COMPort Reference In Subroutines VB Express 2008
Sep 21, 2010
I'm trying to communicate through a serial port with separate subroutines for establishing the connection to the device and handling routine messages. I'm able to establish the connection, but reference to the COMPort in another subroutine fails with a message that the port is closed. I can successfully communicate using COMPort.Write commands within the connection subroutine, so I know that works. How do I pass a reference for the comport to other subroutines?
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Dec 1, 2009
I want to add a reference to a libary in Microsoft SDK (SnmpAPI.lib) Visual Basic 2008 Express Edition but is says "C:\Program File\blah\SnmpAPI.Lib" cannot be added.
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Apr 12, 2010
Is the my reference library is available in visual basic 2008 Express Edition?
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Jan 19, 2009
clicking the reference in solution explorer gives me: This project cannot be viewed in the object browser because its unavailable or not yet built. Please ensure that the project is available and built.
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Dec 4, 2009
I have a program which will read data from comport when ever there is data on comport. I am using Comport.DataReceived event to do that.My program will receive data very frequently and it is working fine. The problem is, it will work for 3 to 4 days fine but after that my receive data will slow down. I am receiving data with high delay (about 10-15 min).There will be continuous data to my comport.
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Nov 2, 2010
I am having trouble sending data to a comport..... I am a noob at this and have been doing my head in... I have done a fair bit to a few programs that I have on the go, but am stuck at sending some data to the comport...
I have in form1 put the serial port contol and added SerialPort1.Open() to that. I have then added 3 buttons that I was to use to send data to the port... Since this is for a radio scanner the buttons turn the backlight on / dim and off.....
LTN is used to turn the light on and works fine in hyperterminal.. I have got the port settings right in vs2008 but the code is wrong.
I have:
code:
Then I get warning of Name 'LTN' is not declared...
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Dec 25, 2009
I have a barcode scanner which sends data to USB Port. I want to redirect it into ComPort. So that I can manipulate it. How can I do It in Visual Basic 2008 Or how to convert usb port to ComPort in Visual basic 2008
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Mar 12, 2012
I'm creating a list of labels dependent on a few variables based on search results.Say I have 10 search results, 10 labels will be created within a for each statement, however I want to create subroutines for these 10 labels with an onclick event, is this possible
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Oct 18, 2009
I use Ms VB 2008 express edition with SQL server express. I want to know what is the reference to be added to make a connection the SQL express database?
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Mar 2, 2010
I've tried this example directly from MSDN:
Dim Screens() As System.Windows.Forms.Screens
and I can't find a way to get a reference to the Screen. I've checked my references and they seem fine but I may have missed something. Anyone experience this or know of a bug?
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Nov 13, 2010
I was able to use the VB off line iso file to install VB 2010 Express but it did not include the Reference Library
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Sep 21, 2009
how I can implement my calendar with VB .net express 2008 and MSSQL 2008 Express. How do I get it to work with datasets, binding source etc.If I go to Properties>settings my connection string is:
Data Source=.SQLEXPRESS;AttachDbFilename=|DataDirectory|CalendarDatabase.mdf;Integrated Security=True;Connect Timeout=30;User Instance=True
and I have a table with fields:-
CalendarID
Subject
Location
Purpose
[code]....
I can Add the event to the calendar I have the necessary items on my form linked to my table and I can save them to my table:
Me.Validate()
Me.CalendarTableBindingSource.EndEdit()
Me.TableAdapterManager.UpdateAll(Me.CalendarDatabaseDataSet)
But I cant keep the event displayed on my calendar when I close it and open it again.
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May 8, 2010
I get this error:Reference to a non-shared member requires an object reference.When i compile on the following code section:
Private Sub statusBarToolStripMenuItem_Click(ByVal sender As Object, ByVal e As EventArgs)
ToolStripMenuItem.Checked = Not ToolStripMenuItem.Checked
statusStrip1.Visible = ToolStripMenuItem.Checked
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Jul 7, 2009
[Code]...
I am using this exact code on another form in the same project without an issue, just with a different data source. Any ideas?
EDIT: Never mind, seems like it was a stupid naming scheme and VS was adding a bindingsource with a different name than I wanted.
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Feb 8, 2012
I have two forms form one have one listbox and one checkedlistbox and form2 have only checkedlistbox
on form one checkedlistbox is being updated by listbox_SelectedIndexChanged.
how can update checkedlistbox on form 2 when listbox_SelectedIndexChanged on form1
when i use form2.checkedlistbox.BeingUpdate()
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Oct 3, 2011
I'm just using the default SQL Server Express in my vb 2008 express edition as my database server for my database operation. When I tried to update the records on my table I got a runtime error which indicates the error on this line 'myCommand.ExecuteNonQuery()'and it highlights a yellow background on it. The runtime error says "SqlException was unhandled: An expression of non-boolean type specified in a context where a condition is expected, near 'Number'. ".
Imports System.Data.SqlClient
Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
Dim myConnection As New SqlConnection
Dim myCommand As New SqlCommand
[code]....
