Visual Basic

Re: Converting from standalone to LAN

16-Jun-04 5:24

These are issues tht only your code can answer. If your app was written properly, then you wouldn't have to do anything to it.
If you hardcoded things like the SQL Server name or used an IP address of 127.0.0.1, then you'll have problems. You should store the connection strin gin the app.config file that goes with your application.
If your app is going to run entirely from a network share, then you have to make sure that the code has permissions to run on the XP machines with the trust it needs. This is done with the .NET Framework Configuration tools.
If your app used hard coded SQL statements, don't. Use SQL stored procedures and parameterized queries.

Like I said, it's entirely up to what you've written already...
For more information about "best practices", see the Microsoft Patterns and Practices site at .NET Architecture Center[^] on MSDN.
But if you want to cut right to the chase, there is the Improving .NET Application Performance and Scalability
[^] guide in the Patterns and Practices library (1,120 pages) that will cover nearly all the topics your looking for.

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

sanjaysagrawal17-Jun-04 0:30

sanjaysagrawal

17-Jun-04 0:30

Hello Dave,

Thanks for the tips. I understand its a long haul ahead ! Smile | :)

Cheers and regards,

Sanjay.

class constructor

ymohd_22216-Jun-04 2:35

ymohd_222

16-Jun-04 2:35

how to pass a value from one form to another using
class constructor.
I declard x as integer integer like this:
Region " Windows Form Designer generated code "
Public Sub New(ByVal x As Integer)
MyBase.New()
.
.
how can I return this value to another form.
Thanks.

Go forward and never Stop....

Re: class constructor

Dave Kreskowiak16-Jun-04 3:19

16-Jun-04 3:19

You want to pass a value to a second form using a constructor. You would have to add a SECOND contructor to your second form's code. Do NOT replace the existing New constructor that doesn't take any parameters. Instead, add a second New constructor, but don't put it inside the Region:

'  Form2 code
#Region " Windows Form Desginer generated code "
    Public Sub New()
        MyBase.New()
    End Sub
#End Region
 
    Private x As Integer = 0
 
    Public Sub New(ByVal value As Integer)
        m_x = value
    End Sub

Now, you said you want to return a value? From the second form? When?

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

Printing a bitmap

Robert Gronenthal16-Jun-04 2:12

Robert Gronenthal

16-Jun-04 2:12

I have a vb.net program that writes a bitmap image to a file..
IE: C:\map\map.bmp

I want to take that file and print it to a specific printer or multiple printers that is not the default printer in the printer menu. I do not want this to be interactive but automatic. Basically the program is a mapping application and I want a copy of the map to automatically print when the address is located. This is for a fire dispatching environment.

Bob

Dave Kreskowiak16-Jun-04 3:36

16-Jun-04 3:36

You would ahve to load the C:\map\map.bmp file into a Bitmap object. Easy enough:

Dim mapImage As New Bitmap(filepath)

Then you would have to get the list of printers installed on the machine using the PrinterSettings object. There is a static member that returns a string array of all the printer names

Dim printNames As String = PrinterSettings.InstalledPrinters

From there you would loop through the list of list of installed printers and print your Bitmap object to each one:

Dim printer As String
 
For Each printer In printNames
    Dim pd As New PrintDocument
    AddHandler pd.PrintPage, AddressOf Me.pd_PrintPage
    pd.Print()
Next
 
Private Sub pd_PrintPage(sender As Object, ev As PrintPageEventArgs)
    Dim leftMargin As Single = ev.MarginBounds.Left
    Dim topMargin As Single = ev.MarginBounds.Top
 
    ev.Graphics.DrawImageUnscaled(mapImage, leftMargin, topMargin)
    ev.HasMorePages = False
End Sub

Warning: This code is untested. I wrote it from memory without the aid of the IDE, so there will WILL be bugs in it! Big Grin | :-D

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

Robert Gronenthal16-Jun-04 8:12

Robert Gronenthal

16-Jun-04 8:12

Dave,

Do I have to add the reference object in order to get these properties to work?

Thanks,
Bob

Dave Kreskowiak16-Jun-04 8:22

16-Jun-04 8:22

Be sure your including this at the top of your code

Imports System.Drawing.Printing

No references need to be set.

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

how can i segment scanned document

superprogrammingdude18-Jun-04 16:41

superprogrammingdude

18-Jun-04 16:41

Bob,

(I am taking a stab at it, I'm not 100% sure, but it douen't hurt to try.)
I don't know how you are trying to print, but you should loop through the procedure with a FOR -> NEXT loop. This will allow you to enter in the amount of time you want to print. In the loop be sure to increase the variable by 1.

