Make An Input Box Value Required?

Mar 30, 2010

Is there a way to make an input box value required? I have an input box that assigns the value to a label on my form, and I would like to know if you can prevent the user from leaving it blank and instead require a value?


Make A Control Required To Put Input Depending On The Radiobuttonlist Selection?

Dec 24, 2010

How can i make a control required to put input depending on the radiobuttonlist selection?

Let me try to clarify a bit more. I got 2 radiobuttons, if one gets selected, nothing else has to be done.

But if the otherone gets selected, a textfield must have some input too.

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Apr 8, 2011

I have a class set up to hold values on a registration form (VB.NET, MVC), and among the properties is a Password property:


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Make VB Code To Take Apart A Word To Make Sure It Has Required Letters?

Sep 10, 2010

I've been looking through the book I own and I've been looking online but I just don't understand what code would I write to have it check the text box or input box for the right letters in a word?

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Textbox Validation - 'REQUIRED" Property Or Control That Allow You To Make A Textbox A "required" Field?

Jul 18, 2011

Does vb 2010 have a 'REQUIRED" property or control that allow you to make a textbox a "required" field?  I googled and saw something about required property in controls in toolbox but somehow I could not find it anywhere in my vb 2010 toolbox. Would it be easier to write it?  Does anyone have sample code?

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Make Combobox And Textbox Be A Required Field?

May 6, 2011

I have 5 combobox and they are required. I would like the user to put input or select the combobox. If no input, msgbox comes up then he has to insert input or click on a custom cancel button i have made.

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Make Field Required Depending On Another Text Box?

May 28, 2010

I have 2 text boxes one for email and one for Name. If text is entered in email I want to make Name required field. How can I do this using .net validation controls?

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Make Property Required / Catch At Compile Time?

Sep 2, 2011

[code] i get an app error when running the app, because i didn't set the ID.I was wondering if there's a way to make sure the programmer assigns all properties in the class,and fail at COMPILE TIME rather than have to catch the error at runtime...

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Alter Table - Make Existing Field "REQUIRED"?

Jun 10, 2011

I have a VB.Net application that is using an Accss 2003 Database (Design Master) and I'd like to run an SQL  Transact command to make an existing text field requried. So far I have tried the following and both appear to give an error and do not make my field "Required" (IS NOT NULL).


simple method to make an existing Access 2003 Table field required?

PS: I will be running a query to make all row entries that have a null in the LeadSource field equal to "Unknown" before I ALTER TABLE?

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Make Input Box Function?

Oct 26, 2010

Am using An inputbox in my form.If i Press OK the code is fine.When i Press cancel the Program displayin an error. Wat should i Do ?

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Make Sure One Input Is Always Bigger Than The Other

Oct 29, 2009

I would like to know how to make my l(length) always bigger than w(width).eg: message box "Make Length bigger than width" and the 2 inputs, and 3 outputs = [blank]

Public Class Form1 Dim min, max As Integer Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click


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How To Make Sure That User Input Is Numeric

Sep 29, 2010

I am writing a small program here and this i=code is straight out a book and it doesn't seem to work. Its supposed to ensure that the users input is numeric and not contain letters.

Module Module1
Sub Main()
Dim user_Input As Single
Dim H As Single
Console.Write("Enter you'r Height in Meters: ")
user_Input = Console.ReadLine
Loop Until IsNumeric(user_Input)
H = CSng(user_Input)
Console.WriteLine("You are {0} meters tall", H)
End Sub
End Module

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Make A Condition If The Textbox Has An Input In It Or None?

Mar 13, 2012

Is there any way to get me a condition like this? If textbox1 (has string or integer inside) then how to make a condition if the textbox has an input in it or none?

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Make An Application Where Input 2 Numbers?

Nov 24, 2010

I'm trying to catch up on my school work and for my evaluation I need to make an application where you input 2 numbers. We will call them x and y.

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VS 2008 Make A Webcam Input?

Jul 14, 2010

Is it posseble to make a webcam input?I dont have a webcam, but i have some orc and simular programs that requires a webcam (I cant change the programs to take another input)I was thinking on that i maby culd make a "fake" webcam input that was playing a movie file.

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How To Make VB2010 Take A Simple Keyboard Input

May 22, 2011

I used to program in BASIC, and am trying to learn VB now. What I am trying to do at the moment is take a keystroke on the numeric keypad (1-9 only) and pass it into my program to control what happens to a number as follows:[code]I can't seem to find anything in VB that allows simple keyboard entry in this manner.

