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Quin Nee wrote: Is it possible to recognise the type of data cming in?
Only if you write something to parse the data you've received.
Quin Nee wrote: I want to read the data from each node and save it into different files like the MAC add of each node.
This is only possible if the data you're getting contains that information. If not, there's no way to tell where it came from.
Quin Nee wrote: So far most of what I read about serial comms is just reading character or data
And that's all serial comm is, reading and writing character data.
Quin Nee wrote: Btw, please take a look at my codes and inform me if there are any better methods of doing it.
I can't tell you that because it depends on your requirements, situation, hardware, data your getting and if you want two way communication. What you have now just writes everything to a file, but doesn't have anything to parse the data you're getting nor handle cases where you haven't received enough data yet to parse a command.
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Thanks for the quick reply,
Then how do I parse data? Btw, the data received through the serialport is expected to have MAC address and other information in the form of bits. I believe the data will be in integer forms. How do I change it from ASCII form to readable data?
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Hi,
Looking for a bit of help. I have a program that draws a graph and plots some values. What I want to do is when I hover my mouse over one of the values, up pops a box which shows a bit more information. Is this possible or is there a control to do this?
Thanks for your help
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how you draw a graph? whether it is on form or on panel on some other controls?
i post a article which describe how can you draw a chart using OWC11 .It facilitate you that whenever your mouse is over one of the values then it display related value. See Column Chart[^]
may above link help you
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I draw the graph myself straight on a form. I need something like the way a tooltip box pops up
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You'll have to track the mouse (MouseMove) over the control you're using to draw on. Take the coordinates of the mouse and map them to the points on your graph. Say the mouse is sitting at a point on your graph, or anywhere for that matter, like (20,60). What point did you draw at column 20?? Take that information and put it into a ToolTip window or your own small window. When the mouse moves again, recalculate and move the window.
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Cheers mate,
Sounds like what I'll have to do. One question. Can I have a my own window without the menu bar stuff at the top, without the minimize/max and exit buttons and so on. Is there a way to hide all the stuff.
Thanks for your help
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Sure. Checkout the FormBorderStyle property. You can even have a window with no border and title bar. If you want the title bar, look into the ControlBox property.
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Hi I am looking for working code.
I want to add all the files based on extension should be added to the list box under a particular folder and the subfolders down the line. ( it is like there may be n number of subfolders and subfolders and subfolders)
modified on Tuesday, February 10, 2009 1:34 AM
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Hi,
If i choose a windows application (exe) file then it will shows the reference file (dll) information like VS setup project
Thanks
KV
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What are you talking about?? Are you trying to find which .DLL's the default Windows Forms Application is referencing?? That's easy. Start a new project, then double-click the "My Project" folder in the Solution Explorer and click on the References tab. They're all right there.
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i want that reference (dll) information at runtime and not for current application
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Ohhh...you didn't specifiy that in your question. References don't exist at runtime, so you can't get this list. But, there's is a close approximation.
You can find the CURRENTLY LOADED assemblies (kind of like your references) for an AppDomain by getting the list from AppDomain.CurrentDomain.GetAssemblies(). Something like:
Imports System.Reflection
.
.
.
Dim assemblies As Assembly() = AppDomain.CurrentDomain.GetAssemblies()
For Each a As Assembly In assemblies
Console.WriteLine(String.Format("Codebase: {0}", a.CodeBase))
Console.WriteLine(String.Format("FullName: {0}", a.FullName))
Next
Now, as you run your application, this list may change as execution moves from one assembly in your app to another.
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Hi,
I currently have a background application who read barcodes from a serial port scanner, validate the barcode and send it to wathever application running in the foreground and then display it in the focused textbox. If barcode is wrong, a big red screen popup with an error message and the barcode is discard. This is working fine.
Now, I have to do the same, with a USB keyboard wedge scanner. Is there a way I can read the scanner input from the USB port, in vb.net ? Remember, my apps is in the background, barcodes have to be validate before displaying it in the main screen (which is an excel spreadsheet). Does anyone knows how to intercept keys input in vb?
thanks for your help
Dominic
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Excel is a bit of a problem. You don't get any of the KeyPress, KeyDown events in an Excel worksheet. You can probably get them in a form in Excel though. I'm not sure since I don't do much Office Interop.
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Is the scanner giving you any reads in other apps.. Notepad? If not you may need to ask the OEM if there is a set of default set up bar codes for your scanner and for use with USB in a VB environment. If it is reading to other apps I have seen problems upgrading from one OEM to another my self and have had to go back to the OEM for updated default set up bar codes as some time the published set may not work… We had just started to see USB keyboard wedge scanners before I left NCR as a tech lead in the field, and that was almost a year ago but that is how it was then…
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The scanner reads good, problem is, my application have to intercept the barcode for analyse before sending it to the Excel sheet. My application runs in the background (on the system tray). When using serial port barcode scanner, there is no problem at all, I just have to open the serial port, get the barcode, analyse it and send it to the main program's focused textbox. That way, it works fine. Problem is with a keyboard wedge scanner. How can I program my background application to read the keyboard entries (and analyse it) before sending it to Excel??!
