[2008] KeyPress - TextBox On My Form Can Only Accept Numbers 0-9, Backspace And '.' /without Quotes
Mar 10, 2009
I have a simple question regarding the KeyPress event. I'm trying to make it to where my TextBox on my form can only accept numbers 0-9, backspace and '.' /without quotes. I've successfully got it to accept numbers 0-9, accept backspace, I'm just wondering - what line do I add so that it can accept periods as well?
Here's my
Private Sub TextBox_KeyPress(ByVal sender As Object, ByVal e _
As System.Windows.Forms.KeyPressEventArgs) Handles _
TextBox.KeyPress
[CODE]...
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Aug 13, 2011
If I have a form that has a text field, and I want that field to only accept numbers or backspace, I can create a sub such as:
[Code]....
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Feb 28, 2009
I want to have a msgbox when user press 'backspace' in the textbox.
I wrote this:
Private Sub TextBox2_KeyPress(ByVal KeyAscii As Integer)
If KeyAscii = 8 Then
MsgBox("backspace")
End If
End Sub
Why it doesn't work?
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Jun 9, 2011
I want to control a textbox to only allow numbers, backspace and a certain length. Ive tried with the IsNumeric function but I cant seem to get it to work.
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Jan 15, 2009
I am trying to do an keypress event that only allows numbers, backspace, and enter. I have the part that only allows numbers
If Not (IsNumeric(e.KeyChar)) Then
e.Handled = True
End If
I need to know how to know what keychar the backspace and enter are.
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Apr 8, 2010
During runtime i want a textbox to accept only numbers from 0 to 100.How to validate this textbox?
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Nov 10, 2008
hows to make a textbox accept only numbers? and ".". i tried looking in the Help, couldnt find something relating to it. i guess it's something to do with the keys pressed on the keyboard so if i could determine and reject certain keys (anything thats not a number) it could work.
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Apr 2, 2012
I'm fairly new to VB.net (self taught) and was just wondering if someone out there could help me out with some code. I'm not trying to do anything to invovled, just have a textbox that takes numeric value from 1 to 10. I don't want it to take a string or any number above 10. If some types a word or character an error message will appear, telling them to enter a valid number. This is what I have, obviously it's not great as I am having problems.
[Code]...
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Nov 15, 2011
i need to validate the textbox such that in can accept numbers only but the entered no should be greater than 0 , it can be 0.1 and should be less than 101.
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Dec 11, 2011
How Can I make TextBox accept only Latin characters and numbers.?
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Oct 5, 2009
I 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
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Jun 1, 2010
I have two textboxes and as the user types in one I want to append the text to another textbox.How do I allow the user to delete characters in the first textbox with backspace/delete key and have those changes replicated in the 2nd textbox?
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Oct 14, 2009
I have an assignment that requires me to edit some code, I already did most of it but I need to make txtState control to only accept letters and the backspace key. I was never taught how to do this and I only know how to do it with numbers. Here is my code with everything done, including the format I was taught to do keypress in with numbers and backspace. Can someone show me how to replace those numbers pr whatever to work with letters?
[Code]...
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Nov 28, 2009
I got this nice piece of code from someone on this forum which only allows user to input numbers or backspace i need to modify it to allow the - sign so user can input a negative number Can someone share with me the code to modify this
If Not Char.IsDigit(e.KeyChar) Then e.Handled = True
If e.KeyChar = Chr(8) Then e.Handled = False 'allow Backspace
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Jun 22, 2010
move the focus to the next TextBox (don't worry about the Case 38, 58 etc too much I).
My Code:
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
'(Unrelated code here)
AddHandler Form1.KeyDown, AddressOf EnterkeyHandler 'Would like to understand this better
[code]....
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Mar 2, 2010
Error1Value of type 'String' cannot be converted to 'System.Windows.Forms.TextBox'With this code. Variables are in Module1.vb and this code resides in form1.vb
Private Sub btnSubmit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSubmit.Click
MyFile = Me.txFileName.Text
[code].....
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Mar 8, 2012
I have two issues. The first is that I want to make a textbox scrolling similar to how credits scroll. I don't want it to move on the form, just to scrolling the text down a line/pixel. I thought I could do it with the "Lines" element, but I'm not exactly sure how to execute it.
The other problem is with my flash screen. Right now I have it set so when a button is click, it goes onto the main form. I don't want to use the button but rather have it so if Enter is pressed at any time, it'll go to the main form. All the solutions I've tried to use involve the "e.Keycode" code, but for some reason its unavailable.
