Re: Resetting the DMM by transmitting *RST command through MSComm control error - Visual Basic Discussion Boards

Dave Kreskowiak27-Mar-09 12:02

27-Mar-09 12:02

You can do it with VB.NET or C#, but with great difficulty. There is a ton of COM interop you have to setup in your code and a bunch of structures you have to create and marshal properly. On top of that, there's a bit of an issue with using managed code to write Shell extensions. You can read about that here[^]. It amy force you to write this in C++ instead.

Beyond that, try these[^] examples. Most of which is going to be C#, but can be converted to VB.NET with a little work.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008

Resetting the DMM by transmitting *RST command through MSComm control error

gopalraja27-Mar-09 4:50

gopalraja

27-Mar-09 4:50

Hi,

Actually I want to Communicate the DMM through the computer Comport. So I have created one MSComm control and did following setting and code.
Private Sub Form_Load()
MSComm1.Settings="9600,N,8,1"
MSComm1.CommPort=2
MSComm1.InputLen=0
MSComm1.PortOpen=True
MSComm1.Rthreshold =1
End Sub

I have send the *RST command to reset the DMM by the following code

Private Sub CmdSend_Click()
MSComm1.Output = "*RST"+Chr$(13)
End Sub

When I run this program, The DMM showing errors as -101, -102, -103. All these error are related to characters.

But, When I was running in Hyper terminal mode, DMM communication was perfect. Moreover, the DMM RS-232 setting (Baudrate and all) same as our computer setting. Still I could not communicating with DMM.

Pls help me to found out solution.

Re: Resetting the DMM by transmitting *RST command through MSComm control error

Dave Kreskowiak27-Mar-09 11:59

Dave Kreskowiak

27-Mar-09 11:59

Well, somewhere, you've got at least one of the communication parameters wrong. It would be parity, handshaking, ..., any of them.

BTW, what's a "DMM"?

And if you're using Visual Studio 2005 or above, why are you using the old MsComm control instead of the SerialPort class in the .NET Framework?

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008

Re: Resetting the DMM by transmitting *RST command through MSComm control error

Luc Pattyn27-Mar-09 21:39

Luc Pattyn

27-Mar-09 21:39

Hi Dave,

the only DMM I know would be a Digital MultiMeter, an electronic device measuring voltages, currents, impedances, and the like. Handheld DMMs normally don't have a computer interface, desktop models often do, either a serial one or more often an IEEE-488 one (that is a rather old byte-wide bus for measurement equipment, not to be confused with IEEE-1394 aka FireWire).

Smile | :)

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Re: Resetting the DMM by transmitting *RST command through MSComm control error

Dave Kreskowiak28-Mar-09 12:36

Dave Kreskowiak

28-Mar-09 12:36

I figured that's what it was, but now-a-days, he could have been talking to a synthesizer or a toaster oven! I always ask just to make sure. You know what they say about "assume", right? Laugh | :laugh:

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008

Re: Resetting the DMM by transmitting *RST command through MSComm control error

Luc Pattyn28-Mar-09 13:10

Luc Pattyn

28-Mar-09 13:10

Dave Kreskowiak wrote:
he could have been talking to a synthesizer or a toaster oven

I like a synthesizer with an interface, OTOH I wouldn't connect to a toaster.

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

Re: Resetting the DMM by transmitting *RST command through MSComm control error

Dave Kreskowiak28-Mar-09 16:37

Dave Kreskowiak

28-Mar-09 16:37

Luc Pattyn wrote:
OTOH I wouldn't connect to a toaster.

What?! You don't want to put a webcam in a toaster to get your English muffin's toasted to the perfect golden brown every time? Big Grin | :-D

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008

Re: Resetting the DMM by transmitting *RST command through MSComm control error

Luc Pattyn28-Mar-09 16:51

Luc Pattyn

28-Mar-09 16:51

If the toaster contains a camera, that is OK, but I am not interested in those pictures. I want it to be smart enough to deliver on its promises all by itself. That is what embedded systems are supposed to do, not bother me, just deliver the results.

Now if the manufacturer needs an interface to service the device, he can do so; but again, I'm not interested in it. Oh wait, I might want to include it in my next domotica infrastructure. Have to rethink. If so, it won't be a serial port I'm afraid.

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

Re: Resetting the DMM by transmitting *RST command through MSComm control error

Luc Pattyn27-Mar-09 21:47

Luc Pattyn

27-Mar-09 21:47

Hi,

some guessing is required here.

your DMM probably wants some hardware handshaking (=data flow control), i.e. it needs you to set some control lines high or low, before it wants to listen to you (that would not explain the error conditions you mentioned);
or it wants you to not send stuff when it is not ready, as indicated by some control lines it is setting high or low.
I don't remember how handshaking and control lines work in Win32 or VB6; I do know for .NET

FYI: HyperTerminal by default chooses Hardware Handshake, Win32 does not. So try setting your COM port to hardware handshake.

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

XMLHTTP error

WinCrs27-Mar-09 2:23

WinCrs

27-Mar-09 2:23

HI,

I AM POSTING SOME KB OF XML CONTENT TO WEBSERVER USING XMLHTTP. IT IS WORKING IN MY SYSTEM, IT IS SENDING AND RECEIVING DATA PROPERLY. BUT IN ONE OF MY CLIENTS SYSTEM IT IS NOT WORKING PROPERLY AND IT IS GIVING THE ERROR "The connection with the server was terminated abnormally".

IF ANYBODY HAVE AN IDEA PLS HELP US..

