Datagrid DateTimepicker column style

[Karl]

Hi, .Net experts,

I am using DatagridDateTim epickerColumn style posted on MSDN .net class
document in my datagrid. You can see the datagridDateTim epickerColumn style
at

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/html/frlrfsystemwindowsformsdatagridcolumnstyleclasstopic.asp

It works fine with the datetimepicker column of current record in datagrid.
But when I click the very last record in datagrid (which creates a record), I
got an exception. I debuged it. It occured right after leaving Edit
function. Can somebody tell me the reasion and how to fix it?

Thanks,

Karl

[Claudio Grazioli]

Re: Datagrid DateTimepicker column style

Hi Karl
[color=blue]
> I am using DatagridDateTim epickerColumn style posted on MSDN .net class
> document in my datagrid. You can see the datagridDateTim epickerColumn style
> at:
> http://msdn.microsoft.com/library/de...classtopic.asp
>
> It works fine with the datetimepicker column of current record in datagrid.
> But when I click the very last record in datagrid (which creates a record), I
> got an exception. I debuged it. It occured right after leaving Edit
> function. Can somebody tell me the reasion and how to fix it?[/color]

The standard DateTimePicker control from .NET does not support null values.
Its value property must always be a valid DateTime value.

When you click on the last line in the datagrid and thus create a new
record, what happens with your DateTime value? Is it set to DateTime.Now?
Or is it initalized with null? If the latter, you would try to set the
DateTimePickers value property to null and that would raise an exception.

If that is the problem you should use a DateTimePicker control that
supports null values like this one:

http://www.codeproject.com/cs/miscctrl/NullableDateTimePicker.asp

hth
--
Claudio Grazioli

http://www.grazioli.ch

http://www.grazioli.ch/HommingbergerGepardenforelle/