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Make A Program That Will Take 2 Numbers Input By The User?

Jan 21, 2010

I am new to VB.Net and programming all together. I am trying to make a program that will take 2 numbers input by the user, Add them together and display the sum. Then take the sum and divide it individually by each number to give you what percent of the sum the numbers are. I'm working on making it a program that will calculate the Hardy-Weinberg equilibrium for my Anthro Class. I'm just doing this for practice for my VB.Net Class. But i will move onto that at a later time. I just want to finish this first.

So.. Here is my code so far. It's not complete yet but this is should be enough to make it function.


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Make A Program Whereby The Input Affects A Variable?

Jun 14, 2011

I've tried to make a program whereby the input affects a variable.

If Label1.Text = "1" Then
store.number1 += 1
End If


I was just wondering if anyone knew of a better way of doing this, as I have to go up to 6 labels, each containing 100 numbers.

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Make Error Message Appear If Input Is Wrong

Sep 15, 2011

my program creates an error code when i enter the worng data but is only does it once, what code do i use to make it stop you until you enter the corrct data

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Take User Input And Make A Very Simple Bar Graph From It?

Jun 7, 2009

i need to take user input and make a very simple bar graph from it in

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Use To Make The 1st Letter Of The Input Users Name Is Capitalised?

May 30, 2011

wondering what i should use to make the 1st letter of the input users name is Capitalised.

so textbox 1 they would enter - josh and when its shown in any labels is shows - Josh

would ucase be used here ? im not sure.

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VS 2008 : Make A GUI That Can Input Data Into An Exe That Is Already Made?

May 13, 2009

I am trying to make a GUI that can input data into an exe that is already made.

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How To Make A Program In Which The User Can Input A Mathematical Function

Mar 29, 2009

i want to make a program in which the user can input a mathematical function so the program can then work with it. So the user would input something like x^4+x+2 and then an x and the program would calculate f(x). What i don't know is how to let the user input the function.

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IDE :: How To Make Column In Table To Accept Only 2 Types Of Input

Aug 17, 2009

I am having a problem on setting the SQL CE table column a field type. What field type does a column that only accepts only two inputs..
Example: If a table has a column named should only accepts two types of Make or Female.

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Make A Form That Takes User Input 3 Times?

Nov 6, 2010

I'm trying to make a form that takes user input 3 times, and each time compares it to the correct Answer... which is an array of {"C", "D", "A"}.Each time the user's input matches the correct answer ("strCorrectAnswer()"), then I'll add 1 point to intUserScoreCounter. I'm wondering why this code is returning an error (hilighted in blue)? Can I not compare a String to an Array?

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnEnterAnswers.Click
'Handles Enter Answers functionality
Dim strCorrectAnswer() As String = {"C", "D", "A"}


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Make A Main Menu Which Accepts User Input?

Jul 5, 2011

I'm trying to make a main menu which accepts user input and then checks inputted password for validity against passwords I hardcoded into an array. Firstly, in the for loop, only the first password index is being checked. I'd like the inputted password to be checked against EACH password inside the ValidPasswords() array.

Second, My for loop isn't doing what I want it to do. I'd like to give the user 3 chances to enter a password... If he/she exceeds 3, it tells them they've tried 3 times and exits the form. Right now, it just loops 3 times and exits without giving the user a chance to try again. If I put a return statement in, it just keeps returning and doesn't loop 3 times.

Public Class frmMain
Dim ValidPasswords() = {"1234", "2222", "8918", "9911"}
'Dim ValidPWList As New List(Of String)


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Make One List Box Dependent On The Other Based On User Input?

Nov 5, 2011

Is there a way to make one list box dependent on the other based on user input. Here's my situation: A teacher has the ability to enter the name of the student into a listbox via a textbox. The teacher may then select the student from the first student list box and input grades that would go into a grade listbox. If the teacher selects another student from the student list box, the grade listbox would either go empty or show the grades inputed for the other student; all the while retaining all previously recorded grades for other students.

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Make Visual Basic Wait For User Input?

Apr 16, 2011

how to code a function that causes a function to pause until the user either changes a radiobutton or hits the reset button or that will restart the function if one of the entered txt values or comboboxes Index have been changed and the uptade button is clicked.

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Make A Button That Runs An Action With The Frequency From An Number Input?

Apr 16, 2009

I want to make an button that runs an action with the frequency from an number input in Visual Basic .NET . How do I do it? Could someone point me out the syntax of such an action?and all that I want to do is use an number from "NumericUpDown" to give a button how many times the action the button has to do it.

