Restrict The Numbers Entered Into A Textbox ?
Dec 5, 2010
I have a appointments program and the user must be over 18. I was wondering is there a way to restrict the numbers entered into a textbox to be from 18 to 100. can this be done with e.keychar
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Dec 5, 2010
I have a appointments program and the user must be over 18. I was wondering is there a way to restrict the numbers entered into a textbox to be from 18 to 100. can this be done with e.keychar
View 2 Replies
Feb 2, 2010
how do you restrict letters from being entered into a textbox?I know it invloves textbox_TextChanged but i don't know who to do so.
Edit: I figured out that Letters(25) = (a b c etc...) can be used but how to not enter the letter? Uhm.. Like, the user enters "a" and the program recognizes it using an IF statement. How will it NOT enter the letter into the textbox?
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May 10, 2012
[code]...how to restrict numbers for TextBox?
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Sep 8, 2009
i want to restrict input of a textbox to only numbers but am doing it on asp.net, so i cant check for each character that is being inputed cause it will cost me a post back and thus lots of time?
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Aug 7, 2010
[code].....
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Mar 11, 2012
I have a textbox where the user enters their name, however it is possible to enter numbers in textbox, i was wondering if there is a pre existing function that only allows alphabetical characters to be entered?
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Nov 15, 2009
I have a textbox which controls the interval of a Timer control. How do I filter out letters? Is it possible to restrict entry to numbers only (like if you enter a letter or a space, nothing happens)? Is there a property of the textbox that can accomplish this?
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Jan 6, 2010
I need to do a check on telephone numbers entered into a textbox.I know the regular expression for an email address but not to check a telephone number like such (000)000-0000
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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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Oct 13, 2004
I want my textbox to take only letters as Input, no numbers or other keys.
And Viceversa that I want Only numbers as Input ,no letters or other keys.
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Feb 16, 2006
I have some textboxes that I only want numbers in and only want a range of numbers to be valid. Also I do not want to use NUDs. I already have the textboxes connected to functons and subs so I do not really want to change them.How would I do this?
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Sep 20, 2009
I Have Textbox where whatever is entered is to be used for a file name so I do not want certain keys to be entered, i.e. <>|\ /*: ? "
The code I have so far is
Private Sub TextBox1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox1.KeyPress
[code].....
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Dec 15, 2007
Im trying to do a lab that will obtain 10 numbers from the user using an InputBox() function, store them internally in a one-dimensional array, and then compute the average of the numbers and sort them in reverse numerical order. The program should control that 10 numbers (no more, no less) are entered, and that the numbers are fully validated as integers.
If the user enters non-numeric data, then an appropriate error message should be shown, and that number should be allowed to be re-entered as a valid number. Then all the numbers should be shown as a list in a 'message box'. So far I can get everything but the message box to show the list of numbers entered.
[Code]...
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Dec 28, 2010
Private Sub Recipient_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles Recipient.KeyPress
If Char.IsLetter(e.KeyChar) Then[code].....
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Jul 10, 2010
I want that it is not possible to type anything in a textbox, but i do need to place something in it. This is my temporary
Private Sub textbox1_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles textbox1.TextChanged
If textbox1.Text = Nothing Then
Else
textbox1.Text = Nothing
End If
End Sub
But in this way I cant place anything either. I want only that it is not possible to type something in it.
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Jul 30, 2009
I am just wondering is there any way I could restrict entering spaces into a textbox, or how to check are there any spaces in the text? I do know how to remove them, so I would need to check or restrict
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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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Jan 16, 2010
How to create a new textbox every time previous textbox.text is entered?
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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:
Private Function ValidateLuhn(ByVal value As String) As Boolean
Dim CheckSum As Integer = 0
Dim DoubleFlag As Boolean = (value.Length Mod 2 = 0)
[CODE]...
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Aug 27, 2010
OK, every time the letter a is entered into a textbox, I want it to enter in as a 1 instead. Help?
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Apr 4, 2012
i have one more issues, and hope is the last for now. How can I limit a textboxe's input to only numerical with certain range of values (eg -10 to 10) and with that happening while I type in the values?
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Jul 30, 2009
I just D/L VB express 8, and I'm trying to learn how to use it. what I'm trying to do is write some code that:takes a number into a text box (textbox1.text)do some simple calculations with that number when I press a button (button1)display the results in a second text box 9textbox2.textThe first problem I am having:The numbers are in the "milli" range, meaning to the power of negative three, so 10^-3 = 0.01 I do not want to enter 10^-3 or any other exponent into the textbox, I am simply entering in 10 because all my units will be in milli. I've tried using exponent and scientific notation but it doesn't calculate correctly. I've done a "work around" to get it to do what I want, but there has to be a simpler way to achieve the above results without. for example, the user enters 10 into the textbox, the button multiplies 10^-3 *30, as a crude example, and stroes that value (say, B=10^-3*30) and B is DIM B as Double.
Problem number two:Error checking. I need to validate that only numbers can be entered into the textbox, or else the program will display an error message (messagebox). I can achieve this to some degree with sample code from here and other places, but, some of the code does not take into account that some numbers have decimal places (I have foud code that does, and it does work), but if a users enters, say the letter "E", it crashes the program. If the user enters "10.3Z", it crashes the program. I cannot seem to code for the last case, a mixture of numbers and letters to get an error message box.
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Jun 18, 2009
Is it possible to validate the value entered within a textbox by comparing it with a text file that is full off accepted values?
in my textbox will be a location like London, i want to be able to validate that it is correct by looking in my text file to see if it is there?
my textfile would be written like this:
|london|manchester|birmingham|leeds|bristol| ... etc so it need to split the values by looknig with the pipe characters ( | )?
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Apr 18, 2011
I am building a form and i want to prevent certain characters from being typed in a textbox? I want to disable the " and ' characters in some of my textboxes
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Nov 13, 2010
How to only check that checkbox which is entered in textbox ? If i have 4 checkboxes eith text checkbox1, checkbox2, checkbox3 and checkbox4 and 1 textbox if i type in textbox 1,2 then only checkbox1 and checkbox2 would be checked again directly after doing that i type 3,4 in textbox then only 3,4 will be checked and 1,2 will be uncheked.. remember i wanna do this coding for unlimited no. of checkboxes .. so dnt provide coding for 4 checkboxes only.
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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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Sep 14, 2009
I have a text box and I would like to type in a website address and make it go to the given website by clicking a button..I already created a button and a text box. How to go to the entered website address.
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Mar 19, 2009
I'm traying to write some query but I don't know much about DataBase. I have a variable that store the value entered on a textbox and I want to look value in the DataBase and then show the record on the DataGrid. I'm traying to build some query but I think I'm way off.
Here is my query:
SELECT Name, Record, Plan, [Numero de contrato]
FROM [Record de Pacientes]
WHERE (Name LIKE '%Variable%')
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Jul 8, 2010
I'm working on a query where I only want to use the 8 first characters entered in to the textbox. Is there some attribute to textbox that allows me to do this?
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