ATM System - Check Card Number Matches Up To The Users PIN Number
Mar 13, 2009
I am trying to make a basic ATM system, iv got all the interface done and I have made the link to my SQL database etc. the part i'm stuck on is how I can run a check to see if a bank card number matches up to the users PIN number. To simulate the user putting a card into the machine I've used a combo box, and that lists all the cards, that haven't been flagged as confiscated (there's a column in my ATMCards table that I can set to true or false) then after the user has selected a relevant card there's another text box where they can enter in their PIN number.
Now what I want to do is, if they chose the card number 1234567890123456 in the combo box and they enter in the PIN 1234 into the text box, then, after clicking the check PIN Button if the pin is correct they need to be taken to another from where they can check their balance etc., and if its wrong they got three attempts after which point i want to flag that card as confiscated.
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Dec 10, 2010
I got most part correctly but the only part isnt working right is when the last 5th digit match the sum number at the last number.
Private Sub btnVerify_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnVerify.Click
Dim strCardNum As String
Dim strSumNum As String
[CODE]...
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Feb 6, 2012
I have a vb application sitting on sql 2005 database i want a scenario where the application can check the number of records inserted into a particular table(Users) , if the number of records inserted into that table after 1wk since the last insert is less than 100 records it should pop up a warning alert with the total number of records
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Mar 3, 2010
I am trying to filter a dataset using a number different inputs, selected by a number of check boxes. I have all the text base rowfilters working, but I can not make the date filter work unless I hard code the datetime into the code. The database is MS Access and I am using VB2008 to show the data. I would like to be able to use a DateTimePicker to set the filter date (without the time part) Also I would need to remove the time section of the datEnterDate. I cannot change the structure of the database fields. Also the datEnterDate is MM/dd/yyyy, because I'm in England I would like to use the format of dd/MM/yyyy if possible
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Jul 10, 2009
I got 2 LABELS and ONE BUTTON... when i press the button, it fills both labels with a random number from 1 - 6.ild like to do it like this... you press the button then a little prograss bar starts running for 3 or 4 seconds... and THEN after it reached the bars max i want it to show the numbers in the Labels...
the second thing is...i want to make 2 checkboxes next to the labels... if you mark the first checkbox, next to the first label... and the outcome is that the number of the first label is BIGGER then the other one.. you should get some kind of a msgbox.. i know how to make a msg box... but i dont know the code for vb to check if label1 is > or < than label2....
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Mar 24, 2010
Is there a way to check if a number in a TextBox is an even or uneven number?
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Apr 6, 2010
I just finished this application where you enter a five-digit credit card number, with the fifth digit being the check digit. everything seems to work except, I can't seem to get it to determine that any number is "valid". Every 5-digit combination that I enter returns "The credit card number is not valid". Im using visual basic 2008 express
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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)?
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Oct 8, 2008
Is there an easy way to check whether a number is a prime number? I've tried doing this:[code] url...
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Oct 12, 2010
Is there an easy way to check whether a number is a prime number? I've tried doing this:
Code:
Public Function IsPrime(ByVal Input As Integer)
Dim NewInput As Integer
[code].....
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Jan 25, 2012
I have a Credit Card Number in an XML Message and I want to use a regex to find the Credit Card Number and encrypt it. All numbers are 16 characters long and they are not always in the same place in the xml, so basically I think I just need to find a string that is 16 characters and decrypt it, but I am not sure how.
[Code]...
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Mar 4, 2011
I am doing a bar cash register and I want to use a if statement to see if fosters button and number 1 on the number pad are both pressed then multiply constant by quantity number
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Jun 27, 2009
Still working on a very simplistic poker game and I'm struggling with getting the code to show my cards in picture boxes. I currently have 12 picture boxes set up on my form and when clicking the "deal" button I created on the form, I would like a random number to be generated from 1-53 and based on the number returned I would like a picture of a playing card entered into the picturebox. I would like this to happen in 10 picture boxes. So playing cards will be shown in the picture box on 10 of them and a the card back on the picture box 11 and 12. After hitting a second button, I would like the 11th and 12th boxes to display a card from the deck.
With all that being said my questions are:
1. How do I associate the random numbers with my playing cards? (I have my card pictures in a file on my computer.)
2. How do I get the picture of the cards into the picture boxes? What would the code look like?
3. I have a button to clear all the cards, but how to I program it.
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Oct 31, 2011
I need to make a app that verifies a five digit credit card number. The check digit is 5th and is found by multiplying the 2nd and 4th digit. Heres my current
Dim strInput As String
Dim strOutput As String
Dim intSumOfDigits As Integer
[code]....
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Jul 13, 2011
i have this program which records the every printing made on a local computer.I am to record the number of pages of the document to be printed and the number of printed pages. i have this code but i don't know the number of pages and number printed pages always return 0 [Code].
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Jan 7, 2011
count the number of users used an application?
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Jun 4, 2011
I was trying to get this work, but couldn't find a way to work this out. I'm new to vb.net. In a text box, the user enters a number for example a 9 digit number. I want the user enter to enter a 9 digit number that is starting from 8. if the very first number of that set is not starting with 8 then give a error msg to the user to enter a number starting from 8.
