Datagrid : IBindingList question

[Matthew Woods]

bool A = Is this the right place to ask this question?

if (A)
{
Where can i find a good example of an ArrayList bound to a datagrid that
automatically updates the grid when the public data within the class
contained in the arraylist is updated. i do not want to use
datagrid.refres h() because the data updates randomly and often frequently
and refreshing the whole grid several times a second is expensive and causes
a flicker.
}
else
{
please redirect me to the appropriate newsgroup.
}

thanks
Matt

[Pete Davis]

ArrayList does not implement IBindingList which is why it doesn't update the
grid.

The best solution is to create your own IBindingList implementation.

The only framework classes that I know of that implement IBindingList are
DataView and DataViewManager .

Pete
"Matthew Woods" <mw****@bearwag ner.com> wrote in message
news:uG******** *****@TK2MSFTNG P10.phx.gbl...

bool A = Is this the right place to ask this question?

if (A)
{
Where can i find a good example of an ArrayList bound to a datagrid
that
automatically updates the grid when the public data within the class
contained in the arraylist is updated. i do not want to use
datagrid.refres h() because the data updates randomly and often frequently
and refreshing the whole grid several times a second is expensive and
causes
a flicker.
}
else
{
please redirect me to the appropriate newsgroup.
}

thanks
Matt

[Matthew Woods]

Thanks,

So is there any way to automatically update a datagrid bound to an
arraylist?

Matt

"Pete Davis" <pdavis68@[nospam]hotmail.com> wrote in message
news:1N******** *************** *******@giganew s.com...

ArrayList does not implement IBindingList which is why it doesn't update the grid.

The best solution is to create your own IBindingList implementation.

The only framework classes that I know of that implement IBindingList are
DataView and DataViewManager .

Pete
"Matthew Woods" <mw****@bearwag ner.com> wrote in message
news:uG******** *****@TK2MSFTNG P10.phx.gbl...

bool A = Is this the right place to ask this question?

if (A)
{
Where can i find a good example of an ArrayList bound to a datagrid
that
automatically updates the grid when the public data within the class
contained in the arraylist is updated. i do not want to use
datagrid.refres h() because the data updates randomly and often frequently and refreshing the whole grid several times a second is expensive and
causes
a flicker.
}
else
{
please redirect me to the appropriate newsgroup.
}

thanks
Matt

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

No, there is not. However, you can create a regular wrapper which takes
an ArrayList which implements IBindingList. It wouldn't be too hard.

Also, if you are using .NET 2.0, check out the BindingList<T> class, as
it implements IBindingList, and will give you what you want.

Hope this helps.
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard. caspershouse.co m

"Matthew Woods" <mw****@bearwag ner.com> wrote in message
news:OM******** *****@TK2MSFTNG P15.phx.gbl...

Thanks,

So is there any way to automatically update a datagrid bound to an
arraylist?

Matt

"Pete Davis" <pdavis68@[nospam]hotmail.com> wrote in message
news:1N******** *************** *******@giganew s.com...

ArrayList does not implement IBindingList which is why it doesn't update

the

grid.

The best solution is to create your own IBindingList implementation.

The only framework classes that I know of that implement IBindingList are
DataView and DataViewManager .

Pete
"Matthew Woods" <mw****@bearwag ner.com> wrote in message
news:uG******** *****@TK2MSFTNG P10.phx.gbl...

> bool A = Is this the right place to ask this question?
>
> if (A)
> {
> Where can i find a good example of an ArrayList bound to a datagrid
> that
> automatically updates the grid when the public data within the class
> contained in the arraylist is updated. i do not want to use
> datagrid.refres h() because the data updates randomly and often frequently > and refreshing the whole grid several times a second is expensive and
> causes
> a flicker.
> }
> else
> {
> please redirect me to the appropriate newsgroup.
> }
>
> thanks
> Matt
>
>

[Pete Davis]

I think you call Refresh() in the CurrencyManager . I'm pretty sure that will
work.

Just do:

(BindingContext[grid.DataSource , grid.DataMember] as
CurrencyManager ).Refresh();

Pete

"Matthew Woods" <mw****@bearwag ner.com> wrote in message
news:OM******** *****@TK2MSFTNG P15.phx.gbl...

Thanks,

So is there any way to automatically update a datagrid bound to an
arraylist?

Matt

"Pete Davis" <pdavis68@[nospam]hotmail.com> wrote in message
news:1N******** *************** *******@giganew s.com...

ArrayList does not implement IBindingList which is why it doesn't update

the

grid.

The best solution is to create your own IBindingList implementation.

The only framework classes that I know of that implement IBindingList are
DataView and DataViewManager .

Pete
"Matthew Woods" <mw****@bearwag ner.com> wrote in message
news:uG******** *****@TK2MSFTNG P10.phx.gbl...

> bool A = Is this the right place to ask this question?
>
> if (A)
> {
> Where can i find a good example of an ArrayList bound to a datagrid
> that
> automatically updates the grid when the public data within the class
> contained in the arraylist is updated. i do not want to use
> datagrid.refres h() because the data updates randomly and often frequently > and refreshing the whole grid several times a second is expensive and
> causes
> a flicker.
> }
> else
> {
> please redirect me to the appropriate newsgroup.
> }
>
> thanks
> Matt
>
>

[Pete Davis]

Calling CurrencyManager .Refresh() will cause it to resync with the
datasource, allowing it to pick up the changes. There are problems with
this, and I agree, wrapping ArrayList and implementing IBindingList is far
preferable.

Pete

"Nicholas Paldino [.NET/C# MVP]" <mv*@spam.guard .caspershouse.c om> wrote in
message news:Oc******** ******@tk2msftn gp13.phx.gbl...

No, there is not. However, you can create a regular wrapper which
takes an ArrayList which implements IBindingList. It wouldn't be too
hard.

Also, if you are using .NET 2.0, check out the BindingList<T> class, as
it implements IBindingList, and will give you what you want.

Hope this helps.
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard. caspershouse.co m

"Matthew Woods" <mw****@bearwag ner.com> wrote in message
news:OM******** *****@TK2MSFTNG P15.phx.gbl...

Thanks,

So is there any way to automatically update a datagrid bound to an
arraylist?

Matt

"Pete Davis" <pdavis68@[nospam]hotmail.com> wrote in message
news:1N******** *************** *******@giganew s.com...

ArrayList does not implement IBindingList which is why it doesn't update

the

grid.

The best solution is to create your own IBindingList implementation.

The only framework classes that I know of that implement IBindingList
are
DataView and DataViewManager .

Pete
"Matthew Woods" <mw****@bearwag ner.com> wrote in message
news:uG******** *****@TK2MSFTNG P10.phx.gbl...
> bool A = Is this the right place to ask this question?
>
> if (A)
> {
> Where can i find a good example of an ArrayList bound to a datagrid
> that
> automatically updates the grid when the public data within the class
> contained in the arraylist is updated. i do not want to use
> datagrid.refres h() because the data updates randomly and often

frequently

> and refreshing the whole grid several times a second is expensive and
> causes
> a flicker.
> }
> else
> {
> please redirect me to the appropriate newsgroup.
> }
>
> thanks
> Matt
>
>