Communications :: Differentiating Bar Code Entry To Keyboard Entry?
Jul 10, 2009
I am trying to make a program with a bar code reader for the first time. I am programming with VB 2005. I want to differentiate a bar code entry to keyboard entry. My questions:
1. Does bar code reader generate a keydown (or keypress) event for each of the digits of the entry? For example, if the barcode read: 1234567890, does that mean that there will be 10 keydown (or keypress) events for that single barcode that was read?
2. I have read from the posts that the best way to differentiating keyboard vs bar code input is to analyse the time between keystroke (for less than certain number of milliseconds).
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Jul 11, 2009
I am trying to make a program with a bar code reader for the first time. I want to differentiate a bar code entry to keyboard entry. My questions: 1. Does bar code reader generate a keydown (or keypress) event for each of the digits of the entry? For example, if the barcode read: 1234567890, does that mean that there will be 10 keydown (or keypress) events for that single barcode that was read?
2. I have read from the posts that the best way to differentiating keyboard vs bar code input is to analyse the time between keystroke (for less than certain number of milliseconds).
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Nov 4, 2011
What is the code for ignoring the case of an entry while checking to see if the entry is correct or not... (i.e. in a flashcard program... given definition, asks for the name) I don't want the case of a character to affect whether the answer is correct or not.
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Oct 16, 2009
All I want to do is to stop my application at a certain point, wait until a certain key is pressed - say for example the space bar, then continue execution. How simple is that! Any other normal programming language, this would take me a few secs - but not VB2008
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Sep 8, 2009
i am pulling together a cash register that will allow both bar code product entry and manual key entry.imagine if you have a tin of beans in front of you, in a small corner shop they would probably type "47" and then hit "Produce". Fairly straight forward as I have the button Produce to act upon my code and update my salestrans.mdb but,if you scan the bar code I want the same form to handle both 'real' actions, (i assume that keyboard emulation barcode scanner includes "ENTER" after providing 13 digits)....
Q. in perhaps a long winded way i want to know how to kick off an event based on the "ENTER" key being activiated by the barcode scanner)?i do not want to have to hit any buttons if i am scanning bar codes.
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Apr 2, 2012
I use VB in VS2010..My form has a textbox..I can control the keyboard entry by using the SuppressKeyPress method..However this does not work for the Menu key - I think it's the menu key - the one that looks like a combo with an arrow.This produces a large drop-down menu which I don't want.On checking various forums it appears that the following code should work..[code]
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Mar 31, 2010
I am new to VB8 upgrading from VB4.I have lots to learn, but am having a problem.I wrote a simple program with two buttons on the GUI.One is for execution and other is for clearing old data.When I enter code data in the button for execution, it also repeats in the code block for clearing the screen.The same happens when I enter code in the screen clearing object, it will repeat in the execution object.Also when I double click on the objects from the design form for button2, I see a reference to button1 in the code area.The same thing has happened when I click on button1, I will see reference to button2 in the code ara.
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Mar 22, 2012
I am trying to create the code which will stop duplicate entry of an Account Number being entered in the column 'Account Number'. The user is to input an account number (three digit account number i.e 153) using an input box and this will then be printed into the A column.What is the best way to prevent duplicate account numbers being entered?
The code I have for the input/account number array so far is:
[Code]...
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Apr 16, 2012
CODE:
That code works to read the entry data and to recognise the correct data, and the incorrect. However, even if entry is correct, the error msgbox will appear (x times of how many records there are in file), despite being navigated to the menu. Anyway that the Else isn't triggered when data is correct. Also for it to appear just one instead of (x times of how many records there are in file.)
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Feb 1, 2010
I am using sql for this, I would like to know How I can allow only one entry (in the database) per day for each user ID
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Mar 12, 2012
Public Declare Auto Function SQLConfigDataSource Lib "ODBCCP32.DLL" _(ByVal hwndParent As Integer, ByVal fRequest As Integer, ByVal lpszDriver As String, ByVal lpszAttributes As String) As Integer[code]...
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Jun 21, 2010
I'm doing a project where I need to have people register by entering a username and password. When they click register I want them to be added to the database, but I'm having trouble doing this. Can anyone help? This is my first time using VB.[code]...
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Oct 13, 2011
I have an XML below like this and I want to add in another entry to it:
<?xml version="1.0" encoding="utf-8"?>
<CampaignRewardsVoucher>
<VoucherCode>Vouch001</VoucherCode>
<Quantity>3</Quantity>
</CampaignRewardsVoucher>
I have the above xml but I want to add Vouch002 after Vouch001:
<VoucherCode>Vouch002</VoucherCode>
<Quantity>3</Quantity>
</CampaignRewardsVoucher>
I have the code below which checks if an input is a duplicate and update accordingly, if not I want to create a new Vouch002 entry
'Create XmlWriterSettings
Dim settings As XmlWriterSettings = New XmlWriterSettings()
settings.Indent = True
[Code].....