THANK YOU,

RISHI

WinCrs

Re: XMLHTTP error

DaveAuld27-Mar-09 4:45

DaveAuld

27-Mar-09 4:45

I CANT HEAR YOU PROPERLY WHEN YOU SHOUT can you maybe talk a bit quieter.

Have you checked the various system/application error logs?
Have you checked the network stats for the dodgy client, is there high error rates?

Its a start.

Dave
Who am I?: http://www.bebo.com/daveauld/

Shift 2 character spaces

vijay248226-Mar-09 22:19

vijay2482

26-Mar-09 22:19

thanks in advance

modified 28-Nov-12 4:47am.

Re: Shift 2 character spaces

Dave Kreskowiak27-Mar-09 1:36

Dave Kreskowiak

27-Mar-09 1:36

You have to read the documentation on what these methods do (LTrim, Remove, SubString, ...). This is very simple string manipulation, and yes, Remove would be the way to go here.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008

Re: Shift 2 character spaces

vijay248227-Mar-09 4:50

vijay2482

27-Mar-09 4:50

Thanks for that reply...

will gothrough and comeback if i find something not working...

My.Setting.Save

CodingYoshi26-Mar-09 11:44

CodingYoshi

26-Mar-09 11:44

My.Setting.Save() method works and saves what I need it to save. However, when I view the .config file the values in <usersettings>
<appname.my.mysettings> are not the same as those returned by the My.Settings.PropertyName

When you call the Save() method, does it not also save the changes to the config file?

CodingYoshi

Visual Basic is for basic people, C# is for sharp people. Farid Tarin '07

Re: My.Setting.Save

tech60326-Mar-09 16:56

tech603

26-Mar-09 16:56

There should be a folder within C:\Documents and Settings\user\Local Settings\Application Data or C:\Documents and Settings\user\Application Data folder i can't remember exactly where its at but if you browse those two locations, you should see a folder with your program name and in that should be your config file.

Hope that helps.

Matthew Vass
QA Analyst
mvass@hostmysite.com
HostMySite.com

why EnableVisualStyles statement is not giving XP look to application?

JUNEYT26-Mar-09 6:31

JUNEYT

26-Mar-09 6:31

Hi,

I tought that defining EnableVisualStyles would give a XP style look to application. However in design time when I define a backcolor for a button, The glossy look of button disappears. In the mean while, I set the one button's backcolor to system.window color, the glossy look of the button disappeard and now I can't give glossy look to button.

The question is how I can make a button look glossy with a defined backcolor.

Thank You.

What a curious mind needs to discover knowledge is noting else than a pin-hole.

Re: why EnableVisualStyles statement is not giving XP look to application?

Henry Minute26-Mar-09 6:43

Henry Minute

26-Mar-09 6:43

In order to do this, you have to override the OnPaint event handler for the button, and do all the painting yourself.
VisualStyles for buttons is whatever the colour is set to in Windows itself.
There are loads of examples in CodeProject and on the Web. Search for something like 'Glass Button Visual Basic' for ideas on how to do it.

Henry Minute

Do not read medical books! You could die of a misprint. - Mark Twain
Girl: (staring) "Why do you need an icy cucumber?"
“I want to report a fraud. The government is lying to us all.”

Re: why EnableVisualStyles statement is not giving XP look to application?

nishkarsh_k26-Mar-09 19:42

nishkarsh_k

26-Mar-09 19:42

To enable Xp style look for the application go to project properties -> application tab. you will find "Enable XP visual Style" check box. recompile the application and it will work.

External Images

Stephen Lintott26-Mar-09 2:31

Stephen Lintott

26-Mar-09 2:31

Hi all... I'm working on a report (Reporting Services) with an external image. The problem is it's not showing up. I'm passing the image through as a base64 string to the report and converting it back to bytes using the
Convert.FromBase64String function. The code is as follows

Dim location As String = Configuration.ConfigurationSettings.AppSettings("location")                
Dim reader1 As New System.IO.StreamReader(location)                
Dim base64 As String                
Dim BinRead As New BinaryReader(reader1.BaseStream)                
Dim file1 As New FileInfo(location)                
base64 = Convert.ToBase64String(BinRead.ReadBytes(CType(file1.Length, Integer)))                
Dim param As New Microsoft.Reporting.WinForms.ReportParameter("Image", base64, False)                
Dim al As New List(Of Microsoft.Reporting.WinForms.ReportParameter)                
al.Add(param)                ReportViewer1.LocalReport.EnableExternalImages = True                ReportViewer1.LocalReport.SetParameters(al)                ReportViewer1.RefreshReport()
.
.
.

Please ignore the BinReader / Reader bit. I havn't fixed that up yet. If someone can please tell me why this thing is not showing an image. I would be very greatful.

Stephen Lintott Bsc IT (RAU)

Re: External Images

Anubhava Dimri31-Mar-09 0:05

Anubhava Dimri

31-Mar-09 0:05

First you should convert your stream to Bitmap object then you can put it on Picture Image.

Bitmap bitmap = new Bitmap (stream);

Best Regard
Anubhava Dimri

mailto: anubhava.prodata@gmail.com

Count number of similar lines

vijay248226-Mar-09 0:58

vijay2482

26-Mar-09 0:58

I have a text file that has similar lines.
there are 3 fields by which the similar lines can be identified.

modified 28-Nov-12 8:45am.

Re: Count number of similar lines

JernejR26-Mar-09 1:02

JernejR

26-Mar-09 1:02