Make A Text-box Accept Only Numeric Characters?
Apr 28, 2011How to make a text-box accept only numeric characters (0-9) ? and give an error Message if it contains any alphabets or symbols.
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How To Make Textbox Accept Only Latin Characters And Numbers
Dec 11, 2011How Can I make TextBox accept only Latin characters and numbers.?
View 9 RepliesConverting Text Containing Alpha-numeric & Special Characters To String Of Only Capital Letters And Numbers
Nov 19, 2011I have encrypted a string to something like this:
1. Asak2$)kla1015QAXKFskfa332aSJ2(Ska@Skljcmcel3p.lq,aowpqaskla2@)Skx.:Pdm^),dfs;
what i want to is convert this string to something like this
2. JXK2LB AP2WXB S1P0XE ZXPA3H X1LAKW DOXPS3
both 1 & 2 the above strings are fictitious (i made them up to make my point clear)
I am trying to make a licensing system for my VB 2010 express application. (2) above will act as a serial key which can be derived from (1) which is an encrypted form of something unique of the client computer.
I will then confirm the (2) from the client.
Create A Calculator, Which Can Accept Numeric Keyboard?
May 2, 2010I am trying to create a calculator, which can accept numeric keyboard imput, as well as button clicks, and display the number in a label.
Why does the numeric keyboard input work in this instance
Public Class Form1
Sub Form1_KeyPress(ByVal sender As Object, _
ByVal e As KeyPressEventArgs) Handles Me.KeyPress
[Code].....
Even if I press a keyboard number before pressing the button(so there is no need to clear the label if the button is pressed first etc), the number is not displayed in the label. And even if I completely comment out the code for the button-click, the keypress event still does not display the number in the label. It is as if just having the code for the button completely disables the keypress.
Setting A Textbox To Only Accept Numeric Values?
Dec 9, 2010I am looking into data validation as I need a way of setting a textbox to only accept numeric values. I have had a search for this and it doesn't seem as straight forward as I had hoped.
I have found a couple of possible methods, although the sites which I found them where very unclear on how they actually work. I feel strongly that I should know how all of my own programs work >_>
I have no actually got this to work with my program yet. Are there better methods than this?
Private Sub TextBox1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox1.KeyPress
Dim allowedChars As String = "0123456789$,"
[Code].....
Forms :: Textbox Only Accept Certain Characters?
Jul 9, 2009How can I make a text box only accept certain characters?
View 2 RepliesIs There A Numeric Text Box Not An Up-down Box A SIMPLE Numeric Box Into Which The User Can Place A Number
Apr 6, 2012Is there a numeric text box, not an up-down box, a SIMPLE numeric box into which the user can place a number, 5 boxes actually, then on command have the five boxes added and the sum displayed?
View 8 RepliesAccept Only Alphabet And Numbers. No Special Characters?
Jun 2, 2011how to validate a text box to accept only alphabets and numbers. no special characters. in vb.net i have tried the following code but it doesn't allow numbers but it allows alphabets only
Private Sub TextBox2_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox2.KeyPress
If (Microsoft.VisualBasic.Asc(e.KeyChar) < 65) _
Or (Microsoft.VisualBasic.Asc(e.KeyChar) > 90) _
And (Microsoft.VisualBasic.Asc(e.KeyChar) < 97) _
[code]....
Make First 60 Characters In A Rich Text Box A Different Color Than The Remaining Text?
Feb 7, 2009is it possible to make first 60 characters in a rich text box a different color than the remaining text?
View 25 RepliesRegex - Three Non Numeric Characters?
May 8, 2012I want to check if a Vb.net string contains at least 3 non white space characters of which at least one non numeric character. i dont know creating the regular expression for it?
[code]...
Way To Disable Numeric Characters
Nov 11, 2009Well, it's really my first time to try Visual Basic .NET, then I realized that not all my previous experience with VB6 will work smoothly in VB.NET. I am creating a simple program that will enter a name in the TextBox and will greet them by using the MessageBox class. But I wonder, since the TextBox that I'll be using is for inputting a name, I want to "trap" all numeric keys in my keyboard, I just don't know how to do it. This is fair easy in VB6, using the Text1_KeyPress(KeyAscii As Integer) subroutine.
View 4 RepliesCheck If A String Contains Characters Other Than Numeric?
Jul 7, 2009is there a way to check if a string contains characters other than numeric? ive used isnumeric quite a bit and its pretty usefull, but cant find a way to check for text in a string. Having searched around theres a few ways of doing it slowly that ive found using an array of letters and a loop / instring, but thats much more hassle than checking for numbers, so strikes me there must be a way.
[Code]...
Format A Variable To Numeric Characters?
May 20, 2009how do i format a variable at runtime.
Here is my code
string cool = // some numeric value e.g. 500000
Label2.Text = " Payment of £ " + cool ;
[code].....
Highlight Numeric Characters In A Maskedtextbox?
Apr 14, 2011I am using a masked text box to allow users to enter a serial number. The problem is that this serial number has to be communicated over the phone and people seem to be having trouble differentiating between O and 0 and I and 1.
I thought that a good solution to this might be some way of highlighting which characters in the textbox were numeric characters (as opposed to alphabetic characters). Obviously there is no way to do this without using a richtextbox and then I lose the masking ability. Highlight numeric characters in a maskedtextbox?
.net - Outlook Is Unable To Accept French-accented Characters In Mailto String?
Nov 10, 2009Outlook is causing some problems when being passed a mailto string with accented characters in it. Changing the codepage for my entire webpage that has this string on it solves this problem, but that causes other problems in the system, so I would not like to do that.