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Ok, if I read you correctly your background app is running looking for data from the RS232- serial port barcode scanner. So there is an active port it is looking at. Change the active port to the USB, The app needs to know what to look for on the system. You should have a Setup barcode for USB host type, Try the IBM Hand-held code, Make 100% sure you do not miss scan set-up BC’s as this will mess you up every time. If you still are having a problem I would ask the OEM of the UBS-BC Scanner…I’m sure they have had the problem and fixed it, it is just not in the docs…
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I have this error, Can any one help me to solve it as soon as possible
Cross thread operation not valid: Control textBox1 accessed from a thread other than the thread it was created on.
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I have a helper class to strongly type data:
Public Class SupplierTrans
Private _date As Date
Private _period As Integer
Private _year As Integer
Private _type As String
Private _reference As String
Private _portfolio As String
Private _netamount As Decimal
Private _taxAmount As Decimal
Private _paidAmount As Decimal
Public Sub New(ByVal transdate As Date, ByVal period As Integer, ByVal year As Integer, ByVal type As String, ByVal reference As String, ByVal portfolio As String, ByVal netamount As Decimal, ByVal taxamount As Decimal, ByVal paidamount As Decimal)
_date = transdate
_period = period
_year = year
_type = type
_reference = reference
_portfolio = portfolio
_netamount = netamount
_taxAmount = taxamount
_paidAmount = paidamount
End Sub
Public ReadOnly Property TransDate() As Date
Get
Return _date
End Get
End Property
Public ReadOnly Property Period() As Integer
Get
Return _period
End Get
End Property
Public ReadOnly Property Year() As Integer
Get
Return _year
End Get
End Property
Public ReadOnly Property Type() As String
Get
Return _type
End Get
End Property
Public ReadOnly Property Reference() As String
Get
Return _reference
End Get
End Property
Public ReadOnly Property Portfolio() As String
Get
Return _portfolio
End Get
End Property
Public ReadOnly Property NetAmount() As Decimal
Get
Return _netamount
End Get
End Property
Public ReadOnly Property TaxAmount() As Decimal
Get
Return _taxAmount
End Get
End Property
Public ReadOnly Property PaidAmount() As Decimal
Get
Return _paidAmount
End Get
End Property
End Class
I am using LINQ to query a generic list (transactions):
Dim tranItems = (From trans In transactions Order By trans.TranDate Group trans By trans.SourceID Into grouping = Group Select New SupplierTrans()).ToList()
but am having touble in referencing the transactions columns within the
'Select New SupplierTrans()' section.
I have tried
Select New SupplierTrans(TranDate ...) without success. The columns (TranDate etc) as now shown in the context hinting. How can I correctly reference these items please?
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Because you created a Constructor, it overrides the default constructor so you cannot do new supplierTrans() unless you specify all the required fields. You have to recreate a default constructor, that is if I remember correctly. If I'm wrong I'm sure someone will correct me.
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First, I would suggest that next time (and this time in your code) you put some line breaks in the query.
As to the problem in your query, let's take a look at what you get at each step of the query:
dim items = From trans In transactions _ 'you haven't done anything yet
Order By trans.TranDate _ 'now the entire list is sorted by transaction date
'but you still return IEnumerable(Of SupplierTrans)
Group trans By trans.SourceID _
Into grouping = Group 'this will create an IEnumerable of an anonymous type
'with the SourceID for the group and an IEnumerable of
'all transactions with that SourceID.
It's not very clear what you are trying to make here, but if you just wanted to sort the list by TranDate and SourceID, you may have been better off with two Order By statements. If you do want the groupings, you could have simply written Group By trans.SourceID Into Group to get the same result.
Just remember that the IDE and Intellisense will almost always give you all the information you need to see what you have at any point. If I were to hover over the items variable, I would see that it is an IEnumerable(Of <anonymous type> ). From there I can type items.First. and Intellisense will pop up the list of members for that anonymous type (in this case grouping and SourceID).
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Hi All,
I am developing a project that sending bulk sms to mobile using serial port. Most of the time it is working properly. Some times am getting the error like,
"The semaphore timeout period has expired"
"The remote system refused the network connection"
and
"The format of the specified network name is invalid"
I have tried with Google search...I got so many articles about this.
But i didn't get the actual resources. 
I don't understand the reason behind it. May I get some ideas??
Thanks in Advance
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You're going to have to start reading and testing possible solutions yourself. It does not appear to be anything wrong with your code, but with an underlying network issue.
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