Checking For Entered Value - Real Number
Nov 14, 2009
Imports System.Math
Public Class Form1
Dim var_ghost As Object
Dim var_number As Double
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
[Code] .....
My question is; when you enter a variable to inputbox like "100.5" it shall return a numeric value at line1 and "100,5" too. But when I need to check for entered value is a real number or not (Look line2) CDbl("100.5") returns 1005 CDbl("100,5") returns 100,5.
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Jan 13, 2009
I have a need to verify SSN's that are entered based on a reserved range (these are used for advertising and will never become valid). The input is from a masked text box formatted as 000-00-0000. I may be wrong, but I figured the most logical method would be to remove the hyphens and convert the string to an integer, then compare the starting point and end point of the range.
'Valid SSNs
'Currently, a valid SSN cannot have an area number between 734 and 749, or above 772, the highest area number which the Social Security Administration has allocated. This should not be confused with Tax Identification Numbers which include additional area numbers.
[Code] .....
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Jun 9, 2011
I had created login form in vb.net. There are two fields username & password. I want to check username & password enter in the login form, from the first.mdf (database file). If it is correct then message is displayed. I had written code for this but I got error in the code.
The code of login form is below:
Imports System.Data.SqlClient
Imports System.Data.SqlClient.SqlConnection
Imports System.Data.SqlClient.SqlCommand
Public Class Login
Inherits System.Windows.Forms.Form
[Code] .....
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Aug 31, 2009
I have below code in vb.net.
[Code]...
I want to check at client end whether the entered date in text box is future date. I mean this textbox should allow future date only. code the above problem using jquery or vb.net
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May 25, 2012
Have a very nooby question here, textbox2 contains a number and if the number entered in textbox1 is higher than textbox2 i wish to display a message box but the following doesn't seem to be working properly?
Sometimes it lets the user enter a higher number, maybe I am doing this wrong?
Private Sub TextBox1_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox1.TextChanged
[Code]...
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Sep 16, 2011
what i want is to get the serial number of my cpu.i have used the code you give at your website,that refers at the function GetProcessorId, at 3 different pc's,where all these pc's were using cpu's of the company INTEL.so my problem is that i took the same ID from the 3 pc's i used. is there any way that will make me able to get a real serial number from a cpu,that this serial number is unique?i am using visual studio 2008.do you have something to suggest?
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Mar 6, 2011
PHP
Dim searcher As ManagementObjectSearcher = New ManagementObjectSearcher("SELECT * FROM Win32_PhysicalMedia")
For Each wmi_HD As ManagementObject In searcher.Get()
MessageBox.Show(wmi_HD("SerialNumber"))
Next
I am using this code for getting hard drive serial number its works ok with me but not working on my friends system and return an empty string.
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Oct 1, 2011
Here is the problem, I have an Access form and a textbox for an e-mail address. The email address is not required, I only want to check for a valid email address when a value or address has been entered into the e-mail filed. Example: If e-mail is not empty or if email field has a value, then check for the follow elements, matched the email address with the required format. If the e-mail field is empty, do not look for anything, move on.
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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 17, 2011
Here's my
Module Module1
Dim Board(3, 3) As Char
Dim PlayerOneName As String
Dim PlayerTwoName As String
Dim PlayerOneScore As Single
[Code] .....
How can I make it come up with no error when no coordinate has been entered, basically instead of a number being enter, the return key is just pressed.
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Jul 1, 2010
how to create number of labels entered in a textbox.
I mean if textbox.text = 3, then three labels will be created programatically.
Of it is more or less, the exact no. of labels has to be created.
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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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Sep 20, 2009
I have made an countdown app that is working in a normal way (added picture of it). Now when I select a number in the numeric box and click start, it starts to count down from that many minutes, but what I want is the number I put in the box *3. So if I put in 3 (points) the counter will count down 9 minutes. If it is possible I want a counter at the bottom every 3 minutes the value of the 000 at the bottom of the image multiply by 1 (+1 for every 3 mins timer1 runs).