A string like such returns a lot of garbage characters:
"mailto:Helpdesk-someemail@email.com?subject=Mon bâtiment / Départementé / Bureau n'est pas répertorié"
Meanwhile, this cuts off the character after the "D"
"mailto:someemail@email.com?subject=Mon bâtiment / Départementé / Bureau n'est pas répertorié"
Search A String For Numeric Type Characters?
Aug 17, 2010how to search a string for numeric type characters and return only the numeric characters to an int field? For example: A field contains a string of "Net 30 days" or "Net 10 days" etc. I want to return only the "30" or "10" or whatever # to a int field.
View 17 RepliesGet The App To Accept Numeric And Operator Input While Ignoring All The Alpha Input?
May 10, 2010I 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
[code]....
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?
Regular Expression - Don't Allow Alphabetical Characters - Only Numeric For IP Address
Jul 15, 2011The regex statement below is being used to valid user input for an IP Address.
I want to disallow the ability of a user to type in a domain name (can'tDoThis.com)
How would I change the following statement to NOT allow a user to type in alpha characters.
Dim ipPattern As String = "((2[0-4]d|25[0-5]|[01]?dd?).){3}(2[0-4]d|25[0-5]|[01]?dd?)"
VS 2008 - Textbox Validation For Numeric And Length (7 Characters)
Oct 20, 2009I validate TextBox for numeric and length no more then 7 characters. I'm checking for Not IsNumber and Len. But I want to give a user to save record when TextBox is blank.
View 12 RepliesVS 2008 Function To Validate String - Only Numeric Characters?
May 9, 2009is there any function to validate if a string has only numerical characters? I can cross character for character and verify if it is a number. But I look for something simpler or if already a function like that exists.
I cannot use IsNumeric or IsDigit because it returns numbers to True with point or comma.
I need only numeric characters (no comma nor points
.net - Setting Textbox So User Cannot Type In Non Numeric Characters Or Spaces?
Apr 19, 2012Is there a way to set a textbox in vb such that it does not accept a space or a non-numeric character entered by a user? I am writing a program that has a textbox called "phoneField" in which the user should type in only numbers and if the user trys to type a non-numeric character or space, nothing should be displayed in the textbox. How could that be done?
View 3 RepliesGenerate Random Alpha-Numeric String 18 Characters Long
Jan 12, 2009I nedd some help in generating a random alph-numeric password for a form that I building. The form should suggest a password that 18 characters long. The user would either agree to this password or enter their own password.[code]When I use this I get a two digit number.
View 5 RepliesUse MODI OCR To Process Checkboxes (non Alpha Non Numeric Characters/items)?
Mar 27, 2012I have a vb.net application successfully processing the text in TIF files, but it is ignoring the checkboxes. Is there anyway to use MODI to process anything within the file that is not text? Such as a mark that a person has made with a pen inside a checkbox? I think I would need to be able to evaluate where the pixels are. This is for a zero budget personal project.
View 1 RepliesVS 2010 Turn Only Selected Characters Into Password Characters And Still Be Able To Get The Password Text From The Text Property?
Apr 13, 2011I'm making a custom control suited for handling passwords. I have created a control that inherits from a text box and I have implemented a lot of things so far. But what i want to do now is create a system so that when a user types It will display his last character typed for a X amount of time.Is there a way to turn only selected characters into password characters and still be able to get the password text from the Text property ?
View 3 RepliesCalculate Characters In One Row On Special Defined Numeric Value To Each Character Or Group Of Character?
Aug 25, 2011How do I write an expression to calculate all characters of each row by my own defined value to each character = all the A and B and C and etc. will be as 2 and all I and J and whatever ... will be 1 so I need an end result of the total.
View 3 RepliesVS 2010 Palindrome - Minimum Number Of Characters To Make A Text Palindrome?
Apr 17, 2012I'm having a very difficult task here. I need to analyze a certain text and find the minimum number of characters it needs to become a palindrome. The text will not have any special characters or numbers, just alphabet letters. Now, I've made some progression and have tried a lot of situations correctly, but in some situations I've gotten wrong outputs on the MINIMUM number of characters needed. I've tested the below texts:
View 2 RepliesHow To Make A Program Which Can Accept Switches Like Cmd.exe / K Or / C
Sep 24, 2010I am trying to figure out how to make a program which can accept switches like cmd.exe /k or /c basically i want it to accept commands by myapp.exe /c mycommand.i tried searching and googling but no luck. Also is there a way to run a function like that? And if anyone is wondering why then basically i am copying a script to my domain computer and executing it. This i already have done but problem is its just getting too much copyin multiple scripts and executing i would put everything in on and run em by switches.
View 2 RepliesHow To Make Textbox To Accept Only String
Jun 7, 2010How should i make a textbox to accept only string? And if there is error to appear the Error Provider. I have fixed it for the integer, but it doesnt work in string.
View 1 RepliesMake .net Command-line Exe Accept Img%03d.png?
Oct 17, 2011Command line programs like ffmpeg.exe accept a parameter like so: c:> ffmpeg.exe -i img%03d.png img.gif This will grab all these images in the directory and use them inside the program:
[Code]....
Is there a clever way to implement this in my VB.net command line project, or do I have to parse the argument for the %0?
Make A Controlbox Accept The Backspace Key?
Oct 5, 2009I am trying to make a textbox accept on the numbers 1-4 & the backspace key. The numbers part is working fine, but it will not delete the number once it's inputted into the box using backspace. Here's my existing code:
Private Sub txtCode_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles txtCode.KeyPress 'allows the textbox to only accept 1-4 & backspace If (e.KeyChar < "1" OrElse e.KeyChar > "4" _ AndAlso e.KeyChar = vbBack) Then e.Handled = True End