VS 2010 Prevent User O Modify Barcode
Oct 18, 2011I am trying use barcode for input but prevent user to modify the barcode they scan, user are not allow to input the barcode number by keyboard. i am using vs 2010 vb.net
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VS 2010 Prog Appends A Textfile - User Able To Delete Or Modify While Form Open?
May 17, 2012Prog appends a textfile. Don't want user able to delete or modify while form open. How do I do this?? - As long as form is open user cannot modify or delete textfile. But so the file can be edited from within form
How do I do this. Here is my code so far
Public Class Form1 Dim FILE_NAME As String = "C:UsersBirthdayDocumentsinfo.txt" Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
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Process.start Access Denied - Create A User Account And Modify It's Registry Before The User Logs On The First Time
May 31, 2012I thought I postet this yesterday but I can't find my thread so if this is a duplicate please point me at the original one. Background: I need to create a user account and Modify it's registry before the user logs on the first time. Creating the account is done by using the Winnt provider (works great). To create the profile I'm trying to use Process.start to launch a process as the newly created user. With the use of loaduserprofile property the users profile gets created and i can do my regwrites without problem.
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VS 2010 Prevent An Error If The User Types "0" Into Column 2 Or 3
Mar 4, 2011In my datagridview I have 3 columns, lets say Column1, 2, 3.
Column1 is Column2 / Column3.
Problem I have is I'm trying to prevent an error if the user types "0" into Column 2 or 3. I can prevent against it dividing by null or a letter by the following codes:
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Serial Port Barcode Scanner Delegate Sub Firing Twice Per Barcode Scan?
Aug 2, 2010I am using Richard L. Grier's Enhanced Serial Port dll to read input from a serial port barcode scanner I notice that the datareceived event fires only once per barcode scan, but the delegate sub fires twice per barcode scan. Once for 1st half of Barcode , 2nd for 2nd part of barcode This makes it hard to capture the full barcode so it can be passed to routines in my vb.net 2008 windows application In Richard's example 'Test Enhanced Port' program he sends it to a textbox using .selectedtext and it works fine Richards Delegate code ......................
Public Delegate Sub DisplayData(ByVal Buffer As String)
'This delegate routine marshals receive data from the receive thread context DataReceived to the Windows Form STAThread context
Private Shared Sub Display(ByVal Buffer As String)
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I am trying to set a variable to the full barcode to pass to routines, instead of writing to a textbox but am not having any success
Make A Program That Will Use A Barcode Scanner Well Ofcourse To Scan A Barcode
Nov 27, 2009I am a student and I am about to make a program that will use a barcode scanner well ofcourse to scan a barcode. My problem is i don't know what library to use and what certain things i need to do so that when i am going to scan a barcode it'll be something like show it on a textbox and pull something from the database. i've actually research some. i've seen mscomm1 (not so sure about that) and POS for .net (haven't fully understood its use) were those will help me develop my program?i have a metrologic ms9520 Voyager barcode scanner. and i am going to create a program for it in vb2005.
View 1 RepliesGet A .Net PDF Viewer Tool That Will Accept The Barcode Font As Well As Allow The User To Save, Email, And Print The PDF?
Aug 25, 2009I'm looking for a .Net PDF Viewer tool that will accept the barcode font as well as allow the user to save, email, and print the PDF. I tried the tool by SkySof, but it doesn't handle barcodes. We're having trouble using the COM PDF control because of other stuff that needs to be installed on our servers. Our customer would prefer that the tool be under $1000. We're using Visual Studio 2008 and this is a windows application being served up by Citrix.
View 1 RepliesVS 2010 Barcode Key Up?
Nov 23, 2010So i bought a cheap USB barcode scanner to play around with. So far pretty simple to use, on theing thats baffling me though is after the keyUp event and the string parsing, how do i reset the value of the textbox that reads the string to make it wait for a new keyup event. Eventually i'm going to try adding rows to tables and autocompleting cell values based on the parsed string. So what would be the best way to start looking at this?
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Restrict User To Modify Field Selected In Combo Box?
Jan 7, 2012If there are fields in a combo box as i press the drop down arrow. and if i select a field... then it should not b deleted using a backspace or anyother key..
View 3 RepliesAllow User To Modify ToolStripMeneItems / RadioButtons That Are Being Used As Part Of Webbrowser Navigation?
Nov 22, 2010I have created an application that has a webbrowser, two radioButtons, button1, and a menustrip.The menustrip has two main heading and under each heading are about 15 Tool Strip MenuItem. The ToolStripMenuItem properties are set to CheckonClick and an example of forum1. vb code for this section of the application is:[code]What I need is for the user to be able to add his/her own ToolStripMenueItems to those already present, along with the base url.So that clicking Button1 sends them to the base url And also have the Radio Buttons automatically add the extensions to the base url when the RadioButton is clicked.They need to be able to do this from the application itself.But I'm not sure how to code this in.They will not have VB to make modifications.
View 1 RepliesCapture Barcode From Background In VB 2010?
Jun 6, 2011I'm looking to create a program which will run in the background, but will capture any data input by a barcode scanner. Since barcode scanners work more or less as keyboards (I'm not familiar with the specifics of the implementation, but my reading and their behaviour suggests this) my plan was to simply capture all keypresses and look for a distinctive pattern (sequence of numbers entered in improbably fast succession).
I'm a little concerned, however, about the fact that this will require holding up keypresses until I confirm a match. The holdup will probably be barely noticable, but it's still not ideal. My quesetion is: is there any better means of implementation than simple key and pattern detection, for example detecting that the keypresses originate from a barcode scanner?
VS 2010 Lose Focus With Barcode Scanner?
