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
[Code]....
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Nov 22, 2009
i 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
[Code].....
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May 14, 2012
Is there a way to prevent a user from entering data into a ComboBox, rather then selecting, or can anyone suggest a routine to catch and prevent entries so the user can be made aware the they are not acceptable?
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Apr 4, 2011
Title pretty much says it all. Does anyone know a way to to prevent a computer from entering a low/non-processing mode while the program is running? I don't care about monitor modes, screen-savers, hard-drive spindown, etc (in fact, I'd prefer to leave those alone; I like it that it shuts the monitor off after a time period).Basically, I have an industrial program that needs to continually monitor a PCI card it uses for IO; and this activity alone isn't enough to convince Windows not to go into Sleep mode. We normally just shut the power-save features off, but we had an incident where a technician forgot, a customer's machine went to Sleep after the end of the shift, the pumps stopped recirculating, yadda-yadda big mess.
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Jul 31, 2010
I have a datagrid with 5 columns.2 of these columns will have data entered into them automatically - depending on the entries of 2 textboxes.I can disable these 2 columns ok.How can I have it so that the tab key doea not enter the cells of these 2 disabled columns. ideally I'd like the tab to enter the cells of the abled columns only.
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Mar 26, 2009
The app uses several forms to let the user enter information. In each form the info is entered into textboxes and dealt with elsewhere when the "Enter" button is clicked. A lot if the info entered is used in calculations and so must not contain alpha characters, only numbers. What is the best way of examining each entry and identifying any that are not numbers, so that I can ask the user for a correction with a MsgBox?Prevent Users Entering Letters Instead of Numbers?
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Dec 20, 2010
I have a project that uses a number of DataGridView controls. Most of the cells are of the DataGridViewTextBoxCell persuasion. I declare my controls like so:Dim MyCell as DataGridViewCell Later I specify whether they are DataGridViewTextBoxControls or DataGridViewComboBoxCells like so:
MyCell = New DataGridViewTextBoxCell MyCell = New DataGridViewComboBoxCell None of the places in my code require the ability for the users to enter their own values in the Combo Boxes. That is, they are either hard-coded or the values are gathered from other data within the application.
Currently, users can highlight a combo box control defined as shown above and begin typing anything they like. For example, I have one combo box that offers the user a selection of integers between 1 and 9. I can highlight the combo box cell and enter "Hello, World!" if I'd like.What does it take to disable this ability? I'm sure there's a property, but I have yet to find it. I have searched the Internet, and have found only the ability to have user-entered values added to the list and a stream of data-binding tutorials.
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Sep 18, 2010
I don't want to delete the contents i just want after the first insert to make combo box showing nothing..but when i will click i wanna see the list of items that it has!!!
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Aug 6, 2010
When I create a new record by submitting an .aspx page the new record is not showing up. I have to navigate away from the page and back to it for the new data to show.
How do I refresh the data up reload??
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Apr 26, 2009
A] Is there any way of stopping a user from entering text or changing text in a textbox without disabling it or
B] Is there a way of changing the texboxes back and fore color whilst it is disabled?
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Jun 6, 2011
How do i disable user from goto desktop and when they press Control+Alt+Del it must prompt with admin username/Password.Is it possible to do....i have created a login page but i have no idea on how to make it prompt when user press Control+Alt+Del
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Mar 20, 2009
i want to develop a billing software for my net cafe. how to lock the computer before a user entering their name in my Login form?after they entered their name, this form will insert a new data in userLogin table (user_login_name and login_time), and the computer will be available to use.
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Aug 2, 2010
How Can i prevent duplicate record entry in vb.net.
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May 3, 2010
have 4 worksheets, need to enabel user to open any 1 by entering date which is name of worksheet?
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Mar 9, 2012
I need to write a code to stop user from entering a duplicate course Id and I am having trouble.[code]
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Mar 13, 2010
I have created an application which asks the user to enter password to login.Now how can i inform the user(if his caps button is on) that his caps button is on while he is entering his password?
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Oct 27, 2009
I am handling many of the BindingNavigator tasks (MoveFirst, MoveNext, etc.)in code to ensure that I always ask the User to save his changes.
The one area I am have a problem is PositionItem. I would like to sense that the User has changed the Record Number in the BindingNavigatorPositionItem, handle my record Update, and move to the Record Number the User entered I have looked all over and have not found any way to do this.
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May 26, 2011
i have this code to open a record and this working if there is any, but if no records it will come out with error
[Code]...
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Nov 12, 2011
I'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
[Code].....
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Jul 13, 2009
i 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.
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Oct 29, 2011
I 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.
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Jan 7, 2009
I 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!
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Apr 29, 2010
I 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:
[Code]...
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May 27, 2009
i 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.
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Sep 20, 2010
can FileSystemWatcher prevent the user to delete a file ?
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May 24, 2010
here is insert record coding
cn = New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|DataDirectory|hvaccine.mdb")
cn.Open()
Dim str As String
[code]....
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Jun 9, 2011
How 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.
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Sep 11, 2011
what 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()
[code].....
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Mar 22, 2009
How 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.
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May 5, 2010
Preferably 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]...
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