Textbox Validation For Alphabetical And Alphanumeric Textbox With "."?
Feb 26, 2012
This is what i am using but i want to include "." dot also as an input in the textbox
If Char.IsLetter(e.KeyChar) = False Then
If e.KeyChar = CChar(ChrW(Keys.Back)) or e.KeyChar = CChar(ChrW(Keys.Space)) Then
e.Handled = False
[code].....
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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 17, 2009
I am writing code that will list all the words alphabetically in a report that has been typed in by the user into a textbox. The report must also list the line number that each word appears on.
E.g.
The cat and
dog played
together in the
garden
Results to be displayed:
And 1
Cat 1
Dog 2
Garden 4
In 3
Played 2
The 1 3
Together 3
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Sep 28, 2010
sort a text from a textbox to see if it is in alphabetical order!
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Apr 11, 2010
I want to make a password cache, and i want it to make sure it contains both Alphbetical and Numerical characters
I also want it to be atleast 6 characters long
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Nov 25, 2010
how to convert alphanumeric data from textbox?
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Apr 2, 2009
I have form with ComboBox and TextBox. ComboBox has values A, B. And I would like to validate TextBox. If user select A so TextBox need to check for numeric and amount of numbers can't exceed 10 characters. If will entered not numeric characters error will indicated. If user select B so TextBox will check for string and user can enter any characters. Only if box is empty error will indicated.
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Jun 21, 2010
I am developing a project now. My problem is how can I create a autogenerate alphanumeric in the textbox to be used as an ID of entries. I'm using VB.Net 2005 and MS SQL Server 2005 STD.
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Jun 2, 2012
I am currently working on a personal project. I have the template for my program layed out and now just need help with some codes to go in it. I've looked for codes online to give me a better understanding but have had no luck so far. What I would like to do is to be able to "randomize" a line of characters with only capital letters and numbers 0-9. I need the overall length to be 14, but realistically 17. The displayed characters would be in this form. XXXX-XXXXXX-XXXX, so the dashes would have to fall into that area with all other characters being random. I want it to link from the 1 buton to the 1 textbox.
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Dec 8, 2011
I had used this code to validate email id in textbox,but it is not working properly?
Dim Expression As New System.Text.RegularExpressions.Regex("^[a-zA-Z][w.-]*[a-zA-Z0-9]@[a-zA-Z0-9][w.-]*[a-zA-Z0-9].[a-zA-Z][a-zA-Z.]*[a-zA-Z]$")
If Expression.IsMatch(Textbox1.Text) Then
MsgBox("The email address is valid.")
Else
[code]....
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Apr 3, 2011
I have a textbox which has some text on it and when the user will click on it,The problem is, as there is already a text on the textbox when the user will click will diappear to type his respective text, the program is saving the text written also. How to prevent that? All I want is to prevent the program saving a blank textbox and the text written on it?
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Mar 16, 2010
My question is the last code tag section above where the parameters are set for the input.If on the form there is a textbox that is required (on the db side to not allow nulls) how would you perform the validation before you tried to execute the update sql?Ex: say 'SerialNumberTextbox.Text' was empty or if you needed to have character constraints on what was typed like varchar(15) and they have 16 or more characters
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Feb 1, 2012
The problem i am having is after checking if the field is blank i want program to stop at that, right now it is going ahead and checking the username password also even though the field is blank and printing wrong username password. i am really new at this so please excuse the lack of knowledge
[Code]...
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Apr 12, 2012
I copied someone elses code and then changed it to suit my program.. however even when a valid email is entered is still says invalid email entry
Private Sub EmailTextBox_Validating(ByVal sender As System.Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles EmailTextBox.Validating
Dim temp As String
[code].....
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Jul 3, 2009
read code below as soon as user lefts field blank he should get the mesage thats what i am creating but ofcorse this code creates a bug and i get that message once for first textbox then for second and this process continues till i stop the project app gets stucked between thease two textboxes?
Private
Sub fname_LostFocus(ByVal sender As Object, ByVal e As System.EventArgs) Handles fname.LostFocus
If fname.Text = "" Then
[code]....