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Nov 15, 2009
I am trying to program the hamming code in vb... theoretically i understand and know how to do everything, first problem I've encountered is dynamic arrays in vb.net ... is it possible to determine the length of an array from the number of items entered in it, since I have no means of figuring out an exact number or length prior to several mathematical function which outcome will be the data .. directly saved to the array !!
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May 11, 2009
I have designed a form with textboxes for numerical entry. I need to validate each textbox so the number entered is an integer, and is between 0-1000. I am struggling to find how to validate the data entry.
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Jul 18, 2011
Simple code! where am I going wrong. I get end of statement expected in line 4 after valid.
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
If valid('0') Is True Then msgbox("HI")
End If
[code].....
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Aug 15, 2011
with a code that can detect when a pin number is entered in reverse. and alerts the user that he has entered pin number in reverse
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Jan 8, 2012
i want to know the code for an average of numbers from 1 to a number entered?
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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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Feb 24, 2010
I have a UI that uses datagridviews / bindingsource / datatables of typed dataset for data entry. The dataset itself is serialized to a varbinary(max) in SQL. (i.e. no tableadapter, backend schema).I would like to limit the number of rows the user can enter into some of the grids (the data is used to fill PDF forms and I don't want them entering more rows than the forms can accomodate.).I have subclassed the datagridview, added a rowlimit property and tried to manipulate the AllUsertoAddRows property
Imports System.Windows.Forms
Public Class dgv
Inherits System.Windows.Forms.DataGridView[code]......
The behavior I see is that the messagebox comes up after leaving the max row even when the user is trying to leave the grid. I can lose the messagebox and deal with notification some other way but I thought someone else may have come up with something a little more sophisticated to handle simply causing attempting to add to many records to navigate out of the grid to the next UI control.
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Dec 13, 2010
How to count no. of characters entered in multiline textbox, i wanna enter maximum 140 characters in my multiline textbox using vb.net ...
In short i want textbox to enter limit is only 140 characters .[code]...
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Nov 1, 2011
I need to display a grade based on the number of points entered. store the min and grade in a 2d array here's my code that I have currently:
Dim strGrade(,) As String = {{"0", "F"},
{"300", "D"},
{"350", "C"},
[code]....
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Jun 13, 2011
I have to write a program that does a count down on the number of seconds you entered in the GUI I have most of the code and it basically has to countdown the seconds i type in the txtStart. Attached is the program design..This is what i have so far with the code. It converts seconds to hours and minutes and seconds, but it doesn't do the countdown.[code]
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Nov 13, 2011
the task is to have an image move up and down when a number is entered in the text box and the start button pressed. now ive managed to get the image to move up but not to sure how id get it to go back down.the code ive used so far is
Private Sub btnJump_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnJump.Click
While picFrog.Top > 0
picFrog.Top = picFrog.Top - Val(txtSpeed.Text)
[code]....
but it comes up with a error. can someone point me in the right direction of what kind of code i should be using?
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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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Oct 13, 2010
I have this:
dim nmbToCheck as Double = 15.22
dim nmb1 as Double = 12
dim nmb2 as double = 18
How do I check wheter nmbToCheck is between nmb1 and nmb2? I know I could use < and >, but the problem is that I won't be knowing which of the numbers will be smaller, and which will be larger, and it seems like a lot of code to write for such a small issue. There must be some sort of nmbToCheck.IsBetween(nmb1, nmb2) type solution to this, right?
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Jun 21, 2010
[Code] What I'm having trouble with is that the numbers MUST be unique. So, only one 1, one 3, one 5, one 7. So I have it go through the second statements to randomize the object again if it's the same, but after it randomizes, I kind of need it to go back to the top to see if the number is even again.
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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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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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Dec 4, 2009
I have an array for all 26 chars of the alphabet as a boolean. What I want to end up doing is have the program take the user's guess char and set the corresponding number in the array to true. I'm new to arrays and I have no clue how to begin doing this. this is how I am declaring my array. I am declaring the array as a char for now because I don't know how to go about using a boolean array for my game, but it seems like it would be the best way to do it. [Code]
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