Visual Basic

Re: how do i get the exe reference (dll) files using vb.net

9-Feb-09 19:21

Hi,

If i choose a windows application (exe) file then it will shows the reference file (dll) information like VS setup project

Thanks
KV

Dave Kreskowiak10-Feb-09 1:51

Re: how do i get the exe reference (dll) files using vb.net

10-Feb-09 1:51

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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Visual Developer - Visual Basic
2006, 2007, 2008

kvelu.d10-Feb-09 2:14

Re: how do i get the exe reference (dll) files using vb.net

10-Feb-09 2:14

i want that reference (dll) information at runtime and not for current application

Dave Kreskowiak10-Feb-09 3:39

read keyboard wedge scanner in vb.net

10-Feb-09 3:39

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

Member 37427839-Feb-09 8:05

Member 3742783

9-Feb-09 8:05

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

Dave Kreskowiak9-Feb-09 12:06

9-Feb-09 12:06

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

Maxwell Barrett10-Feb-09 4:22

Maxwell Barrett

10-Feb-09 4:22

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…

Member 374278310-Feb-09 4:38

Member 3742783

10-Feb-09 4:38

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??!

Cross thread operation not valid:

Maxwell Barrett10-Feb-09 5:40

Maxwell Barrett

10-Feb-09 5:40

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…

Muhammad Fahim Baloch9-Feb-09 5:26

Muhammad Fahim Baloch

9-Feb-09 5:26

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.

Referencing question

kanchoette9-Feb-09 3:41

kanchoette

9-Feb-09 3:41

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?

Re: Referencing question

EliottA9-Feb-09 5:48

EliottA

9-Feb-09 5:48

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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Re: Referencing question

Gideon Engelberth9-Feb-09 16:30

Gideon Engelberth

9-Feb-09 16:30

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).

Err:"The semaphore timeout period has expired"-Using Port

scothyhut9-Feb-09 1:01

scothyhut

9-Feb-09 1:01

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. Confused | :confused:

I don't understand the reason behind it. May I get some ideas??

Thanks in Advance

Re: Err:"The semaphore timeout period has expired"-Using Port

Dave Kreskowiak9-Feb-09 7:55

How to use third party dll at runtime with help of (dll) file path and procedure name

9-Feb-09 7:55

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.

A guide to posting questions on CodeProject[^]

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

kvelu.d8-Feb-09 19:16

Re: How to use third party dll at runtime with help of (dll) file path and procedure name

8-Feb-09 19:16

<b>Sample dll code: </b>

Public Class SWTest
Public Shared Sub kv()
MsgBox("Code Project")
End Sub
End Class

Please help me, how can i import this dll and call the procedure at runtime

Note: My windows application only have the string inputs of (dll) file path and procedure name
Example:
Input1 = "D:\SWTest.dll"
Input2 = "kv"

Thanks
KV

MohammadAmiry8-Feb-09 19:19

MohammadAmiry

8-Feb-09 19:19

see

http://www.omegajunior.net/code/vbnet_unmanaged.html[^]

Re: How to use third party dll at runtime with help of (dll) file path and procedure name

kvelu.d9-Feb-09 0:31

Re: How to use third party dll at runtime with help of (dll) file path and procedure name

9-Feb-09 0:31

hi,

i used your link sample, but i was got this error

Value cannot be null.
Parameter name: ptr

FYI: Please download my sample project from this link <a href="http://www.2shared.com/file/4835939/1eaac353/RunTime_Dll.html">http://www.2shared.com/file/4835939/1eaac353/RunTime_Dll.html</a>[<a href="http://www.2shared.com/file/4835939/1eaac353/RunTime_Dll.html" target="_blank" title="New Window">^</a>]

Note: Please send me any sample project attachment to my email id (to_velu@yahoo.co.in) if possible.

kvelu.d9-Feb-09 0:35