Visual Basic

Dave Kreskowiak27-Dec-06 7:41

27-Dec-06 7:41

vbbeg wrote:
basically im wanting to find out if its ok in terms of it still being a secure location.

What made you think it was a secure location in the first place? The answer to your question depends on what you mean by "secure"? Are you looking to store encrypted or plain text data there? What are you doing with this information?

Dave Kreskowiak
Microsoft MVP - Visual Basic

vbbeg27-Dec-06 16:52

27-Dec-06 16:52

hi dave.

at the moment im thinking of storing plain text. my app runs mdb database and i wanted to store variables and strings saved in app settings such as
user logged in to app , tax/vat variables. i also planned to write these settings to a file which can be restored to registry if needed be. what advise can you offer on this. is it ok for me to do so and is it consider ok
practise for an app.

Thanks Dave.

Robbo

Dave Kreskowiak28-Dec-06 3:02

28-Dec-06 3:02

From your description, you don't need to store any of this stuff to the registry. Applicaiton settings should be stored to a file in the users Application Data folder in their profile. You also don't need to store them in two different places. This will only create extra work that's unnecessary.

Dave Kreskowiak
Microsoft MVP - Visual Basic

vbbeg28-Dec-06 4:50

28-Dec-06 4:50

Dave.

Thanks I think you've confirmed and answer my question. just to confirm with you. the application settings are what the user needs to setup before using app. for example. This is a invoicing app and the user has to enter the following.

- invoice number (where they want their invoice numbering to start from)
- tax/vat (the tax or GST as wel call it in australia)
- delivery charge rate
- discount /specials rate .

so if im to store these in the user APP DATA FOLDER. can you just tell what i should be saving into in terms of FILE AND FORMAT etc. what do u recommend.
I mean do others apps also store these kind of settings in users APP DATA FOLDER. I would like to practise the standards of such programming.

Thanks again. I really appreciate you getting back to me on this

Robbo

Dave Kreskowiak28-Dec-06 12:43

28-Dec-06 12:43

The usual now-a-days is an XML file. Easy to maintain and edit...

Dave Kreskowiak
Microsoft MVP - Visual Basic

vbbeg29-Dec-06 4:49

29-Dec-06 4:49

Thankyou Dave.

I will take what advice you've given me. I'm assuming it should be ok to store XML file in APPLICATION STARTUP PATH aswell.

Cheers.
Robbo

Robbo

Dave Kreskowiak29-Dec-06 5:03

29-Dec-06 5:03

Yes, in most cases. Placing it there will have the same settings for the app for every person who runs it on that machine.

Dave Kreskowiak
Microsoft MVP - Visual Basic

vbbeg29-Dec-06 8:12

29-Dec-06 8:12

Thanks Again Dave.

I feel pretty bad to ask one more thing and can appreciate you assisting many others like myself but if possible are you offer any advice or good material for creating invoice printing for VB.NET without any report utilities like crystal reports. I would like to do it in VB.NET only without any report addins.

I honestly can't thankyou enough.

Robbo

Dave Kreskowiak29-Dec-06 15:01

Deployment \ Program Publishing

29-Dec-06 15:01

Well, it's a PITA. You basically have to create you own print document and paint the data into the appropriate places on the (blank) page so they just happen to fall into the boxes on the form. This will take CONSIDERABLE trial and error to get the placements correct. You can come up with a system that accepts an offset (X and Y) from the top left corner to place each field. You then save each of these offsets to a file so you can reload them later. It's not too difficult to do, just a royal PITA to lay it all out correctly. I've seen the same thing done with fingerprinting systems (law enforcement) that print fingerprint cards to send to the FBI.

Dave Kreskowiak
Microsoft MVP - Visual Basic

Karma3125127-Dec-06 4:30

Karma31251

27-Dec-06 4:30

I am using VB 2005 Express Edition and i am trying to deploy\Publish my porgram and i can publish it with no problem but when i go to run the program outside the VB environment it crashes. Anyone can tell me or direct to a sort of step by step so i can make sure i did it right?
thanks

Is the .NET framework installed on the target machine ?

Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog

Crashes with what error message?

Dave Kreskowiak
Microsoft MVP - Visual Basic

I am trying to run the program from the server and i know that the computer has the framework, i cant say that the erver does with absolute certainty, but i will check into that. The error i get is the standard "windows has encoutered a problem with this program, and it must be shut down"
Microsoft Error Msg
Code: 0xe0434f4d
Flags:0x00000001
Record: 0x0000000000000000
Address: 0x000000007c59bc3f

thanks for responding

Dave Kreskowiak27-Dec-06 4:57

27-Dec-06 4:57

Code running from a non-local source is, by default, not trusted and runs inside a secured sandbox that limits its access to the local machines resources. Read up on Code Access Security[^] before you try and run your app from a server.

As a test, I would copy your app to the local machine and run it from there instead of the server to see what happens.

