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:
[Code]...
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May 24, 2010
I created a usercontrol which has a Textbox and a Label. Setting the (boolean) textvalidity property we can toggle the icons on the label to show if the user has entered a valid input.
Sub New()
' This call is required by the Windows Form Designer.
InitializeComponent()
[Code]......
The problem is... when the control is used... the constructor initializes it to true (According to my code) so the icon is already displayed.
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Nov 18, 2009
I am trying to mkae sure that there has been 16 numeric digits entered into the masked textbox. If not show errror message and if so to call the fucnction ValidateLuhn. When calling Validate Luhn i want the program to tell me if the number entered is valid or invalid using the code in the function:
[Code]...
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May 27, 2011
How to create a console application which would read input from user and assign the input to a variable? The problem is, I need to enter several words on one line separated with blank spaces like "ab cd efg" and then assign ab to one variable, cd to another variable and efg to another variable. Also the entered words can be any lenght.
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Apr 5, 2009
When I read a value from text box I want to make sure user has entered a number(int/float/double etc.) not a string. Is there any function to check it? otherwise how do i validate it.
Language : VB.NET
Version : Visual Studio 2005
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Sep 23, 2010
Part of my assignment is to check if input to Group Number and Number of Units are correct input by making error handling exceptions...
I have to check the following:
a) group number is neither 501 nor 062
b) number of units are NOT numbers
c) number of units is NOT a positive number
So my first question is, am I checking correctly? 2nd question is, How do I make sure my Exceptions will pertain to their correct respective things (a, b, and c.. above)?
[Code]...
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Apr 8, 2012
I have a procedure at the end of my console application that ask the user to either hit enter to end the program, or type s to perform another search. The issue I'm having is no matter what the user types in the program end. What I would like to happen is if the user types s, then the program starts over and lets the user perform another search. The program is procedural and I need to find a way to start back off at the top of the program which ask the user to type a name to search.
[Code]....
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Feb 25, 2009
how to validate 4 textboxes so that only numbers 1 to 4 can be entered but no number can be repeated.i already have code but it only validates some of the boxes and allows numbers to be repeated in other
Public Class frmGrid
Private Grid() As Short
Private Const intDimension As Short = 3
[Code]....
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Oct 5, 2011
I want to check if the value in the text box is EVEN NUMBER.else throw an error mssg.
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Mar 21, 2012
I'm trying to check if the input in the "enterKey" is 1) Numeric input value, 2) Integer input value, 3) Non-negative input value, and 4) Input value less than or equal to the Maximum Score which is 10. When I enter the number 10, my error message pops up.
Here is my
If e.KeyCode = Keys.Enter Then
If (IsNumeric(txtQuizScores.Text)) _
AndAlso (CInt(txtQuizScores.Text) >= 0) _
AndAlso (CInt(txtQuizScores.Text) <= 10) _
AndAlso (CInt(txtQuizScores.Text) Mod 1 <> 0) Then
[Code] .....
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Jul 27, 2011
How can I know if I input a valid Birthday of a person in vb2005 windows base. If the user input the current date it must put a message that it is not a valid birthday.
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Feb 2, 2011
I am writing a Do Until Loop to check if the number entered in a textbox is between 1 and 12 in Visual Basic 2010.
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Sep 3, 2009
How do i check if user has entered all inputs and go to the next form.
Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
t1.Focus()
End Sub
[code]....
In this code it gives an error, but after displaying the error it jumps to next form.
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Feb 15, 2012
I am trying to draw textboxes when the user enters the amount of textboxes to be drawn on one form and the textboxes get displayed on the another form. I have found these codes online but it works with inbuilt codes I guess. That is, the number is already hard coded in the form.
[Code]...
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Oct 26, 2010
How to accept input into a vb.net console application? How Do I allow people to type into a vb.net console application, and then press enter, and then the console application writes that and uses the console.writeline function to write what the person typed in into the network stream(or whatever its called).
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Dec 30, 2011
need an example of a console application that would allow you to input data to and retrieve data from a text file on disk.
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Sep 5, 2010
I have an existing database that I want to add a number to that the user inputs. So lets say that in the database there is 4 carrots, and the user on the addinventoryform inputs 3 carrots and pushes a button. Now I want that number to be added to the database number so in the database there would now be seven carrots. I am using an oledb connection and cannot figure this out.
