Serialport using in VB.NET - Visual Basic Discussion Boards

ra_shieru17-Dec-07 11:20

17-Dec-07 11:20

i want to create an application server-cliente i found this page

http://elguille.info/colabora/puntoNET/PabloTilli_SocketsVBNET.htm

this article say i have to create two .dll file`s and then a file to run the application, could you help me or do you know a page where i can see a example, thank`s.

mdb file with access to many user without SQL Server

stephan060717-Dec-07 10:26

stephan0607

17-Dec-07 10:26

Hello,

It is possible to get access with different user to one Access mdb file without SQL Server.
I have a small application (5 user) and I need access in a small network to one mdb file .
Is that posible ?
If yes, how can I do this without to get troubles or data crash.
I use VB Studio 2005.

Thanks in advance

BR
Stephan

Re: mdb file with access to many user without SQL Server

Dave Kreskowiak17-Dec-07 14:56

Dave Kreskowiak

17-Dec-07 14:56

You could use an Access database to do this, though Access was not designed for a multiuser environment. You WILL have to do maintenance on the database and Compact and Repair it every now and again. You WILL eventually have problems with the database.

If you want less problems and more flexibility, go with an SQL Server version, such Sql Server Express (free!).

Since Access is a file-based database, every user will have to have access rights to the file share and folder on the server where the database will be stored. I hope you know what you're doing when it comes to Windows Networking. If you don't, then you better learn before you start this project. You WILL need to know this stuff.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007

Possible parameters in function

helelark12317-Dec-07 5:38

helelark123

17-Dec-07 5:38

Hello,

I have a function ConnectTo in a class clsMakeConnection.

My code is:

Dim MyCon as new clsMakeConnection()
MyCon.ConnectTo(...)

I would like to get a list of the possible connections.
I mean the list that you get when for example you write:
Dim c as color=
and then you get a list of all the colors as following
Color.AliceBlue
Color.Blue
Color.White
...

Is it possible to do that?

Thank you

Shay Noy

Re: Possible parameters in function

Dave Kreskowiak17-Dec-07 14:53

Dave Kreskowiak

17-Dec-07 14:53

There's several ways of doing this. The most basic is creating an Enum to provide this list of options. But, in all cases, it isn't magically created for you.

Public Enum ConnectionOptions As Integer
    SomeOption = someIntegerValue
    SomeOtherOption = someOtherIntegerValue
    ... and so on for each option ...
End Enum

Then, in your method signature of your Connection class:

Public Class clsMakeConnection
    Public Function ConnectTo(ByVal connectionType As ConnectionOptions) As ...

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007

Re: Possible parameters in function

helelark12317-Dec-07 18:38

helelark123

17-Dec-07 18:38

Thank you

Shay Noy

Re: Possible parameters in function [modified]

helelark12317-Dec-07 21:54

helelark123

17-Dec-07 21:54

Is it possible in addition to set a tooltip for each one of the items?

Someone can help?

Shay Noy

modified on Thursday, December 20, 2007 4:49:26 AM

Serialport using in VB.NET

Robert Hsu17-Dec-07 4:05

Robert Hsu

17-Dec-07 4:05

Hello, everyone

I am using VB.NET 2005 to create a project try to monite the PLC device. This project need to send a ASCII string to PLC link <enq>00FFBRAM00001422. I create this string in my program and using SerialPort object to control RS-232 port. I wrote the following code

RS232PORT = NEW system.io.pORT ( "COM6" , 9600 , ....)
RS232PORT.OPEN()...........................This stament execute sucessfull , means RS232port define is ok,
.....
mStr1 = chr(05) & "00FFBRAM00001422"
RS232PORT.WRITE( mstr1 )

and I found the RS-232 port flesh and PLC recive LED also flesh one. But PLC return with nothing. I got another utility and open another com port said COM3, and have null modem connected COM3 & COM6 and RS-232 test utility shows it got a data with 63 5 63 30 63 30 63 46 63 46..... it seems a x63 was added for each character, I wounder why ?