Dave Kreskowiak
Microsoft MVP - Visual Basic

Karma3125127-Dec-06 7:43

Karma31251

27-Dec-06 7:43

I am trying to run the program from the server, because i need multiple users from different computers the be able to access the same program. It has a database and thus the data needs to be in one place.

Dave Kreskowiak27-Dec-06 7:51

27-Dec-06 7:51

Then you better read up on Code Access Security so you know what's involved in getting this to work and what the pitfalls are.

Dave Kreskowiak
Microsoft MVP - Visual Basic

Karma3125127-Dec-06 9:28

Karma31251

27-Dec-06 9:28

thanks i will read up on that, one question does this still pretain if i am trying to run the program on the server. I just want to be able to access the program through the server, but all the files and everything will be saved and modified on the server, the actual local computer will just be used to view, edit data, the program.

Dave Kreskowiak27-Dec-06 13:01

Filename of LastWriteTime

27-Dec-06 13:01

If the code that is executing is loaded from a non-local source (a media that is not physically attached to the local machine) it is not trusted. It doesn't matter what your using the code for.

If the code is run ON the server (not from it) then it gets as much trust as the user who launched it. If it's run FROM the server (the code is loaded from a network share, or other remote source, and is running on a local workstation) it doesn't matter who launched the code, it's running in a restricted sandbox.

Dave Kreskowiak
Microsoft MVP - Visual Basic

VK-Cadec27-Dec-06 3:44

VK-Cadec

27-Dec-06 3:44

Hi - I am trying to get the filename of the last written file in a directory. Any ideas why this code doesn''t work?

        Dim _direct As DirectoryInfo<br />
        Dim _strLastfileName, _strDirectpath As String<br />
<br />
        _strDirectpath = txtExportPath.Text ' path to directory<br />
        _direct = New DirectoryInfo(_strDirectpath)<br />
        _strLastfileName = New FileInfo(_direct.LastWriteTime).Name.ToString

Re: Filename of LastWriteTime

Dave Kreskowiak27-Dec-06 4:53

resize of column width in MSFlex grid

27-Dec-06 4:53

The only way to know which file was written to last is to get the LastAccess time for every file in the folder, sort the list and get the filename off the top of the sorted list.

The LastWriteTime of the Directory is a change in the directory entries for that folder, not the last write to a file in that directory.

Also, The FileInfo class constructor takes a filename as a string as an argument. You're supplying a DateTime object (_direct.LastWriteTime) as the argument, which won't work.

Dave Kreskowiak
Microsoft MVP - Visual Basic

pdeep27-Dec-06 2:39

pdeep

27-Dec-06 2:39

I am doing a VB application,used MSFlex grid control to display the data from the table. column header text and cell values of a column are truncating(not visible fully), user manually needs to be draged everytime when it was loaded. Any idea how to fix the column width of flex grid.

Thanks in Advance
Bye
Pradeep

PradeepG

Re: resize of column width in MSFlex grid

ChandraRam27-Dec-06 2:58

ChandraRam

27-Dec-06 2:58

pdeep wrote:
I am doing a VB application,used MSFlex grid control to display the data from the table. column header text and cell values of a column are truncating(not visible fully),

I do believe that there is a property ColWidth that you can set for each of your columns.

pdeep wrote:
user manually needs to be draged

How to measure two points on a foto?

Zero-G.27-Dec-06 1:56

Zero-G.

27-Dec-06 1:56

Hey NG

I want to mease some points of an foto from a digital camera, like you can see http://www.prisma-computer.de/optik/software/augenoptik/foto-pupillometer.html[^] here.

Does anyone know, how to do things like that? - Is there anywhere a tut? - I do work in VB2005

THX!

Dave Kreskowiak27-Dec-06 5:22

27-Dec-06 5:22

In order to measure the distance between two points on a plane, you need, at a minimum, one of three things:

1) A calibration of a known distance between two points in the photo on the same plane as the subject being measured. An example would be a scaled ruler or some other measurement.

2) The focal length of the lens used to take the photo.

3) The distance between the film plane in the camera and the target objects in the photo.

From there, it's a matter of some trigonometry to get the distance between any two points on the same plane in the photo.

Dave Kreskowiak
Microsoft MVP - Visual Basic

Zero-G.27-Dec-06 21:58

Zero-G.

27-Dec-06 21:58

Hey
Thanks for the fast answer.

1) - This 3 points are no problem.

But

1) How Do I get the two pupils? - So that I I can't take a foto of a bottle or something?
2) How can I take the outermost points of the frame automatic, so that the user only has to insert the value for this points?

Is there any sample, where I can take a look (Written in VB?)

THX

Dave Kreskowiak28-Dec-06 2:59

28-Dec-06 2:59

Now your getting into an area that I don't do. Image recognition is not part of my background at all. This is goign to take some SERIOUS research to find those pupils.

Dave Kreskowiak
Microsoft MVP - Visual Basic