Does anyone know how I can determine how many visible rows there are in
a vb.net Listview? There is no listview "visible row count" property
like there is for a datagrid.
Tks in advance for any feedback.
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try listview.items. count
tony
"Henry" <an*******@devd ex.com> wrote in message
news:uI******** ********@TK2MSF TNGP11.phx.gbl. ..
Does anyone know how I can determine how many visible rows there are in
a vb.net Listview? There is no listview "visible row count" property
like there is for a datagrid.
Tks in advance for any feedback.
*** Sent via Developersdex http://www.developersdex.com ***
Don't just participate in USENET...get rewarded for it!
* "t perkins" <tp******@roger sandhollands.co m> scripsit: try listview.items. count
This will return the total number of items.
--
Herfried K. Wagner [MVP]
<http://www.mvps.org/dotnet>
I was aware of the listview "item count" propery to obtain the total
number of items.
However, what I need to figure out is how may rows in the listview
display area are advanced or vice versa when the user presses the "page
down" or the "page up " keys. I will take the number and then
increment/decrement my record position/counter that I display for the
user.
Any other ideas?
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You could probably use the Control.ClientS ize Property in conjunction with
the protected property Control.FontHei ght and do some fun mathmatics there
(not really diffucult.
RowsVisible = Control.ClientS ize.Height / Control.FontHei ght
I would round it and you should have a good idea of how much space is being
used... I think you can get the height of the columns as well for good
measure...
"Henry" <an*******@devd ex.com> wrote in message
news:uI******** ********@TK2MSF TNGP11.phx.gbl. ..
Does anyone know how I can determine how many visible rows there are in
a vb.net Listview? There is no listview "visible row count" property
like there is for a datagrid.
Tks in advance for any feedback.
*** Sent via Developersdex http://www.developersdex.com ***
Don't just participate in USENET...get rewarded for it!
Also noted.. You can use Control.CreateG raphics method and use embedded
methods in that such as MEasureString I suppose...
And add padding as neede.d
-CJ
"CJ Taylor" <no****@blowgoa ts.com> wrote in message
news:10******** *****@corp.supe rnews.com... You could probably use the Control.ClientS ize Property in conjunction with
the protected property Control.FontHei ght and do some fun mathmatics there
(not really diffucult.
RowsVisible = Control.ClientS ize.Height / Control.FontHei ght
I would round it and you should have a good idea of how much space is
being used... I think you can get the height of the columns as well for good
measure...
"Henry" <an*******@devd ex.com> wrote in message
news:uI******** ********@TK2MSF TNGP11.phx.gbl. ..
Does anyone know how I can determine how many visible rows there are in
a vb.net Listview? There is no listview "visible row count" property
like there is for a datagrid.
Tks in advance for any feedback.
*** Sent via Developersdex http://www.developersdex.com ***
Don't just participate in USENET...get rewarded for it!
Tks for the suggestion. I'll work the idea and see what I can come up
with.
In the mean time any other suggestions would also be welcomed.
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For anyone who is interested below is a solution:
Dim lvCount
lvCount = ListView_GetVis ibleCount(ListV iew1.Handle)
Private Const LVM_FIRST = &H1000
Private Const LVM_GETCOUNTPER PAGE As Long = (LVM_FIRST + 40)
Private Declare Function SendMessage Lib "user32" Alias "SendMessag eA"
(ByVal hwnd As IntPtr, ByVal wMsg As Long, ByVal wParam As Long, ByVal
lParam As Long) As Long
Private Function ListView_GetVis ibleCount(ByVal hwndlv As IntPtr) As
Long
ListView_GetVis ibleCount = SendMessage(hwn dlv,LVM_GETCOUN TPERPAGE, 0&,
0&)
End Function
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Ahh... Trusty ol' Win32 API....
"Henry" <an*******@devd ex.com> wrote in message
news:Oh******** ********@TK2MSF TNGP09.phx.gbl. .. For anyone who is interested below is a solution:
Dim lvCount
lvCount = ListView_GetVis ibleCount(ListV iew1.Handle)
Private Const LVM_FIRST = &H1000
Private Const LVM_GETCOUNTPER PAGE As Long = (LVM_FIRST + 40)
Private Declare Function SendMessage Lib "user32" Alias "SendMessag eA"
(ByVal hwnd As IntPtr, ByVal wMsg As Long, ByVal wParam As Long, ByVal
lParam As Long) As Long
Private Function ListView_GetVis ibleCount(ByVal hwndlv As IntPtr) As
Long
ListView_GetVis ibleCount = SendMessage(hwn dlv,LVM_GETCOUN TPERPAGE, 0&,
0&)
End Function
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* Henry <an*******@devd ex.com> scripsit: For anyone who is interested below is a solution:
Dim lvCount
lvCount = ListView_GetVis ibleCount(ListV iew1.Handle)
Private Const LVM_FIRST = &H1000
Private Const LVM_GETCOUNTPER PAGE As Long = (LVM_FIRST + 40)
Private Declare Function SendMessage Lib "user32" Alias "SendMessag eA"
(ByVal hwnd As IntPtr, ByVal wMsg As Long, ByVal wParam As Long, ByVal
lParam As Long) As Long
Private Function ListView_GetVis ibleCount(ByVal hwndlv As IntPtr) As
Long
ListView_GetVis ibleCount = SendMessage(hwn dlv,LVM_GETCOUN TPERPAGE, 0&,
0&)
End Function
Replace all 'As Long' with 'As Int32', at least 'hwnd' should be an
'IntPtr'. Remove the '&' suffix from the '0&'.
--
Herfried K. Wagner [MVP]
<http://www.mvps.org/dotnet/> This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
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