I check the menu say , SerialPort object default use encoding.ASCII format to send data , but why the result seems not,
following is my serial port object setting
? rs232port
{System.IO.Ports.SerialPort}
BaseStream: {System.IO.Ports.SerialStream}
BaudRate: 9600
BreakState: False
BytesToRead: 0
BytesToWrite: 0
CDHolding: False
Container: {System.ComponentModel.Container}
CtsHolding: False
DataBits: 7
DiscardNull: False
DsrHolding: False
DtrEnable: False
Encoding: {System.Text.ASCIIEncoding}
Handshake: None {0}
InfiniteTimeout: -1
IsOpen: True
NewLine: "
"
Parity: Odd {1}
ParityReplace: 63
PortName: "COM6"
ReadBufferSize: 4096
ReadTimeout: -1
ReceivedBytesThreshold: 1
RtsEnable: False
Site: {System.ComponentModel.Container.Site}
StopBits: One {1}
WriteBufferSize: 2048
WriteTimeout: -1

can anyone know where I should change to send data string to PLC normally.

Best regards
Robert

Re: Serialport using in VB.NET

Luc Pattyn17-Dec-07 6:59

Luc Pattyn

17-Dec-07 6:59

Hi Robert,

my personal experience with SerialPort is limited to byte[] communication, I haven't sent
strings yet. But you are not the first to ask similar questions here, from earlier posts
I have got the impression setting the Encoding explicitly once again, maybe after opening
the port, could be useful.

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

Sorry for any delays in replying, I currently don't always get e-mail notifications.

help need for removing image from picturebox

Senthil S17-Dec-07 1:11

Senthil S

17-Dec-07 1:11

Hi all,
I am using a picturebox and i am loading Image by means of
PictureBox1.Image=image.FromFile("filepath and name")

if i want to remove the picture using fso.DeleteFile(paths, True) function. i cant able to delete. it show Access Denied error.

Can you give any idea to solve i,e. remove the image from the picture box after it load by using some delte method???

Thanks in advance

Senthil S
Software Engineer

Re: help need for removing image from picturebox

ChandraRam17-Dec-07 1:43

ChandraRam

17-Dec-07 1:43

Senthil S wrote:
I am using a picturebox and i am loading Image by means of
PictureBox1.Image=image.FromFile("filepath and name")

if i want to remove the picture using fso.DeleteFile(paths, True) function. i cant able to delete. it show Access Denied error.

Can you give any idea to solve i,e. remove the image from the picture box after it load by using some delte method???

Using FromFile will not let you delete the file... try some other method of loading the picture into your picture box.

Re: help need for removing image from picturebox

Christian Graus17-Dec-07 10:36

Christian Graus

17-Dec-07 10:36

You need to load the image, make a copy and dispose of the original. That's a bug in GDI+

Why would you delete it while the picturebox is trying to show it tho ?

Christian Graus - Microsoft MVP - C++

"also I don't think "TranslateOneToTwoBillion OneHundredAndFortySevenMillion FourHundredAndEightyThreeThousand SixHundredAndFortySeven()" is a very good choice for a function name" - SpacixOne ( offering help to someone who really needed it ) ( spaces added for the benefit of people running at < 1280x1024 )

Re: help need for removing image from picturebox

Luc Pattyn17-Dec-07 11:40

Luc Pattyn

17-Dec-07 11:40

I feel a PictureBox.CreateGraphics and an Image.Save coming up. DId you have to ask? Big Grin | :-D

Luc Pattyn [Forum Guidelines] [My Articles]

Sorry for any delays in replying, I currently don't always get e-mail notifications.

