ListView Question - Visual Basic .NET

Joe Fallon

The ListView control is the one used in Windows Explorer Detail view.
When you click a column heading in Windows Explorer to sort the column you
get a little triangle pointing up or down depending on the sort direction.

How do you get the triangle to appear when you click a column heading on a
ListView control in VB.Net?
--
Joe Fallon

Nov 20 '05 #1

Subscribe Reply

1914

Herfried K. Wagner [MVP]

* "Joe Fallon" <jf******@nospa mtwcny.rr.com> scripsit:

The ListView control is the one used in Windows Explorer Detail view.
When you click a column heading in Windows Explorer to sort the column you
get a little triangle pointing up or down depending on the sort direction.

How do you get the triangle to appear when you click a column heading on a
ListView control in VB.Net?

<http://groups.google.c om/groups?selm=erq ckvkiopu68885ne k3i60674c1un04b l%404ax.com>

--
Herfried K. Wagner [MVP]
<http://www.mvps.org/dotnet>

Nov 20 '05 #2

Joe Fallon

LOL!

I don't speak C++.

I guess you are saying there is no VB.Net way to do this.
--
Joe Fallon
"Herfried K. Wagner [MVP]" <hi************ ***@gmx.at> wrote in message
news:bq******** *****@ID-208219.news.uni-berlin.de...

* "Joe Fallon" <jf******@nospa mtwcny.rr.com> scripsit:
The ListView control is the one used in Windows Explorer Detail view.
When you click a column heading in Windows Explorer to sort the column you get a little triangle pointing up or down depending on the sort direction.
How do you get the triangle to appear when you click a column heading on a ListView control in VB.Net?

<http://groups.google.com/groups?selm...74c1un04bl%404
ax.com>
--
Herfried K. Wagner [MVP]
<http://www.mvps.org/dotnet>

Nov 20 '05 #3

Herfried K. Wagner [MVP]

* "Joe Fallon" <jf******@nospa mtwcny.rr.com> scripsit:

I don't speak C++.

I guess you are saying there is no VB.Net way to do this.

There is a VB.NET way, by using p/invoke. You will find a VB6 sample
here, sorry, I don't have a .NET implementation:

<http://www.mvps.org/vbnet/code/comctl/lvheaderimage.h tm>

--
Herfried K. Wagner [MVP]
<http://www.mvps.org/dotnet>

Nov 20 '05 #4

One Handed Man [ OHM ]

have you ever been convicted ?, if so this would make you a 'Convicted
Fallon' and anything that you write which could be said to be typical of you
would mean that you had commited a 'Fallony'

Sorry , could not resist that :-)

Regards - OHM
Joe Fallon wrote:

LOL!

I don't speak C++.

I guess you are saying there is no VB.Net way to do this.

"Herfried K. Wagner [MVP]" <hi************ ***@gmx.at> wrote in message
news:bq******** *****@ID-208219.news.uni-berlin.de...
* "Joe Fallon" <jf******@nospa mtwcny.rr.com> scripsit:
The ListView control is the one used in Windows Explorer Detail
view. When you click a column heading in Windows Explorer to sort
the column you get a little triangle pointing up or down depending
on the sort direction.

How do you get the triangle to appear when you click a column
heading on a ListView control in VB.Net?

<http://groups.google.com/groups?selm...74c1un04bl%404 ax.com>

--
Herfried K. Wagner [MVP]
<http://www.mvps.org/dotnet>

Best Regards - OHMBest Regards - OHM On**********@BT Internet.Com

Nov 20 '05 #5

Joe Fallon

Herfried,
The rest of the thread you pointed me to did include a VB.Net solution from
Jay Harlow.
I just implemented it and it works great.

The trick is to change the column text value when sorting by adding 3 spaces
and the Unicode characters for the small black Up and Down triangles. Strip
them off when changing columns.

Sample code for lurkers:
Protected Overrides Sub dvDisplay_Colum nClick(ByVal sender As Object, ByVal
e As System.Windows. Forms.ColumnCli ckEventArgs)

'remove sort icon from old column.

If SortColumn <> -1 Then

lv.Columns.Item (SortColumn).Te xt =
lv.Columns.Item (SortColumn).Te xt.TrimEnd(Chr( 32), Chr(32), Chr(32),
ChrW(&H25B2), ChrW(&H25BC))

End If

If e.Column <> SortColumn Then

SortColumn = e.Column

mSortDirection = "ASC"

'add down icon

lv.Columns.Item (SortColumn).Te xt &= " " & ChrW(&H25B2)

Else

If mSortDirection = "ASC" Then

mSortDirection = "DESC"

'do the sort

'add down icon

lv.Columns.Item (SortColumn).Te xt &= " " & ChrW(&H25BC)

Else

mSortDirection = "ASC"

'do the sort

'add up icon

lv.Columns.Item (SortColumn).Te xt &= " " & ChrW(&H25B2)

End If

End If

End Sub
--
Joe Fallon
"Herfried K. Wagner [MVP]" <hi************ ***@gmx.at> wrote in message
news:bq******** *****@ID-208219.news.uni-berlin.de...

* "Joe Fallon" <jf******@nospa mtwcny.rr.com> scripsit:
I don't speak C++.

I guess you are saying there is no VB.Net way to do this.

There is a VB.NET way, by using p/invoke. You will find a VB6 sample
here, sorry, I don't have a .NET implementation:

<http://www.mvps.org/vbnet/code/comctl/lvheaderimage.h tm>

--
Herfried K. Wagner [MVP]
<http://www.mvps.org/dotnet>

Nov 20 '05 #6

Herfried K. Wagner [MVP]

* "Joe Fallon" <jf******@nospa mtwcny.rr.com> scripsit:

The rest of the thread you pointed me to did include a VB.Net solution from
Jay Harlow.
I just implemented it and it works great.

The trick is to change the column text value when sorting by adding 3 spaces
and the Unicode characters for the small black Up and Down triangles. Strip
them off when changing columns.

ACK, that will work. Nevertheless it doesn't mimic the nice 3D effect
like in explorer.

--
Herfried K. Wagner [MVP]
<http://www.mvps.org/dotnet>

Nov 20 '05 #7

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