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Jun 21, 2010
I Use visual Basic 8.0 and Mysql 5.0 I have two exactly the same Tables:
Table1:
RecordID , Integer = primary key auto_increment NOT NULL
Articlenr , Integer
Articlename, Char(20)
[code]....
I want to add all the records from table1 to table2. I want to do this 10 times if I execute the following statement: INSERT into Table2 SELECT * FROM Table1 ; Everything works perfectly. The two records are added to table2 But if I execute the stament a second time get the following message: Duplicate entry '1' for key 1 I now i must do something with "duplicate key update" in the Insert statement.
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Mar 4, 2010
I've produced an IP Entry box with similarities to the one Windows uses when setting addresses.It seems to work (I say seems),th the setting of text.I have code that checks the entry of text so this seems fine, but when text is being set through code, it allows anything and i'm unsure on how to make it only allow numbers and numbers between 0 and 255.
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Mar 25, 2009
i know it might be impossible to achieve (as i've been reading from another articles) but does anyone know how to set a dll entry point in VB.net project? I have created a VB.net dll and trying to call that dll from cobol (unmanaged code). in Cobol, i can only use the entry point statement to call VB.net dll (cannot add reference to it). as consequence, i'm getting "called program not found" (or in VB error is equal to "can't find dll entry point")
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Jun 16, 2011
In my program I need to test whether an entry is available I ue the following code:
If Not (westTF(Me.K) < 0) Then
If westTF(Me.K) Then
Exit Sub
End If
End If
This does not function, but when I remove the outer IF it is OK. ( I need to test otherwise an error is generated when West is exhausted).
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Feb 15, 2012
This is my Vb.net Project for company i want to generate code for each individual slip so that i get one field as unique field for that i want to use date & slip no to generate unique key. i have attached screen shot my project in this date 21/12/2011 & slip no is 12 now i want to generate unique number as 21121112 (i.e 21/12/2011 as 211211 & slip no is 12 appended at the end)if u have code then attach with your solution
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Feb 14, 2011
I am trying to update a few entries in a access database through VB.NET. With the code I used below could anyone help me out and show me where I made a mistake because it is creating new database entries instead of updating them.
[Code]...
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Jun 28, 2011
I have a form with textboxes for entering data. One of the textboxes is for entering a value that is always one character. How can I make the cursor automatically jump to the next control when a character has been entered? I'm thinking the key press and release event and then set focus but is there a better way?
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Sep 7, 2010
im currently working on a project for a warranty company. I need to be able to attach pdf files using a browse button that will save them to the file, so that later if the contract is reviewed we can pull of the scan of the contract without say having
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Dec 6, 2011
this is the event table that records all the status(IN/OUT):
[Code]...
So am making a sign in-out program using vb.net and mysql. i was wondering if theres a code i can put in somewhere that will be like if a user opens the application he/she must signin before they can signout and if they open the application and they've already signed in, they cant signin again they must signout before they can sign out again.
[Code]...
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Nov 14, 2009
I am trying to create a data entry wpf form and I am getting the following error when trying to create a window1 loaded event: "table name table adapter is not a member of file name.new data connection set table adapter.table adapter manager" I understand the error message and checked all my names but to no avail. Below is my class statement and window 1 loaded event:Private data connection as new data connection setprivate tatable as new data connection set table adapter.table name table adapterprivate tamanager as new data connection set table adapter.table adapter managerprivate view as collectionvie
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Aug 9, 2010
How can you add a system DSN with its security credentials programmatically at runtime from VB.NET? Keeping key in ODBC.INI is done, but when creating ODBC, it asks for Authentication Type (SQL or Network Login).How can we set that option at runtime?
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Oct 9, 2010
I have a program to make for a class i am in and i am stuck on this one part, its a form application where you have to enter the first and last name of five students along with their final grade then you click a submit button after each one and i need it so that after all five buttons are clicked it activates the summarize button and i can't figure out how to do that and another thing when you hit the summarize button it has to compare the grade against the value of a text box containing the pass threshold to amount how many passed or failed.
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Jul 31, 2009
I have an application which has a label, set to multiline. This area of the app is for notes and comments. One of the database tables behind the app is specifically for thenotes/comments table.I want to set it so that when someone puts in a new entry, the date is auto-inserted so we can see when they did it.
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Apr 30, 2009
I am using Visual Basic 2008, and I am making a simple meeting planner program. The data stored for each day is stored into an array with three fields:
calendars.Days
calendars.ToD
calendars.Appointment
[code].....
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Jun 21, 2010
I'm trying to delete an entry from my database, i have the code written to display the details in a listbox but now i need to write the code do the user can select the item they want to delete and then click the delete button to delete it? I just want to flag it as deleted not get rid of it completely from the database?
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Jan 5, 2010
I am trying to find the last position of a name in a list.I have tried the following:Dim instructorp As String = lstInstructor.SelectedItem.ToString Dim endpos As Integer =instructorp.Length "Length" does not retieve a value. I think it is because there is a tab character in the string.
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Jun 12, 2009
Just lately I've been 'playing' with entering data into a ListView and I have come up with the following code which seems to be OK. Can anyone see if there is any fault with it?
Code:
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