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Jun 10, 2012
i have a program where the high scores will be saved in a txt file. of course, if the file is already in use, saving the text file won't work. is there an if statement i can do to check if it is in use? or could i check the last access time, and the last modify time and if the modify time happened after the access, i know its closed, and if the access time happened after the last modify time it is still in use?
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Jun 10, 2009
I am in the process of upgrading hardware for a significant number of users. When we upgrade them to new hardware we often upgrade a lot of their software. Once the base load of the OS is on their new machine I run a vb script that copies their profile from the old machine to the new machine and sets up a lot of the software on the new machine that we use. I am trying to migrate this application to VB.Net for a variety of reasons (speed and UI being among the biggest). There are two separate issues that I am having.
One issue is that I can't seem to find a good .Net way to query what printers and ports they have on the old machine and set those up on the new machine. I am still using script (called from VB.Net) to do this. Another issue is with CopyProfile. We have several users that have directory structures that use names longer than this utility seems to allow. Is there a better way to copy a profile from one PC to another than this utility? Is there any documentation on exactly what this utility does so I could determine if I wanted to code it myself?
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Feb 15, 2011
I'm Trying to make a piece of software where You enter a number and the computer measures the length of the number, and then generates random numbers to match the human number. It will then count the number of guesses and the time taken. However it always comes up that there was a infinite loop "An unhandled exception of type 'System.StackOverflowException' occurred in System.Windows.Forms.dll". I have searched up how to do this and I can't seem to find out how. I think I just put my wording wrong when looking it up. My Software Has Has 2 TextBox, 2 Buttons, 6 labels (4 just to make it user friendly) and a timer.
Here is the Code:
Public Class Form1
Dim TimeTaken As Integer
Dim GuessesTaken As Integer
[Code].....
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Aug 26, 2009
i have a sql table which has 2 fields number & name
1 abc
2 xyz
Situation is that the app finds out max of number and increments it by 1 to get new number.The problem is when two users enter some record sometimes two records get saved on same number.
[Code]...
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Dec 10, 2009
I need a way to find out which options of ExitWindowsEx are supported by the users system (in Form1_Load).How can I do this?
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Oct 27, 2009
I use ExitWindowsEx to shut down/reboot computers, or log off users.
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Mar 21, 2011
I have two masked text boxes that holds Phone Numbers and Zip Codes.Since they are Masked text boxes and are set not to allow characters or letters, the user must enter numbers.However, how do I add a message telling the user to enter number and zip code since there is no prompt?I don't need to validate the numbers just to add an error message if it's left empty.
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Jul 31, 2010
I've created code that generates a random number and validates the users guess to see if its correct. I think the code is good but i'm not 100% sure. I need to add additional pieces to the code and i'm not sure where or how to do it. allow the user 10 guesses. after 10 guesses disable the ability to make more guesses if the 10th guess is wrong count each guess entered & display the count as it increments display each guess along with its returned messaeg into a list box. when the user gets correct answer provide a box to allow them to play again. Re-initialize variables back to their starting status.
a. If the user correctly guesses the number in less than 5 guesses display "Either you know the secret or you got lucky!" in a message box. b. If the user correctly guesses the number in 5, 6, or 7 guesses, display "Ah Ha! Do you know the secret?" in a message box. c. If the number of guesses is 8 to 10, then display "Try to do better next time." d. If the number of guesses exceeds 10, then display "You have taken too many guesses."
[Code]...
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Jan 20, 2012
I am wanting to create a registration algorithm for my applications. I would like to generate a number/value from the users hardware/os data and then use that to create a key.
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Jun 21, 2010
I am currently creating an application to track timekeeping (a clock in/out system) and I am trying to work out the best way to do this.
I have a Main Form which contains buttons to ;
- Log in
- Out for Break
- In from Break
- Log out
When a user presses the "log in" button the logon form appears, the user then enters their username and password. What happens next is where I would like the help.
Process is as follows:Click Logon Enter Username/Password Check Logon Form for errors (eg no password etc) Check User is in Database (using SQL query) If user is in DB and username and pass are ok then refer back to the main form to perform Stored Procedure for what the user wants to do (eg logon or or out for break etc). Set label on main form to show user as logged on My question is should I be using a public variable and calling the main form again or in the user logon form having 4 options and using an IF ELSE to select the appropriate Stored Procedure?
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Jun 21, 2010
I'm reading data in from a comma-separated text file and storing the data in an array for later use. Some of the values are to remain as strings, and I need to convert some to integers, for which I was trying to use, for example, integer.parse(ar(0)).
My problem is that the string values are randomly distributed through the text file, so I need to be able to test whether the string can be converted at all before doing the conversion.
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Aug 20, 2010
I have class representing a unit of measure with a Decimal as the numeric. Just to simplify things for this example, let's say I'm representing centimeters. I'd like to implement a ToString() method for this class. The thing is, if the numeric value is a whole number I'd like to just display the decimal as an integer. Otherwise, I'd like to keep it as a decimal. So, for example, 10.5D centimeters would display as "10.5cm", but 7.0D centimeters should display as "7cm". I'd like this to be fast and simple to read. I have a working solution, but it seems like there should be a better way.Here's a contrived example showing my first crack at it:
Public Property Units As String = "cm"
Public Property NumericValue As Decimal = 10.5D
Public Overrides Function ToString()
[code].....
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Feb 5, 2006
How do you check to see if a string is a numberic value?
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