Nested objects and INotifyProperty Changed

[Betina]

Hi,

I've created a Person-Object which implemts INotifyProperty Changed. This
Person-Object contains an Address-Object which implements
INotifyProperty Changed too.

Then I create a BindingList<Per son> which is the DataSource for my
BindingSource. I created some TextBoxes bound to this BindingSource like this:

Binding b = new Binding("Text", bindingSource, "Name");
Binding b = new Binding("Text", bindingSource, "Address.Street ");

Updating the Name-Property works fine and I get a ListChanged-Event but when
I update the Street-Property I never get a ListChanged-Event.

What am I doing wrong?
Betina

[Mark R. Dawson]

Hi Betina,
the problem you are having is because you are databinding to the Person
object, because you have a list of peolpe at the underlying datasource. What
you need to do is make sure that when the Address object raises the
PRopertyChanged event that the Person class that contains the event captures
the event and also raises a PropertyChanged event, then both the person and
addres controls should update.

Hope that helps
Mark Dawson
http://www.markdawson.org
"Betina" wrote:

Hi,

I've created a Person-Object which implemts INotifyProperty Changed. This
Person-Object contains an Address-Object which implements
INotifyProperty Changed too.

Then I create a BindingList<Per son> which is the DataSource for my
BindingSource. I created some TextBoxes bound to this BindingSource like this:

Binding b = new Binding("Text", bindingSource, "Name");
Binding b = new Binding("Text", bindingSource, "Address.Street ");

Updating the Name-Property works fine and I get a ListChanged-Event but when
I update the Street-Property I never get a ListChanged-Event.

What am I doing wrong?
Betina

[Betina]

Hi Mark,

is this the only way to make it work? I load the private member of the
objects through reflection and there's no easy way to capture events.

Is there any possibilty to capture this events in the bindinglist? I'm
working with a derived class and I think changing this class would be a more
general solution.
Thanks for your answer.
Betina

"Mark R. Dawson" wrote:

Hi Betina,
the problem you are having is because you are databinding to the Person
object, because you have a list of peolpe at the underlying datasource. What
you need to do is make sure that when the Address object raises the
PRopertyChanged event that the Person class that contains the event captures
the event and also raises a PropertyChanged event, then both the person and
addres controls should update.

Hope that helps
Mark Dawson
http://www.markdawson.org
"Betina" wrote:

Hi,

I've created a Person-Object which implemts INotifyProperty Changed. This
Person-Object contains an Address-Object which implements
INotifyProperty Changed too.

Then I create a BindingList<Per son> which is the DataSource for my
BindingSource. I created some TextBoxes bound to this BindingSource like this:

Binding b = new Binding("Text", bindingSource, "Name");
Binding b = new Binding("Text", bindingSource, "Address.Street ");

Updating the Name-Property works fine and I get a ListChanged-Event but when
I update the Street-Property I never get a ListChanged-Event.

What am I doing wrong?
Betina

[Mark R. Dawson]

Hi Betina,
I am not sure I am exactly following you, if you can do the folowing:

Then I create a BindingList<Per son> which is the DataSource for my
BindingSource. I created some TextBoxes bound to this BindingSource like this:

Binding b = new Binding("Text", bindingSource, "Name");
Binding b = new Binding("Text", bindingSource, "Address.Street ");

Then you must have access to the bindingsource and the list of people so you
can write some code like:

foreach(Person p in people)
{
// wire up p.Address.Prope rtyChanged to some event handler in P
}

Do you not have access to these things?
--
http://www.markdawson.org
"Betina" wrote:
Hi Mark,

is this the only way to make it work? I load the private member of the
objects through reflection and there's no easy way to capture events.

Is there any possibilty to capture this events in the bindinglist? I'm
working with a derived class and I think changing this class would be a more
general solution.
Thanks for your answer.
Betina

"Mark R. Dawson" wrote:

Hi Betina,
the problem you are having is because you are databinding to the Person
object, because you have a list of peolpe at the underlying datasource. What
you need to do is make sure that when the Address object raises the
PRopertyChanged event that the Person class that contains the event captures
the event and also raises a PropertyChanged event, then both the person and
addres controls should update.

Hope that helps
Mark Dawson
http://www.markdawson.org
"Betina" wrote:

Hi,

I've created a Person-Object which implemts INotifyProperty Changed. This
Person-Object contains an Address-Object which implements
INotifyProperty Changed too.

Then I create a BindingList<Per son> which is the DataSource for my
BindingSource. I created some TextBoxes bound to this BindingSource like this:

Binding b = new Binding("Text", bindingSource, "Name");
Binding b = new Binding("Text", bindingSource, "Address.Street ");

Updating the Name-Property works fine and I get a ListChanged-Event but when
I update the Street-Property I never get a ListChanged-Event.

What am I doing wrong?
Betina

[Betina]

Hi Mark,

yes, I have access to these things and I think it should be possible. I read
about the IRaiseItemChang edEvents and I will give it a try.

Thank you.

Betina

"Mark R. Dawson" wrote:

Hi Betina,
I am not sure I am exactly following you, if you can do the folowing:

> Then I create a BindingList<Per son> which is the DataSource for my
> BindingSource. I created some TextBoxes bound to this BindingSource like this:
>
> Binding b = new Binding("Text", bindingSource, "Name");
> Binding b = new Binding("Text", bindingSource, "Address.Street ");

Then you must have access to the bindingsource and the list of people so you
can write some code like:

foreach(Person p in people)
{
// wire up p.Address.Prope rtyChanged to some event handler in P
}

Do you not have access to these things?
--
http://www.markdawson.org
"Betina" wrote:

Hi Mark,

is this the only way to make it work? I load the private member of the
objects through reflection and there's no easy way to capture events.

Is there any possibilty to capture this events in the bindinglist? I'm
working with a derived class and I think changing this class would be a more
general solution.
Thanks for your answer.
Betina

"Mark R. Dawson" wrote:

Hi Betina,
the problem you are having is because you are databinding to the Person
object, because you have a list of peolpe at the underlying datasource. What
you need to do is make sure that when the Address object raises the
PRopertyChanged event that the Person class that contains the event captures
the event and also raises a PropertyChanged event, then both the person and
addres controls should update.

Hope that helps
Mark Dawson
http://www.markdawson.org
"Betina" wrote:

> Hi,
>
> I've created a Person-Object which implemts INotifyProperty Changed. This
> Person-Object contains an Address-Object which implements
> INotifyProperty Changed too.
>
> Then I create a BindingList<Per son> which is the DataSource for my
> BindingSource. I created some TextBoxes bound to this BindingSource like this:
>
> Binding b = new Binding("Text", bindingSource, "Name");
> Binding b = new Binding("Text", bindingSource, "Address.Street ");
>
> Updating the Name-Property works fine and I get a ListChanged-Event but when
> I update the Street-Property I never get a ListChanged-Event.
>
> What am I doing wrong?
>
>
> Betina
>
>