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Make A Combobox Only List Based On User's Input Via Autocomplete?

Aug 3, 2010

How to make a combobox only list based on user's input via autocomplete?For example, if user input "A" the combobox only lists all names start letter "A".If user input "AM" the combobox only lists all names start first two letter as "AM" and so on.

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Make Program That Input Data And Update, Delete Records From Access7?

Sep 17, 2011

I have widows7 on my dell notebook than tried to make my personal program on vb 2008

I wand to make program that i can input data and update, delete records from access7

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Check VB, Console Application, User Input To Make Sure They Entered A Valid Number?

Feb 2, 2012

Vb is not my language of choice , but I have to do this for school and I'm not having a very easy time with VB's documentation.I'm just creating a very simple console application that accepts user input: degrees in Celsius, and converts it into Fahrenheit. I want to make sure that if the user just hits enter without entering the degrees in Celsius, then an if else statement will catch and write to enter Celsius again.Here's what I've tried:


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VS 2010 - Input Validation To Verify User Selected Input For 'cb Length Of Stay'

Jan 15, 2011

I need some help with the input validation of my application. Attached is the code that I have written as well as a screenshot of the front end. I specifically need input validation to verify that the user selected input for cbLengthOfStay is a number between 1-10 as well as input validation to verify the user input for txtMedication, txtSurgicalCharges, txtLabFees and txtRehabilitation is a positive numerical number. Please feel free to critique my attached code. [Code]

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VB 2008 Check For Data And Make The Program Stay There Until The Data Is Input?

Aug 3, 2010

I have a program for school project that has input fields for Name, Address, City, State and Zip. I need to error check so that the fields are not empty.I have used If statements that check to see if the fields are empty and shows a message box if they are but if I leave the whole form empty and click the button that activates it, all the if statements go- one by one instead of pausing for the user to input the required data.How do I check for data and make the program stay there until the data is input? I have tried TRY/CATCH but it won't catch this type of error.

this is the

'This program computes customer's bills at the pizza shop for all combinations of
'crusts, toppings, sizes and discounts
Option Strict On
Public Class PizzaForm


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Creating User Input With Textbox.text Input Then Displaying In Messagebox?

Feb 19, 2012

If my Category and Forum selection is incorrect I am sorry and feel free to move it. I'd like to have the users input in the message box that will show. For example: There is a textbox and the user puts in their name as Bob. Then the message box would be: What my main goal is, is being able to include the users input they type inside the textbox inside the message box.

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VS 2005 - Login Failed - Input Valid Username And Password In Form Textbox To Input Strings In Php

Sep 25, 2010

I have a problem with the code, I have input the valid username and password in the form textbox to input the strings in php, but it keep displaying the messagebox that says login failed.

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
MessageBox.Show("Please enter your username")
ElseIf Textbox2.Text = Nothing Then
MessageBox.Show("Please enter your password")


I don't really know why it keep displaying the messagebox that says it failed when I have input the valid strings in the first place.

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VS 2010 : Make The Combobox Get Data From One Table And Input It To Another Table?

Jul 7, 2011

I have 1 access database with 3 tables How do I make the combobox get data from one table and input it to another table?ex.I have a table with all my Carriers and another table with jobs that are assigned to Carriers?

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Get The App To Accept Numeric And Operator Input While Ignoring All The Alpha Input?

May 10, 2010

I am writing a calculator app in VB Express 2008.  I'm trying to get the app to accept numeric and operator input while ignoring all the alpha input.  In other words taking input from the numeric  keypad and the top of the keyboard and ignoring all the letters.

Here's the block of code I have so far:

Private Sub TextBox1_KeyDown(ByVal sender As System.Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles TextBox1.KeyDown
If (e.KeyCode >= Keys.D0 OrElse e.KeyCode >= Keys.NumPad0) And (e.KeyCode <= Keys.D9 OrElse e.KeyCode <= Keys.NumPad9) Then
Select Case e.KeyCode


I can't get vb to recognize the above code it seems to skip right over it. BTW, is 'Keys.Crsel' the same as the caret '^' symbol?

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Make A VU Meter For Audio To Monitor Audio Input?

Feb 26, 2007

make a VU meter for Audio to monitor audio input devices volume level such as microphone and etc?

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Input - DataGridViewTextBoxColumn - Column Should Not Accept Input Of Data

Jul 29, 2009

On geting input into DataGridViewTextBoxColumn but the column should not accept input of data that is not integer like; 10003, 2.00, 1500.00

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