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Aug 9, 2009
estoy haciendo una aplicacion en visual web developer 2008 express edition , quisiera saber como puedo bloquear el backspace solo en un textbox , es q en este textbox estoy manejando fechas , las cuales las agrego mediante el control calendar extender de ajax ... lo que quisiera es q el usuario solo puede seleccionar la fecha mediante este control y no la pueda borrar con el backspace (seria lo mas facil ) .......ya intente con la propiedad readonly del textbox pero al cargarse la pagina me borra la fecha introducida por el control calendar extender de ajax ........o de que forma podria validar q sea una fecha correcta formato dia / mes / año (de 4 dijitos) o mes / dia / año (de 4 dijitos)
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Sep 27, 2009
Private Sub NumericKeyPress(ByVal sender As System.Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox1.KeyPress
[Code]...
and it wont let me use backspace. How would I make it so I can use backspace?
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Dec 16, 2009
The text boxes are not accepting numbers. The thing is i already converted the data inside the text box from string to integer.[code]...
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Feb 24, 2010
I have an application where a user is entering data into textfields using vb.net and then it is saving to excel. The textfields only accept numbers and do not allow the user to proceed unless all textfields have been filled out. If for some reason the user cannot enter in data (machine being broken etc...) is there a way that a messgagebox with a textfield can pop up allowing them to enter the reason that they couldn't enter a reading and then get saved to a textfile or sent as an email.
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Oct 19, 2010
I am in a class who has a prject due and I have a few questions to ask:
1) Is there a way to limit an InputBox to just accept numbers?
2) What control can I use to display 360 rows of data generated from a for loop?
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Dec 7, 2009
My listbox will accept any letter I add, but I can't get it to accept any numbers. I tried a case select for 1-100 and I couldn't get that to work either,
Private Sub btnCount_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCount.Click
'Determine word count and average letters / word in the sentence
[Code].....
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Mar 31, 2012
This displays as many numbers as i want but will also display a single letter.
Private Sub txtEnterGrades_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles txtEnterGrades.KeyPress
Dim intKeyValue As Integer
[Code].....
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Jun 2, 2011
how 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]....
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Jan 11, 2010
On Form Level, I use following codes to make textboxes to accept only numbers,How to add these codes in main module, instead of of writing these codes on every form.
If TypeName(Me.ActiveControl) = "TextBox" Then
With Me.ActiveControl
If Not IsNumeric(.Text) And .Text <> vbNullString Then
[code]...
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Mar 9, 2012
how to make the values in a text box accepts only letters in the text box for data that are for letters only and numbers for data requiring numbers only
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Aug 10, 2009
I have built an addin for outlook that has a usercontrol shimmed into the interface. Everything works wonderfully EXCEPT for one textbox on one subpanel of the control. I have tried everything I can think of, but have not been able to resolve the issue:
The textbox *(A regular System.Windows.Forms.Textbox) functions as you would expect in any application with one exception. It will NOT accept the backspace key. So much so that the KeyDown, KeyPress, KeyUp events will not even fire when I press the backspace key. There does not seem to be any parameter suppressing it, and the control has focus. What is even stranger is that it works completely fine if you hold down the shift key while pressing the backspace key.
[code]...
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Aug 2, 2009
I need to create a control for input a currecncies to a field. I'm planning to use a Textbox.
This is the format of the text box for currencies:
"XXXXXXXX.XX"
the dot "." must be fixed in the textbox and it should be loaded with the textbox. Furthermroe i have plans to code eachtime a user enters a number it should print the numbers from Right ot left.
eg: When user enters Number 1234.34
When the user enter these number they should display them as:
when user enters 1
0000.01
when the user enters 2:
0000.12
when the user enter 3:0001.23
When the user enters 4:
0012.34
When the user enters 3:0123.43
When the user enters 4:(after entering all digits in the number)1234.34
Could any one give a couple of ideas how to creat these kind of boxes?
I was thinking about creating a custom control (a Textbox) but still i need to have a the above format in the textbox!
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Oct 16, 2011
I'm beating my head against the desk on an advanced level solution in the VB 2010 book, and can't figure out what I am doing wrong. This is the exercise: JM Sales employs 8 salespeople. The sales manager wants an application that allows him to enter a bonus rate. The application should use the rate, along with the 8 salespeople, in an array, to calculate each salesperson's bonus amount. The application should display each salesperson's number (1 through 8) and bonus amount. as well as the total bonus paid, in the interface.
1. The txtRate control should accept only numbers, the period, and the Backscape key.
2. A one-dimensional array should be used that has elements initialized to the following sales amounts: 2400, 1500, 1600, 2790, 1000, 6300, 1300 and 2700.
I have the interface created and its error free (for now) but its not doing what its supposed to do. It's supposed to show something like this. I can provide screenshots if necessary. [code] but what I get is a list of 0.00's in all of the above fields. What am I doing wrong? Heres the code finally, sorry if I was overly descriptive. This is my first time doing one of the advanced exercises, maybe I should go back to intermediate.
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