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From: Amrit on 3 Dec 2009 02:58
HI All

Is there any way to find subitem in ListView with out using loop

Tahkns
Amrit


From: Nobody on 3 Dec 2009 03:30
"Amrit" <cadd(a)wlink.com.np> wrote in message
news:un0Vf5%23cKHA.5796(a)TK2MSFTNGP06.phx.gbl...
> HI All
>
> Is there any way to find subitem in ListView with out using loop

If you used "Key" parameter when adding items, you could use it to find
items quickly, but it's not easy to make it work for multiple columns.
Example: ListView1.ListItems("Item123"). Collections in VB use an efficient
method of searching by using hash tables, so finding items this way is fast,
adding them is slow because the Collection does some indexing to make
retrieval faster.

Another option is using a virtual ListView. In this case, the items are not
stored in the ListView, and it only show one screen-full at a time. This
makes it super fast. You can store your data in an array of UDT, and if you
want to find an item, just search your array. For a VB6 sample, search this
page for "Virtual ListView Demo.zip (19KB)".

http://www.mvps.org/vbvision/Sample_Projects.htm#CustomDrawLV_Demo

There is a different sample with similar name, "Virtual Listbox Demo.zip
(34KB)". This is not the same sample.


From: Dave O. on 3 Dec 2009 06:25

"Amrit" <cadd(a)wlink.com.np> wrote in message
news:un0Vf5%23cKHA.5796(a)TK2MSFTNGP06.phx.gbl...
> HI All
>
> Is there any way to find subitem in ListView with out using loop
>
> Tahkns
> Amrit

Have a look at the messages: LVM_FINDITEMA & LVM_FINDITEMW
http://msdn.microsoft.com/en-us/library/bb774903(VS.85).aspx

It's not one I've used myself but it does not look too tricky, first fill a
LVFINDINFO (http://msdn.microsoft.com/en-us/library/bb774745(VS.85).aspx)
structure, then send the message with SendMessage. It should either return
the index of the containing listitem or -1 if no match is found.

BTW it's really quite easy to find these, I keep a copy of COMMCTRL.H and I
just glance through the values starting with LVM_ (List View Message) until
I find one that sounds like it might do what's needed, then use Google to
find the documentation at MSDN and read that then either have a go or return
to Google to hunt down some examples. The same principle obviously applies
to all intrinsic controls although you'll need the correct header file for
other controls (WINUSER.H has a lot).

You'll notice that many messages that deal with strings have "A" and "W"
versions, basically the W (wide) one is for unicode.

Regards
Dave O.


From: Amrit on 3 Dec 2009 11:28
Hi Dave

Thanks you both for Respond.



Well, I don't know much about winapi. is that possible to tell me where can
i get example for LVM_FINDITEMA & LVM_FINDITEMW


for VB. and how to apply it.

I search in Google. But result is not good for me.

I really appreciate your input. Thanks.

Thanks for help.

Amrit



"Dave O." <nobody(a)nowhere.com> wrote in message
news:ezTdLtAdKHA.4880(a)TK2MSFTNGP05.phx.gbl...
>
> "Amrit" <cadd(a)wlink.com.np> wrote in message
> news:un0Vf5%23cKHA.5796(a)TK2MSFTNGP06.phx.gbl...
>> HI All
>>
>> Is there any way to find subitem in ListView with out using loop
>>
>> Tahkns
>> Amrit
>
> Have a look at the messages: LVM_FINDITEMA & LVM_FINDITEMW
> http://msdn.microsoft.com/en-us/library/bb774903(VS.85).aspx
>
> It's not one I've used myself but it does not look too tricky, first fill
> a LVFINDINFO
> (http://msdn.microsoft.com/en-us/library/bb774745(VS.85).aspx) structure,
> then send the message with SendMessage. It should either return the index
> of the containing listitem or -1 if no match is found.
>
> BTW it's really quite easy to find these, I keep a copy of COMMCTRL.H and
> I just glance through the values starting with LVM_ (List View Message)
> until I find one that sounds like it might do what's needed, then use
> Google to find the documentation at MSDN and read that then either have a
> go or return to Google to hunt down some examples. The same principle
> obviously applies to all intrinsic controls although you'll need the
> correct header file for other controls (WINUSER.H has a lot).
>
> You'll notice that many messages that deal with strings have "A" and "W"
> versions, basically the W (wide) one is for unicode.
>
> Regards
> Dave O.
>
>


From: Dave O. on 3 Dec 2009 11:44
Well I used Google with this:
LVM_FINDITEM VB -net
and got loads of hits, granted most were junk but this one:
http://forums.devx.com/archive/index.php/t-153973.html
had something useful about half way down the page

Incidentally, have you tried the ListView built in FindItem command?
If you don't want to read a ListView in a different application then the
native command should be adequate.

Regards
Dave O.

"Amrit" <cadd(a)wlink.com.np> wrote in message
news:%23RxxsWDdKHA.2188(a)TK2MSFTNGP04.phx.gbl...
> Hi Dave
>
> Thanks you both for Respond.
>
>
>
> Well, I don't know much about winapi. is that possible to tell me where
> can i get example for LVM_FINDITEMA & LVM_FINDITEMW
>
>
> for VB. and how to apply it.
>
> I search in Google. But result is not good for me.
>
> I really appreciate your input. Thanks.
>
> Thanks for help.
>
> Amrit
>
>
>
> "Dave O." <nobody(a)nowhere.com> wrote in message
> news:ezTdLtAdKHA.4880(a)TK2MSFTNGP05.phx.gbl...
>>
>> "Amrit" <cadd(a)wlink.com.np> wrote in message
>> news:un0Vf5%23cKHA.5796(a)TK2MSFTNGP06.phx.gbl...
>>> HI All
>>>
>>> Is there any way to find subitem in ListView with out using loop
>>>
>>> Tahkns
>>> Amrit
>>
>> Have a look at the messages: LVM_FINDITEMA & LVM_FINDITEMW
>> http://msdn.microsoft.com/en-us/library/bb774903(VS.85).aspx
>>
>> It's not one I've used myself but it does not look too tricky, first fill
>> a LVFINDINFO
>> (http://msdn.microsoft.com/en-us/library/bb774745(VS.85).aspx) structure,
>> then send the message with SendMessage. It should either return the index
>> of the containing listitem or -1 if no match is found.
>>
>> BTW it's really quite easy to find these, I keep a copy of COMMCTRL.H and
>> I just glance through the values starting with LVM_ (List View Message)
>> until I find one that sounds like it might do what's needed, then use
>> Google to find the documentation at MSDN and read that then either have a
>> go or return to Google to hunt down some examples. The same principle
>> obviously applies to all intrinsic controls although you'll need the
>> correct header file for other controls (WINUSER.H has a lot).
>>
>> You'll notice that many messages that deal with strings have "A" and "W"
>> versions, basically the W (wide) one is for unicode.
>>
>> Regards
>> Dave O.
>>
>>
>
>


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