security issue

Tauseef A17-Dec-07 0:52

Tauseef A

17-Dec-07 0:52

hi guys

unverifiable code failed policy check,(exception from hresult : 0x80131402)

any one knows any solution about this error ,,

thanks in advance

hello

Re: security issue

Vimalsoft(Pty) Ltd17-Dec-07 21:00

Vimalsoft(Pty) Ltd

17-Dec-07 21:00

hi

here is your help

http://www.groupsrv.com/dotnet/about224229.html[^]

Hope it helps

Vuyiswa Maseko,

Sorrow is Better than Laughter, it may Sadden your Face, but It sharpens your Understanding

VB.NET/SQL7/2000/2005
http://vuyiswamb.007ihost.com
http://Ecadre.007ihost.com
vuyiswam@tshwane.gov.za

Visual Basic 6.0

Member 472059117-Dec-07 0:40

Member 4720591

17-Dec-07 0:40

How Can I Take A Chart Which Is Drawn In MsExcel 2003 To Visual Basic 6.0
Please Reply As Soon as Possible..

Manoj

Re: Visual Basic 6.0

ChandraRam17-Dec-07 1:45

ChandraRam

17-Dec-07 1:45

Member 4720591 wrote:
How Can I Take A Chart Which Is Drawn In MsExcel 2003 To Visual Basic 6.0

I think you can include a reference to Excel workbooks in your project and work with the file... Why would you be doing this in VB6 anyway?

Re: Visual Basic 6.0

anthoy17-Dec-07 19:59

anthoy

17-Dec-07 19:59

why does posting a 'vb6' questions a big deal?

while this is still a Visual Basic Forum..

Mad | :mad:

i never really like this... being a programmer...whhargghh!!

Re: Visual Basic 6.0

Paul Conrad23-Dec-07 14:02

Paul Conrad

23-Dec-07 14:02

anthoy wrote:
why does posting a 'vb6' questions a big deal?

Because VB6 is dead and Microsoft has not supported it since March 2005.

anthoy wrote:
this is still a Visual Basic Forum..

True, but it is mostly VB.NET now.

"Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon

Re: Visual Basic 6.0

CPallini17-Dec-07 3:23

CPallini

17-Dec-07 3:23

Member 4720591 wrote:
How Can I Take A Chart Which Is Drawn In MsExcel 2003 To Visual Basic 6.0

(1) Please don't shout! Big Grin | :-D

(2) You can use the same ActiveX component Ms Excel uses, i.e. Ms Chart.

Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

Re: Visual Basic 6.0

Paul Conrad23-Dec-07 14:03

Paul Conrad

23-Dec-07 14:03

Why are you still using VB6? Microsoft stopped supporting it almost 3 years ago.

"Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon

what is eguivalent in c# for CShort in vb...?

tasumisra16-Dec-07 23:36

tasumisra

16-Dec-07 23:36

Please help me...
in above question..

Thanks..
T@SU

Re: what is eguivalent in c# for CShort in vb...?

Ashish Kumar Vyas16-Dec-07 23:58

Ashish Kumar Vyas

16-Dec-07 23:58

Hi,

You can use like this.....
CShort(str) => (short)str;
* str = any var. or exp.

regards
Ashish K. Vyas

Re: what is eguivalent in c# for CShort in vb...?

CKnig17-Dec-07 2:36

CKnig

17-Dec-07 2:36

Im not sure if (short)str works for - lets say a string.
Better use Convert.ToInt16(str)!
( So I tried:

<br />
            string str = "22";<br />
            short s = (short)str;<br />

with C#3 and this will not even compile! (As I thougt - you can't cast a string to a short - and before you bother: some types have inbuild implicit cast operators to handle those situations!)

Re: what is eguivalent in c# for CShort in vb...?

Dave Doknjas17-Dec-07 14:30

Dave Doknjas

17-Dec-07 14:30

System.Convert.ToInt16 is the closest equivalent.
In general, the System.Convert methods are closer to how the VB conversion macros work than the 'hard-core' C# casts.

The C# casts are closer (but not identical) to VB's DirectCast.

David Anton
http://www.tangiblesoftwaresolutions.com
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