Mar 27, 2012I've got a lose focus textbox which when data in entered and the tab key is hit the code is executed as expected and a message box appears informing the user of the outcome. However when I used a barcode scanner with a tab function embedded, the code is executed and the data is inserted into a database but the textbox to say if the request was successfully completed or not does not show as expected.
View 1 RepliesVS 2010 Read 2D Barcode Encoded With Base256
May 25, 2012I have to read a 2D barcode that's encoded with base256. When I scan the barcode, it sends different characters as it comes from the keyboard and it changes the focus, turns visual studio in full screen, give the command to send to printer from notepad++. I guess it reads ALT + TAB, CTRL + P, ALT + SHIFT, etc. and i can't capture all the bytes from the barcode. I tried to capture the event on textbox KeyPress method with e.handled = True and e.keyChar added to the bytes()
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CD Collection Prevent User For Duplication
Nov 12, 2011I'm writing a program on CD Collection. My problem is write a code that prevents a user to enter a CD collection name that is already stored in the filename.txt.
The rest of my program is okay, but the only problem is something do with btnAdd control.
Here's my whole program:
Option Explicit On
Option Strict On
Option Infer Off
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Prevent A Form From Being Resized By The User?
Jul 13, 2009i have a form that needs to be maximized in vb.net. i dont want the user to be able to change its size or move it around.
View 5 RepliesPrevent User Closing A Process?
Oct 29, 2011I am writing an application that needs to be running all the time and I don't want the user to be able to close it. I don't want to hide the process from Task Manager. All I need is that when the user tries to terminate the process, he has to enter a password.
View 9 RepliesPrevent User From Moving Form
Jan 7, 2009I have the following settings:
ControlBox : False
WindowState: Maximized
Because I want the user to have a full screen application that they cannot close without using my Exit menu. The problem is, they can simply grab the title bar of the form and drag it, exposing the desktop!
Prevent User From Using Certain Chars In Textbox
Apr 29, 2010I have a Textbox in which the user types in a name for a folder to be created. However, Windows does not allow the followin chars:
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Prevent User Order Column
May 27, 2009i want prevent user order column.i have a datagridview , it has allowuserordercolumns properties and it is set to false. But i didnt see so. i still order column.how can i prevent user ordering column.
View 6 RepliesPrevent User To Delete Files?
Sep 20, 2010can FileSystemWatcher prevent the user to delete a file ?
View 3 RepliesUnable To Use Barcode Scanner In Visual Basic 2010?
Apr 24, 2012created form with a textbox barcode scanner result in textbox1 it's worked great then i want textbox text to save in table without pressing any key how do this?
View 7 RepliesAsp.net - Prevent Multiple Logins For A Single User?
Jun 9, 2011How can I prevent a single user from logging in to my asp.net website from more than one computer at the same time?I have tried using the application server side state managenment but it is not work properly.
View 1 RepliesCode That Prevent User To Given Number Less Than 8 In The Text Box?
Sep 11, 2011what is code that prevent user to given number less than 8 in the text box. If the user give less then 8 number then message box box will appear which show Minimum Number is 8. Here is my code
Private Sub btnregister_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnregister.Click
If TELEPHONETextBox.Text.Trim.Length = 0 Then
MsgBox("Please Enter Phone Number", MsgBoxStyle.Question)
Me.TELEPHONETextBox.Focus()
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How To Prevent User From Resizing Program During Run-time
Mar 22, 2009How do I prevent the user from resizing my program during run-time? I know how to disable the max and min buttons at the top, but I can still click the edge and drag it to resize my program. I want to be able to disable this feature so my program stays the same size the whole time.
View 2 RepliesPrevent A Textbox From Receiving User Input?
May 5, 2010Preferably without turning the "Enabled" property to false, because I still need to output text from it.
I made a custom control in which there is a textbox but I want it used only as an output control, for showing text and stuff. Problem is that as soon as my form opens up the focus is turned to the textbox and I cannot catch my keyboard events on the form anymore(since the other controls are pictureboxes). I need a way to make this box "unclickable" or any way in which it is impossible to attribute the focus.[url]...
Prevent A User From Opening More Than One Form At A Time?
Mar 15, 2012I have developed an application in VB.NET. It has 20 forms. All 20 can be opened from a menu strip control. The user should be able to open only one form at a time. How might
View 3 RepliesPrevent Duplicate Values Entered By User?
Feb 10, 2012How do I prevent users from a inserting a duplicate value using SQL Query
datatype is VarChar(50)
e.g. the name field has already been defined as "Josh", I don't want it to be able to add another "Josh"
Prevent User From Click Checkbox On Listview?
May 27, 2012Private Sub lv_main_ItemCheck(ByVal sender As Object, ByVal e As System.Windows.Forms.ItemCheckEventArgs) Handles lv_main.ItemCheck
e.NewValue = e.CurrentValue
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Prevent User From Entering Numbers Or Other Characters Such As $%
Nov 22, 2009i want to prevent users from entering numbers and other characters such as (_,"*&^$#).... into my textbox-u know what i mean! I want my textbox to accept only alphabets. I have written a function that is able to check the numbers but i don't know how to check whether the text contains those special characters. Here is my code for the numbers. i'm sure, just as i'm able to check the numbers. i'll be able to check for those characters.
Public Function ValidateText(ByVal GetString As String) As Boolean
Dim Count As Integer = GetString.Length
Dim i As Integer
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VS 2008 Prevent The User From Entering Record?
Jun 29, 2010 I am using a database (access) were i am not using a primary key field. I would like to prevent the user from entering records , if certain fields allready exsists.
I would like to check for 3 of the fields. When these 3 fields has been filled previously with the same data as the new data, i want to return a message.
I am looking at the fields txtWeeknumber.text & txtTopic.text & txtSubOutCome.text
Here are some of my
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