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Apr 15, 2012
I am doing form validation in VB, I validate the text field data by using txtName_LostFocus function, and on wrong input I used txtName.Focus(). It works well for me. But problem is that as for as, user does not input valid text, my EXIT button also does not works.
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Mar 18, 2011
I have a program that allows a user to input numbers from an inputbox and it displays the Total numbers entered, the sum of the numbers entered, and the average of the numbers entered. What I can not seem to find it how to have it display the largest number entered. The code I have so far is,
[Code]...
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Aug 26, 2009
I have a simple console application which consists of a single executable and a DLL file. My project has a reference to the DLL. My question is how do I ensure the DLL is present in the same directory and prevent the console app from crashing? Although in reality the two files will probably never be separated, I want to make sure someone can diagnose the error without me there.
At first I tried adding File.Exists(PathToDLL) at the beginning of Sub Main(). If the file wasn't found, I was going to display a message and quit the application. But apparently if the DLL is referenced at any point in the code, a System.IO.FileNotFoundException is thrown regardless if the line is executed.
Is there some way to handle this in the executable itself without creating another executable to load that one?
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Jun 21, 2010
I Create an application that when a user enters a positive integer value in a input box(the default number is 10) when the OK button is clicked, the application should display a message box with the sum of all the integers form 1 through the value entered by the user. If the user enters a negative value, the application should display an error message. I believe I have to use a loop condition but I have no idea what to do.
EX: User enters 10 in the input box once OK button is pressed a message box pops up and says "The sum of the numbers 1 through 10 is 55". Use the following test data to determine if the application is calculating properly
VALUE SUM
5 15
10 55
20 210
100 5050
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Aug 25, 2010
I have a console application, and its supposed to check if you type a certain thing, then it does it.
My code is:
Console.WriteLine("Please enter a command.")
If Console.ReadLine = "time" Then
Console.WriteLine(My.Computer.Clock.LocalTime)
[CODE].......................
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May 7, 2012
I am currently making a boggle game, I have done finished every aspect of it expect the spell check bit. I have been searching the internet fruitlessly, and have only found spellcheckers but none of the results allow the program to know the word is wrong. So what I want my program to do is after the user has pressed done or the timer runs out, it checks the items in listbox1 and if it is wrong then puts the item in listbox2.
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Nov 20, 2011
Im trying to make a Console Project that when you enter a number it changes the color of the text and its not working
[Code]...
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Feb 9, 2010
i am working on lab asssignment i need to know what im missing ? i am trying to Write a Visual Basic Console Application which inputs the month number, which i think i have right. also have to output the number of days are in that month which im completely lost on.here is what i have so far:
Module Module1
Sub Main()
Dim month As Double
[Code].....
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Feb 15, 2011
I was about to create a program about CPU Scheduling (SJF Nonpreemptive), Now, I want to ask the user to input the no. of processes ,then based from the user's input I would display exact no. of text boxes where the user could enter the value for each process then store it in an array. But I don't know how to code the text box., I'm new to VB.net and I'm used to it's 'drag and drop' nature. I just want to know how the code to output this text boxes. and is it possible to have an array of text boxes?
BtW I'm thinking of using 2 forms here
Form 1 for the USER INPUT OF THE NO. OF PROCESSES
Form 2 for the output of TEXT BOXES
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Jun 29, 2010
I'm attempting to learn VB in college. My first project is to create a program in Small Basic and then write it in Visual Basic. I'm looking for the equivalent of TextWindow.ReadNumber() from Small Basic in Visual Basic. I want to force the user to input a number not letters. I'm writing this program for the Console. Is this possible? During my testing I entered a word instead of numbers and the program crashed.
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Mar 15, 2009
We know that VB string start and end with double quotes " "
So we have to use "" if we want " in VB string.
I wonder if there is a regular expression pattern which will match VB string?.
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Apr 20, 2011
how do i check if the "game.exe" exists on the path that the user has selected?
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Jul 30, 2011
I want to create a console application with commands that can be entered by the user, but to make my application reconize those commands do I have to have an if statement for every command, or can I do something like this[code]...
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