Hi!

After a tip from Alex Feinman I manage to databind a datagrid to an
arraylist (thanks!). But the datagrid doesn't reflect changes in the
arraylist, unless I do the following

dg.DataSource = null;
dg.DataSource = myArrayList;

.... which doesn't seem very effective.
Is there a better way?


Regards
Peter Bladh

ArrayList does not expose the IBindingList interface which expose the Event
used to react to changes in the datasource. The only way to refresh the grid
therefore is to manually force it to update using the method described
below.

Peter

--
Peter Foot
Windows Embedded MVP
OpenNETCF.org Senior Advisor
www.inthehand.com | www.opennetcf.org

"Peter Bladh" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> Hi!
>
> After a tip from Alex Feinman I manage to databind a datagrid to an
> arraylist (thanks!). But the datagrid doesn't reflect changes in the
> arraylist, unless I do the following
>
> dg.DataSource = null;
> dg.DataSource = myArrayList;
>
> ... which doesn't seem very effective.
> Is there a better way?
>
>
> Regards
> Peter Bladh
>
>

Thank you for your answer!

Anothor disadvantage with

> > dg.DataSource = null;
> > dg.DataSource = myArrayList;

is that the datagrid won't keep the "scroll location" - if the user has
scrolled down and the datagrid gets updated it will "scroll up". That kind
of behavior will probably upset the users...
Is there a way to keep the "scroll location"?


Regards / Peter Bladh


"Peter Foot [MVP]" <(E-Mail Removed)> wrote in message
news:#(E-Mail Removed)...
> ArrayList does not expose the IBindingList interface which expose the
Event
> used to react to changes in the datasource. The only way to refresh the
grid
> therefore is to manually force it to update using the method described
> below.
>
> Peter
>
> --
> Peter Foot
> Windows Embedded MVP
> OpenNETCF.org Senior Advisor
> www.inthehand.com | www.opennetcf.org
>
> "Peter Bladh" <(E-Mail Removed)> wrote in message
> news:(E-Mail Removed)...
> > Hi!
> >
> > After a tip from Alex Feinman I manage to databind a datagrid to an
> > arraylist (thanks!). But the datagrid doesn't reflect changes in the
> > arraylist, unless I do the following
> >
> > dg.DataSource = null;
> > dg.DataSource = myArrayList;
> >
> > ... which doesn't seem very effective.
> > Is there a better way?
> >
> >
> > Regards
> > Peter Bladh
> >
> >
>
>

Something basically like the following (but I use a DataTable) works for me:

// Save the current item's ID
int oldPsId = this.GetCurrentPackingSlipId(context);
....
> dg.DataSource = null;
> dg.DataSource = myArrayList;
....
if (oldPsId != 0) {
// Find the index of the old psid in the ArrayList
i = ArrayListIndexOfID(oldPsId); // I used datatable.find here.
if (i >= 0) {
dg.CurrentRowIndex = i;
dg.Select(i);
}
}


"Peter Bladh" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> Thank you for your answer!
>
> Anothor disadvantage with
>
> > > dg.DataSource = null;
> > > dg.DataSource = myArrayList;
>
> is that the datagrid won't keep the "scroll location" - if the user has
> scrolled down and the datagrid gets updated it will "scroll up". That kind
> of behavior will probably upset the users...
> Is there a way to keep the "scroll location"?
>
>
> Regards / Peter Bladh
>
>
> "Peter Foot [MVP]" <(E-Mail Removed)> wrote in message
> news:#(E-Mail Removed)...
> > ArrayList does not expose the IBindingList interface which expose the
> Event
> > used to react to changes in the datasource. The only way to refresh the
> grid
> > therefore is to manually force it to update using the method described
> > below.
> >
> > Peter
> >
> > --
> > Peter Foot
> > Windows Embedded MVP
> > OpenNETCF.org Senior Advisor
> > www.inthehand.com | www.opennetcf.org
> >
> > "Peter Bladh" <(E-Mail Removed)> wrote in message
> > news:(E-Mail Removed)...
> > > Hi!
> > >
> > > After a tip from Alex Feinman I manage to databind a datagrid to an
> > > arraylist (thanks!). But the datagrid doesn't reflect changes in the
> > > arraylist, unless I do the following
> > >
> > > dg.DataSource = null;
> > > dg.DataSource = myArrayList;
> > >
> > > ... which doesn't seem very effective.
> > > Is there a better way?
> > >
> > >
> > > Regards
> > > Peter Bladh
> > >
> > >
> >
> >
>
>

In another sample I show how to scroll the datagrid into a particular
position: http://www.alexfeinman.com/dowload.a...ScrollGrid.zip

HTH'
Alex

Peter Bladh wrote:
> Thank you for your answer!
>
> Anothor disadvantage with
>
>
>>>dg.DataSource = null;
>>>dg.DataSource = myArrayList;
>
>
> is that the datagrid won't keep the "scroll location" - if the user has
> scrolled down and the datagrid gets updated it will "scroll up". That kind
> of behavior will probably upset the users...
> Is there a way to keep the "scroll location"?
>
>
> Regards / Peter Bladh
>
>
> "Peter Foot [MVP]" <(E-Mail Removed)> wrote in message
> news:#(E-Mail Removed)...
>
>>ArrayList does not expose the IBindingList interface which expose the
>
> Event
>
>>used to react to changes in the datasource. The only way to refresh the
>
> grid
>
>>therefore is to manually force it to update using the method described
>>below.
>>
>>Peter
>>
>>--
>>Peter Foot
>>Windows Embedded MVP
>>OpenNETCF.org Senior Advisor
>>www.inthehand.com | www.opennetcf.org
>>
>>"Peter Bladh" <(E-Mail Removed)> wrote in message
>>news:(E-Mail Removed)...
>>
>>>Hi!
>>>
>>>After a tip from Alex Feinman I manage to databind a datagrid to an
>>>arraylist (thanks!). But the datagrid doesn't reflect changes in the
>>>arraylist, unless I do the following
>>>
>>>dg.DataSource = null;
>>>dg.DataSource = myArrayList;
>>>
>>>... which doesn't seem very effective.
>>>Is there a better way?
>>>
>>>
>>>Regards
>>>Peter Bladh
>>>
>>>
>>
>>
>
>