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Oct 16, 2010
I tried to start using VB 2010 Express with a program I originally developed with VB 2005 Express that I moved to VB 2008 Express successfully a couple years ago. It uses a database file (*.mdf) that is on the computer ( not out on a server). When attempt to run the program in debug mode, I get the following error "An attempt to attach an auto-named database for file C:Documents and SettingsTomMy DocumentsQuizzing StuffQuestion Database 2010QuizQuest ionGameQuizQuestionGameinReleaseQuizQuestionDB.mdf failed. A database with the same name exists, or specified file cannot be opened, or it is located on UNC share."
I first made a copy of the entire project folder that was working in VB 2008 Express and gave it a different name. In VB2010 I opened the project in the copied folder and it said it successfully converted the project. I am able to open the Data Source inthe Designer and see the database structure as I expect. I think the project is still using SQL Server 2005 Express (because it is what is checked in the list of prerequisites on the Publish tab).
Note, I have programmed off and on for many years, but fairly new to using databases and SQL Server.
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Feb 29, 2012
Here is the scoop: I am trying to make a user account SQL database work with Visual Basic 2008 Express for login purposes, i.e. usernames & passwords. Plan is to host this server so people can login to use the the application and verify they have a valid account. I would like to host all the account information in SQL due to the possiblity of hundreds of users at any given time. I also need the ability to add data to the database for users registering for the first time. The SQL server will need to be able to access the SQL Server databases remote via WAN.
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Jan 21, 2011
I am trying to re write a VB6 program using MS Access, many years ago, using VB 2010 express and SQL server 2008 R2 Express. I have a database with several tables, which I created using the designer. I am able to connect to the database and select data and display it in textboxes etc in vb code. What I have not been able to in code is to INSERT rows DELETE rows or UPDATE any data in the tables. I can do any of these operations using the Query Designer, but I want to do it in code. I can post some code if necessiary, but I thought it might just be some property that I had not set in the designer.
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Nov 20, 2010
im currently working on a program which prints serial text to an aplication like note pad. the problem im having is that i cant figure out how to change which serial comport is being used in code. i want the user to chose the comport with a check box.keep in mind that COM1 in my code is what i called my check box. here is my curent code:
Public Class Form1
Private Sub OpenFileDialog1_FileOk(ByVal sender As System.Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles OpenFileDialog1.FileOk
Shell(OpenFileDialog1.FileName, 1)
[code]....
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Sep 28, 2009
I would like to ask about sending an image file through serial port to a external embedded processor....
the way i think i want to do it is that i would like to open the image file in VB.NET as a binary file and then
1)either converting this binary file to a text file and then read the content of that text file to sent it through UART to that external processor or
2)Converting the binary file into an array and send that array through uart.[code]...
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May 6, 2007
I have a USB gadget that appears to Windows as a USB serial port, there is no special driver.I know the USB Vendor ID, and the USB Product ID, I need 1 or 2 functions:
First: IsThisUsbDevicePresent( Vendor_ID, Product_ID )
Second: Some means of transforming the above into "COM1" or "COM9" or what ever it is so I can call it. And that- should be doable from VB...
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Feb 29, 2012
there Dream in Code Community! Im an okay programmer as far as skill right now I am still learning as we all are I need some help from some experienced VB.NET programmers in the community, Here is the scoop: I am trying to make a user account SQL database work with Visual Basic 2008 Express for login purposes, i.e. usernames & passwords.
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Feb 24, 2010
The program I am trying to modify was initially written using VB 2005 Express. I have subsequently downloaded the 2008 version. The program creates a monthly spreadsheet from a template. The old code that will no longer (highlighted and underlined) compile is as follows:
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Oct 23, 2009
Im connecting a infrared transmitter by serial port, Rs232 to my pc. Anyone know the coding for the comport to detect the signal and auto trigger a sms event(by gsm modem) ??????
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Dec 25, 2009
I am trying to read data from comport and display data in a rich text box.
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Apr 19, 2010
I need to interface between a PC and a Microcontroller based Controller to transfer data between the PC and the Controller?
Ive got acces to the register numbers or names in the Microcontroller.
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Mar 5, 2010
I'm using VB 2008 Express for our College Project. I'm also running SQL Server 2008 Express and have installed SQL Server Management Studio and used it to create my database. Both software have been installed and running locally. I'm trying to connect to the database from VB 2008 Express. Database connection wizard have 3 options:
connecting to Access db
connecting to SQL Server 3.5 compact db and
connecting to SQL Server db file.
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Jan 7, 2010
I have SQL 2008 Express and Visual Basic 2008 Express runing on XP Professional SP2. When I select add new data source from VB I don't have the option to connect to SQL Server 2008 express to get at the to SQL Server Database. I also notice that the OLE DB connector is not availble as a data connector. Can somebody please confirm that VB 2008 Express can connect directly to SQL Server 2008 Express and how I can achieve it.
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Jan 7, 2009
'm trying to use Visual Basic 2008 Express and connect to a DB of SQL Server 2008 Express but ... you can tell me why in the Database Explorer and the Data menu of VB only have the following options for data source? Microsoft Access Database File Microsoft SQL Server Compact 3.5 Microsoft SQL Server Database File does not have the options Microsoft ODBC Data Source Microsoft SQL Server obs.: I have the Visual Web Express 2008 installed, and there are the options available.
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