Saud AKhter16-Jun-04 0:05

Saud AKhter

16-Jun-04 0:05

i am developing a ocr application i wanna know how can i segment scanned document into text lines , into words , into characters how ca i do this with vb.net

saud

Re: how can i segment scanned document

Dave Kreskowiak16-Jun-04 3:05

How can retrieves the path and file name when I click right mouse on file in Windows???

16-Jun-04 3:05

This is much to complex a topic to be dicussed in the forums simply because it takes a couple of articles to explain it all. Google for "Open Source OCR" and you'll find a bunch of projects and discussions on the techniques involved.

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

tramdtt15-Jun-04 23:40

tramdtt

15-Jun-04 23:40

Im writing app and i have problem with it.
How can retrieves the path and file name when I click right mouse on file in Windows(ex: The files in Windows Explorer, My computer, Desktop...)
Who can help me???
Thanks

tramdtt

Re: How can retrieves the path and file name when I click right mouse on file in Windows???

Dave Kreskowiak16-Jun-04 3:02

Re: How can retrieves the path and file name when I click right mouse on file in Windows???

16-Jun-04 3:02

Is your app being launched from the context menu?

If so, then you need to get the path from Environment.GetCommandLineArgs. This will return an array of Strings and should have the path that your looking for.

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

tramdtt16-Jun-04 15:44

tramdtt

16-Jun-04 15:44

Hi, Dave
Can you speak more clearly for me???
How can register environment variable? I cant find it!!! I use VB6
Do you have any documents about it??? Pls send me: doantram77@yahoo.com
tramdtt

Re: How can retrieves the path and file name when I click right mouse on file in Windows???

Dave Kreskowiak17-Jun-04 2:56

17-Jun-04 2:56

Sorry, I assumed you were using VB.NET.
In that case, you have to get the command line arguments from Command().

Dim cmdArgs As String
cmdArgs = Command()

You don't have to register any environment variables...

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

Read from registry?

Anonymous15-Jun-04 21:27

Anonymous

15-Jun-04 21:27

Can you explain this code to me:
Dim regKey As RegistryKey
regKey = Registry.LocalMachine.OpenSubKey("Software\MyApp", True)
regKey.GetValue("Version", 50)

What Changes mus i do to make the value in the registry read from a text box.

Re: Read from registry?

Dave Kreskowiak16-Jun-04 2:58

where is the winsock control

16-Jun-04 2:58

Are you saying that you want to take a value the user typed into a TextBox and write that value to the registry?

The following code will do that:

Dim regKey As RegistryKey
redKey = Registry.LocalMachine.OpenSubKey("Software\MyApp", True)
regKey.SetValue("Version", TextBox1.Text)
regKey.Close()

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

GaryKoh15-Jun-04 21:25

GaryKoh

15-Jun-04 21:25

hello
i need your help. the text below i get from the msdn website

Change the caption of the form to "TCP Server."
Draw a Winsock control on the form and change its name to tcpServer.
Add two TextBox controls to the form. Name the first txtSendData, and the second txtOutput.

im not sure where to draw a winsock control as mention above
i try searching the toolbox but nothing is found
can you please tell me where can i get it?
do i need to select or enable anything to get the control?
thank you in advance

Gary

Dave Kreskowiak16-Jun-04 2:47

16-Jun-04 2:47

I take it your using VB6...

You have to add the Winsock control to the Toolbox. Right click anywhere in the grey area of the toolbox and select Add Components. Scroll down the list that comes up and click on the check box next to "Microsoft Winsock Control", I think(!), I can't remember the exact name. If you can't find the name, Browse for the file "Mswinsck.ocx" and add that instead. The control came with the Professional and Enterprise versions of Visual Studio 6.0 or Visual Basic 6.0. It does NOT come with the Learning Editions.

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

GaryKoh16-Jun-04 4:02

GaryKoh

16-Jun-04 4:02

hello
im sorry
but im actually using vb.net
im kinda noob when my elder brother is not around to help me
so i use this forum that my brother usually use to find the answer i need
please help me
thank you

Gary

Dave Kreskowiak16-Jun-04 4:28

16-Jun-04 4:28

If your using VB.NET, you don't have the Winsock Control. The example your looking at is for VB6. VB.NET uses the System.Net.Sockets namespace to do everything that the Winsock control did in VB6.

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