VB.NET Listview Extended Styles - Visual Basic Discussion Boards

All problems solved!
App up and running, fully functional, exactly the same as in the C# example. Very pleased.

If anybody needs it, let me know.

Thanks again.

I have a mother form and two child forms. How can I properly code VB.NET to show (make it appear) the second form still recognized as "child" form of the mother though what I've clicked is the active child form's button? For instance, I have one active child and I click its button and another child form appears. How can I "tell" this second form that it is a child not of the one who called it but of the mother form? Thanks...

Creation of child forms should really be left up to the parent form. But,

Dim newChild As New myForm2()
newChild.MdiParent = Me.MdiParent
newChild.Show()

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

I need to establish a connection between one PC and a PocketPC.
Someone can guide me about how can I start?

Thanks

Following might help you to start with

http://www.geekzone.co.nz/content.asp?contentid=3613[^]

http://www.geekzone.co.nz/forums.asp?ForumId=8&TopicId=434[^]

- ashish

Thanks a lot!
Very useful links!!

Any one can make it?
I make form opaque and transparent doing
setstyle(controls.transprant,true)
setstyle(controls.opaque,true)

and
me.backcolor=color.transprant

it i make ellispe in form it looks like rounded firm
but if i move that form it have backgroud . it is not transprant form
How can i make permanent rounded form and round button?

Anyone can help me?

Do ANYONE know anything about this? I have searched hours upon hours this last week to see if anyone can acurrately answer my questions on this topic. I have been trying to get the extended properties for VB.NET 2003 ListView to work. Am I at least on the right track with:

Declare Function SendMessage Lib "user32.dll" Alias "SendMessageA" ( _
ByVal hwnd As Int32, _
ByVal wMsg As Int32, _
ByVal wParam As Int32, _
ByVal lParam As Int32) As Int32

Const LVM_GETEXTENDEDLISTVIEWSTYLE = LVM_FIRST + &H37
Const LVM_SETEXTENDEDLISTVIEWSTYLE = LVM_FIRST + &H36
Const LVS_EX_UNDERLINEHOT As Int32 = &H800
* Note I have several if not all other LVM and LVS_EX constants declared

Some of them work, some of them don't but I am throwing them all into this function call:

SendMessage(ListView1.Handle.ToInt32, Me.LVM_SETEXTENDEDLISTVIEWSTYLE, 0, Me.LVS_EX_UNDERLINEHOT)
*I have even tried Listview1.update() after this call - I realize the one click or two click activate must be enabled in conjunction with this for it to work and have done so via the properties option of the control as well as "Or"ing it with LVS_EX_ONECLICKACTIVATE, still no dice.

Still the Hot items do not get underlined. However if I try
SendMessage(ListView1.Handle.ToInt32, Me.LVM_SETEXTENDEDLISTVIEWSTYLE, 0, Me.LVS_EX_ONECLICKACTIVATE)
The icon changes to a hand (finger pointing) and it seems as though the message is succesfull.

WHY DOES THIS WORK ON SOME AND NOT ON OTHERS!?!?

*Also before you ask, I am aware of the GETEXTENDEDSTYLES and assigning it to a variable and then "Or"'ing it into conjunction with other constants as to not turn off all other extended styles and what not. NOBODY SEEMS TO KNOW ANYTHING ABOUT THE EXTENDED STYLES OF LISTVIEWS AND/OR HOW TO SUCCESSFULLY USE THEM IN VB.NET - WHY IS THE API SUCH A TRICKY SUBJECT THAT HARDLY ANYONE KNOWS ANYTHING ABOUT AND WHY DOES MICROSOFT MAKE GETTING THAT INFORMATION SO HARD?

PLEASE SOMEBODY HELP ME!!!

*If you want to have an idea of what I am trying to do here I posted a question on stopping the ListView from flickering in the VB.NET postings about a week ago. My final objective is to successfully get the LVS_EX_DOUBLEBUFFER to work. PLEASE HELP ME!!!!

I have been having a lot of trouble trying to write to a database. So I thought I would do a quick test. I set up a simple output to a text file, but it wont work. It says I have to grant ASP.NET access rights.

The advice I get from asp.net is

"To grant ASP.NET write access to a file, right-click the file in Explorer, choose "Properties" and select the Security tab. Click "Add" to add the "{machinename}\ASPNET" user. Highlight the ASP.NET account, and check the Write box in the Allow column."

But when I right-click my file there is no secutity option. Can anyone tell me how to grant .net access right for my database?

HEEEEELP!!!

