Need for BindingSource.Removing event

[jehugaleahsa]

Hello:

I have a BindingSource that has its DataSource set to a
BindingList<Customerwhere Customer is a business object that
manipulates a DataRow. All changes to a Customer instance, update a
DataTable via DataRow.

It is fairly easy to add a new item to the BindingSource. However,
removing is a different story. I need to be able to know when an item
is removed because I would like to call Delete on the DataRow. I need
to be able to access the item being removed and do it there.

However, the best thing available is ListChanged, and it is pretty
useless for what I am doing. I suppose I could inherit from
BindingSource and overload the methods and add an event.

Is this the way to go? or is there something built in?

~Travis

[Nicholas Paldino [.NET/C# MVP]]

Travis,

Unfortunately, the BindingList doesn't have a ListChanging event.
Personally, I would derive a class from BindingList<Tand then override the
RemoveItem method to fire a ListChanging event, which is fired before the
item is removed from the list.

--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard.caspershouse.com

<je**********@gmail.comwrote in message
news:a4**********************************@b1g2000p ra.googlegroups.com...

Hello:

I have a BindingSource that has its DataSource set to a
BindingList<Customerwhere Customer is a business object that
manipulates a DataRow. All changes to a Customer instance, update a
DataTable via DataRow.

It is fairly easy to add a new item to the BindingSource. However,
removing is a different story. I need to be able to know when an item
is removed because I would like to call Delete on the DataRow. I need
to be able to access the item being removed and do it there.

However, the best thing available is ListChanged, and it is pretty
useless for what I am doing. I suppose I could inherit from
BindingSource and overload the methods and add an event.

Is this the way to go? or is there something built in?

~Travis

[jehugaleahsa]

On Dec 11, 12:09 pm, "Nicholas Paldino [.NET/C# MVP]"
<[e-mail]:

Travis,

Unfortunately, the BindingList doesn't have a ListChanging event.
Personally, I would derive a class from BindingList<Tand then override the
RemoveItem method to fire a ListChanging event, which is fired before the
item is removed from the list.

--
- Nicholas Paldino [.NET/C# MVP]
- [e-mail]

<[e-mail] in message

news:a4**********************************@b1g2000p ra.googlegroups.com...

Hello:

I have a BindingSource that has its DataSource set to a
BindingList<Customerwhere Customer is a business object that
manipulates a DataRow. All changes to a Customer instance, update a
DataTable via DataRow.

It is fairly easy to add a new item to the BindingSource. However,
removing is a different story. I need to be able to know when an item
is removed because I would like to call Delete on the DataRow. I need
to be able to access the item being removed and do it there.

However, the best thing available is ListChanged, and it is pretty
useless for what I am doing. I suppose I could inherit from
BindingSource and overload the methods and add an event.

Is this the way to go? or is there something built in?

~Travis- Hide quoted text -

- Show quoted text -

My thoughts exactly. Now I just have to figure out how to make
everyone aware of it.

Thanks,
Travis