeriodsSet;
if (value != null)
{
return(value.Periods.Count == 0);
}
var s = editValue as string;
if (s == null)
{
return(false);
}
return(PeriodsSet.Parse(s).Periods.Count == 0);
}