Do you have your disk formatted in NTFS? I think you have to in order to use those permissions. That being said, there should be another way to set the permissions for the folder it is in. What OS and version of IIS are you running?

Brian Van Beek
Here's my boring blog! [^]

I'm using xp professional

Try this: Directory Permissions in Windows XP[^]

Does this help?

My: Blog | Photos

"Man who stand on hill with mouth open will wait long time for roast duck to drop in." -- Confucious

i am writing a control and have inherited from system.windows.forms.control and is there any way to supress certain functionality like the backcolor and font properties because i have no use for these with the control would be greatfull for any help and replies
Thanks Dan

Dan

You could override them and make them private.

Christian Graus - Microsoft MVP - C++

When i override it i cant make it private because the access modifiers do not match.
Thanks Dan.

I want to learn vb.net.I had work in Vb 6.0

Good for you!!!
(are you just bragging or needing help?)

Brian Van Beek
Here's my boring blog! [^]

Hi I have made a text editor in VB.net. I want to know that how can i make it default text editor of window through the programming or setup. Please tell me.

Thanks.

Assuming you are running windows xp, Right click on a text file and click open with -->choose program.., then select your program from the list (or alternatively browse for it) then check the check box on the bottom of the dialog that says "Always use the selected program...."

Brian Van Beek
Here's my boring blog! [^]

I have add the Excel library in my project but i am unable to access it through code.

example

dim excelapp as new excel.application

the automatic popdown list doesnt appers as I write "excel.application"

Mian Rashed Inam Khattak

You might like to first add the reference of Excel component to your project.

- ashish

I am trying to insert data into a database, but it's not working. Before I put the try...catch in I was getting a "it must be an updatable query".

So what I'm thinking is that if it isn't my code, or SQL statement. Then it must be that it doesn't have access to the database. Could someone tell me how I go about giving it access?

Here is my code, just in case its a problem with any of my code.

sConn = "Provider=Microsoft.Jet.OLEDB.4.0;"
sConn += "Data Source=C:\Inetpub\wwwroot\webapplication5\football.mdb;"

Dim sqlStr As String = "INSERT INTO Fixtures(Fixtures.HomeTeam, Fixtures.AwayTeam) Values (?,?);"

oConn = New OleDbConnection(sConn)

Try

oConn.Open()

Dim dbComm As New OleDbCommand(sqlStr, oConn)
dbComm.Parameters.Add("HomeTeam", OleDbType.VarChar, 50, "HomeTeam")
dbComm.Parameters.Add("AwayTeam", OleDbType.VarChar, 50, "AwayTeam")

dbComm.Parameters("HomeTeam").Value = HT
dbComm.Parameters("AwayTeam").Value = AT

dbComm.ExecuteNonQuery()
Catch ex As Exception

If oConn.State = ConnectionState.Open Then oConn.Close()

End Try

Surely you should be closing the connection on a valid query as well as one that throws an exception? If so, then you should consider moving that code to a Finally block. Other than that, your catch block does nothing other than swallow the exception (which is bad practice - if you have a catch you must do something with it otherwise it just hides potential bugs) so you should consider removing the Catch block.

I have to admit that I don't know much about Access databases these days, but a comment I saw in the last couple of weeks would suggest that you might want to look at the permissions of your webapplication directory. Access needs to have writable permission on the folder the database is in because it needs to create a file.

If you are going to give write access to the database through your web application you should consider putting the database in the subfolder of its own so that the web application does not have write access on its root folder - as this is a potential security risk.

Don't know if it will help, but it is possibly worth a go.

My: Blog | Photos

"Man who stand on hill with mouth open will wait long time for roast duck to drop in." -- Confucious

The path C:\Inetpub\wwwroot\webapplication5 must have write/modify permissions otherwise you restrict the database to readonly. Access throws this error as if it were related to the sql. a bit odd but thats Microsoft.

the application was running well in one of the PC .. I uninstalled it cuz the connecting string and DB security need to be added, after installing it i got this error when i try to run an imbeded report

System.TypeInitializationException: The type initializer for "CrystalDecisions.CrystalReports.Engine.ReportDocument" threw an exception. ---> System.Runtime.InteropServices.COMException (0x80040154): COM object with CLSID {CF76A644-314B-404D-8D45-F08B51FF990B} is either not valid or not registered.

the application is working fine in one of the pc's, it was installed more than 2 months ago. But now when trying to install it in other PCs i get this error?
Please note that i have included the merge modules for CR10...so what could be missing?