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Sep 29, 2009
I'm trying to add Validation to a Silverlight 3.0 TextBox but cannot seem to find and example which is complete, and not missing functionality that makes it work, I have this property[code]...
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Jul 18, 2011
Does vb 2010 have a 'REQUIRED" property or control that allow you to make a textbox a "required" field? I googled and saw something about required property in controls in toolbox but somehow I could not find it anywhere in my vb 2010 toolbox. Would it be easier to write it? Does anyone have sample code?
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Feb 17, 2012
I have to use basic methods to validate the data that's entered is acceptable. The chapter we are on only gets into checking if a value is =, >, < etc etc, but I want to check if a letter was entered where a number was expected, so I ended up
with this:
'Store user values
If Not IsNumeric(inputLoanAmount.Text) OrElse CDbl(inputLoanAmount.Text) < 0 _
OrElse Not Integer.TryParse(inputLoanTerm.Text, loanTerm) _[code]....
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Mar 26, 2010
I want to validate email in text box through key press event.my code is as follows
[Code]....
it is not working, provide solutions....
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Mar 20, 2009
on my form i have 2 text boxes. One email the other password. Her eis my code
Private Sub btnLog_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnLog.Click
If String.IsNullOrEmpty(txtMail.Text) Then
'txtMail is empty
MessageBox.Show("Email is empty", "Error", MessageBoxButtons.OK, _
MessageBoxIcon.Error, MessageBoxDefaultButton.Button1)
[Code]...
How can i make this more efficient. So that txtMail checks for text first then @ then more text then .com or something? i,m sure you know what i mean.and textpassword is more then 2 or three chars?
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Dec 15, 2011
How to enter the date in the masked text box and how to validate it
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Jan 13, 2009
OK, so i was going to verify a MaskedTextBox on whether the number input was or was not 10 digits in length. If not 10 digits, obviously they didn't put in a full phone number.
The problem is, even though you have no digits the length is still 10 so you can't check if the user put in 10 digits or not and return an error? Anyone got any ideas on testing for a phone number?I've seen tons of examples on date verification, but none on phone number verification.
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Aug 1, 2010
Is there any possibility that I can put this large chunk of code to a function so that I can call and verify the input without having to repeat the code for every textbox.keyPress event.
Here it is:
Private Sub TextBox1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox1.KeyPress
With e
If IsNumeric(.KeyChar) Or .KeyChar = "[" Or .KeyChar = "]" Or .KeyChar = ";" Or .KeyChar = ":" _
[Code] .....
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Jun 22, 2011
I have one textbox basically the user is going to enter in a 9 digit number or letters. From there I want to have a buttonclick event that validates this against 2 columns in a MSSQL Database. First to check if the number exists, next to check if it is active or inactive.
There are about 27000 rows of numbers so my main question is what is the best approach to handling something like this.
Should I create a view and validate in the click event. Should I create a stored procedure in sql that takes an input parameter and call it in the click event.
I was also reading about storing the information in a dataset however with that many records i am assuming that is going to be a slow process.
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Mar 2, 2010
I need to amend the code below to cater for only two Decimal places. Anyone know how i can do this?
[Code]....
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Feb 22, 2010
First off, let me apologize for my wording. I'm a student programmer and code primarily in JAVA so my my lingo may be a little skewed.I have created a method to create text boxes in my program that all have the same properties (ie certain text, size, font, fore color, backcolor,etc.) that looks like this:
[Code]...
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Sep 29, 2009
I have a number of textboxes on a form, and I want them all to accept the ENTER key. When the ENTER key is pressed, I want it to trigger the validating event. I know it will look something like this:
Private Sub Textbox1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles Textbox1.KeyPress, Textbox2.Keypress
[Code].....
What code can I use to cause the validating event to fire? I'd prefer the focus to stay in the textbox.
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Sep 12, 2011
Can I validate a texbox to have only True or false? You should enter True or false in the textbox.
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Jan 7, 2011
is there any way of making a textbox only accept intergers and treat them as such when doing calculations.
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Jun 14, 2009
I have created a custom validator for maximum characters for a multiline textbox in ASP.Net.Below is the code that I am using.
[Code]...
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