Copy Listview to Listview

[CaffeineRush]

I have two Listview controls on the stage:
lv_Files
lv_SelectedFile s

I have a function that copies the selected items from lv_Files to
lv_SelectedFile s.
I am currently using a loop on the selected indices to copy. This is quite a
slow process when there are a lot of entries selected in lv_Files.

There is also a Copy All button that first selects all indices, then loops
through lv_Files, individually copying to lv_SelectedFile s.

Is there a method to perform this copy without the loop? Some faster
implementation? I have not been able to find any documention or code
examples for such.

[Angel J. Hernández]

Hi there... try this

object[] dest = new object[listBox1.Items. Count];
listBox1.Items. CopyTo(dest, 0);
listBox2.Items. AddRange(dest);

Regards,
--
Angel J. Hernández M.
MCSD

"CaffeineRu sh" <gr******@swbel l.net> escribió en el mensaje
news:3G******** *********@newss vr22.news.prodi gy.com...

I have two Listview controls on the stage:
lv_Files
lv_SelectedFile s

I have a function that copies the selected items from lv_Files to
lv_SelectedFile s.
I am currently using a loop on the selected indices to copy. This is quite a slow process when there are a lot of entries selected in lv_Files.

There is also a Copy All button that first selects all indices, then loops
through lv_Files, individually copying to lv_SelectedFile s.

Is there a method to perform this copy without the loop? Some faster
implementation? I have not been able to find any documention or code
examples for such.

[CaffeineRush]

I got the following to compile:

ListViewItem[] dest = new ListViewItem[lv_Files.Items. Count];
// object[] dest = new object[lv_Files.Items. Count];
lv_Files.Items. CopyTo(dest, 0);
lv_SelectedFile s.Items.AddRang e(dest);

but get the following System.Argument Exception error in system.windows. forms.dll:

Additional information: Cannot add or insert the item 'filename.jpg' in more than one place. You must first remove it from its current location or clone it.

Any ideas? Thanks!

"Angel J. Hernández" <an**********@h otmail.com> wrote in message news:u5******** ******@tk2msftn gp13.phx.gbl...

Hi there... try this

object[] dest = new object[listBox1.Items. Count];
listBox1.Items. CopyTo(dest, 0);
listBox2.Items. AddRange(dest);

Regards,


--
Angel J. Hernández M.
MCSD



"CaffeineRu sh" <gr******@swbel l.net> escribió en el mensaje
news:3G******** *********@newss vr22.news.prodi gy.com...

I have two Listview controls on the stage:
lv_Files
lv_SelectedFile s

I have a function that copies the selected items from lv_Files to
lv_SelectedFile s.
I am currently using a loop on the selected indices to copy. This is quite

a

slow process when there are a lot of entries selected in lv_Files.

There is also a Copy All button that first selects all indices, then loops
through lv_Files, individually copying to lv_SelectedFile s.

Is there a method to perform this copy without the loop? Some faster
implementation? I have not been able to find any documention or code
examples for such.

[Marcin Grzębski]

Hi,

I believe that "listBox2.Items .AddRange(...)" is key for
your performance goal.

And i think that loop (with "Clone()" of items) over your
"listBox1.Selec tedItems" should be solution.

Cheers!

Marcin

I got the following to compile:

ListViewItem[] dest = new ListViewItem[lv_Files.Items. Count];
// object[] dest = new object[lv_Files.Items. Count];
lv_Files.Items. CopyTo(dest, 0);
lv_SelectedFile s.Items.AddRang e(dest);

but get the following System.Argument Exception error in
system.windows. forms.dll:

Additional information: Cannot add or insert the item 'filename.jpg' in
more than one place. You must first remove it from its current location
or clone it.

Any ideas? Thanks!

"Angel J. Hernández" <an**********@h otmail.com
<mailto:an***** *****@hotmail.c om>> wrote in message
news:u5******** ******@tk2msftn gp13.phx.gbl...

> Hi there... try this
>
> object[] dest = new object[listBox1.Items. Count];
> listBox1.Items. CopyTo(dest, 0);
> listBox2.Items. AddRange(dest);
>
> Regards,
>
>
> --
> Angel J. Hernández M.
> MCSD
>
>
>
> "CaffeineRu sh" <gr******@swbel l.net <mailto:gr***** *@swbell.net>>

escribió en el mensaje

> news:3G******** *********@newss vr22.news.prodi gy.com...

> > I have two Listview controls on the stage:
> > lv_Files
> > lv_SelectedFile s
> >
> > I have a function that copies the selected items from lv_Files to
> > lv_SelectedFile s.
> > I am currently using a loop on the selected indices to copy. This is quite

> a

> > slow process when there are a lot of entries selected in lv_Files.
> >
> > There is also a Copy All button that first selects all indices,

then loops > > through lv_Files, individually copying to lv_SelectedFile s.
> >
> > Is there a method to perform this copy without the loop? Some faster
> > implementation? I have not been able to find any documention or code
> > examples for such.
> >
> >

>
>